Some standard content:
1L5 25.060.20
Machinery Industry Standard of the People's Republic of China
JB/T10015-1999
Square measuring instrument
1999-05-20 Issued
National Machinery Industry Standard
2000-01-01 Implementation
JB10015-1999
This standard is revised on the basis of 2BJ42013-876 Square measuring instrument. It does not contain the technical content of 2BJ42013-87, but is newly compiled according to relevant regulations. This standard will replace ZBJ42013-87 from now on. The appendix of this standard is the appendix of the standard. This standard is proposed and approved by the National Technical Committee for Measuring Instruments Standardization. The drafting unit of this standard is Beijing Measurement Factory. The main drafter of this standard is Sheng Di.
This standard was first issued in 1987,
People's Republic of China Machinery Industry Standard
Square oeusuring instrument
Square oeusuring lnstrument
JB10015-1999
Replaces 7B42:3-87
This standard specifies the type, basic parameters and values, technical requirements, marking and packaging of square oeusuring instruments. This standard is applicable to straight ruler inspection instruments (hereinafter referred to as inspection instruments) with a graduation value not exceeding 0.001mm. Cited standards
The provisions contained in the following standards become the provisions of this standard through reference in this standard: When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards: GB308-1989 Limited motion bearing steel ball
3 Definition
This standard adopts the following definition
3. Angle ruler detector
Based on the comparison measurement or direct measurement, the value is taken by measuring the micro-position along the column guide rail: a linear value difference measuring device used for wide-seat angle rulers and other 90° sample pole angles, also known as a right-angle ruler detector. Type, basic parameters and their numerical signals
Type of food inspection instrument, basic parameters and their effective values shall comply with the provisions of the table ". Table 1
Basic vertical parameters
Yuan Most standard use
Agent most angle scale disease degree
Change the diameter
Measurement side cloud
Comparison instrument position
Comparison teaching instrument indication value standard use
1 inspection item Checker
Type II Checker Acceptable
63~500
Number of Hearts: Level 1: Level 2
87 or 287
Fixed Measurement
42" type checker (circle 1), its workbench is fixed at both ends or one end is fixed and the other end is adjustable, the instrument has a reversing device, II dose checker [see Figure 2) its workbench is an integral type, the instrument has no reversing device (The structural load guarantee of Figure 1 and Figure 2 is for reference] The National Machinery Industry Encouragement 1999-05-20 approved 2000-01-01 implementation
S Technical Requirements
(the sample wheel is more promoted
to create a small exchange vector
endurance can be directly
mutual determination
required wheel pressure
steam head excellent machine classic
Xiaojiangjin Stop control
Some guide fast
Customized holding type
Needle Xuan
JB/Tt0015-1999
Movement explosion
Limited motion inspection
Quality measurement
Fixed surface wire
Agricultural head surface whole mechanism
5.1 Check the moving and operating parts of the instrument to ensure smooth and flexible movement without allowing There may be no sticking and jumping phenomenon, the parts should be flexible, and the installation should be smooth.
5.2 The working surface of the inspection instrument should not have defects such as rust, corrosion, scratches, burrs, etc. The painted surface should not have peeling and color loss. The plated surface should not have water leakage and shedding. 5.1 The lever gear comparator, analog comparator and other types of comparators used in the inspection instrument should comply with the provisions of the relevant standards. 4 The measuring tool of the inspection position shall not exceed 10N within the entire working range of the lever gear comparator. After the measuring force is changed, at the middle indicating position of the lever gear comparator, the difference in the measuring force in the two directions shall not exceed 103N. 5.5 The verticality of the column guide relative to the negative surface shall be within 210mm, the left and right direction shall not be greater than 0.01mm, and the front and rear direction shall not be less than -F0.05nme
JB/T100 1S-1999
5.6 The straightness tolerance of the measuring column guide rail of the tester. The straightness tolerance of the working surface of the tester is: 0.01mm for the tester of type 1, 0.012mm for the tester of type 2: 5.7 The straightness tolerance of the movable measuring cup and the fixed measuring support of the tester of type 1 is 0.5mm relative to the workbench surface and the positioning surface of the support plate, and the force direction is consistent. When using a flat probe, the coplanarity of the measuring surface of the movable probe and the fixed probe is required to be no more than 0.001mm. 5.8 The symmetry tolerance of the movable probe of the tester of type 1 to the center of the fixed measuring rod at the two extreme positions of the stroke is 0.1mm. 5.9 The consistency of the length of the movable measuring rod and the fixed measuring rod of the tester of type 1 is no more than 0.5mm. 5.10 The flatness tolerance of the two working tables of the tester of type 1 is 0.WImm: The margin is allowed to increase within 2mm on both sides and along the long side. The parallelism tolerance of the left and right working surfaces is 0.0ulmm in the longitudinal direction and 0.01mm in the transverse direction. 5. Type II inspection: The plane tolerance of the working surface of the working table is 2mm, and the edges are 5mm at both ends and 2mm long. The material of the 512T working surface is made of high-quality iron or high-quality steel. The working surface environment and surface viscosity values are shown in Table 2. The defects of the current enterprise tools are: the selection of the performance in the table is allowed. 5.13 The probe used for the grating instrument 1 can be a spherical probe or a plane probe. 5.13.1 Spherical probe
The diameter of the spherical probe is not less than 1mm. When the spherical probe uses a steel ball, the steel ball grade is G40 in GB3. b) The surface of the spherical probe should not have defects such as scratches and rust. The surface roughness R value is 0.10μm, and the spherical surface hardness is not less than 76HY. s.13.2 Planar probe
a) The flatness tolerance of the plane probe is 0.3μm, and the surface powder R value is 0.10μm. The surface hardness is not less than 16611V
) Planar probe 1. The true diameter of the working surface should not be less than 2mm, and the edge is allowed to be within the range of 1.2mm. The working surface is not allowed to have visible defects such as castability and pitting.
5.14 The indication stability of the inspection instrument shall not exceed 0.5um. 3,15 The indication error of the inspection instrument shall not exceed (1mm) within the test range. 6 Marking and packaging
6.1 Marking
6.1. The inspection instrument shall be marked with:
name of the manufacturer, registered trademark:
hl) instrument name;
e) instrument model;
product serial number:
e) date of publication.
6.1.2 The packaging box should be marked with:
a) Manufacturer's name or registered trademark:
b) Instrument name:
c) Instrument model;
d) Moisture-proof and anti-photography marks.
6.2 Packaging
JB/T10015-1999
6.2.1 The packaging of the detector should have good anti-rust, anti-vibration, moisture-proof and other measures. 6.2.2 Check whether the product certificate and product instruction manual are available. The product will be marked with the standard number and product serial number. A1 Inspection conditions
JB/T100t5—1999
Appendix A
【Appendix to the standard】
Inspection of the main accuracy items of the ruler tester The workroom of the tester should not be subject to external vibration. When the instrument is being tested, the room temperature should be within the range of 20℃±5℃, and the temperature change should not exceed 100%. The temperature balance time of the tested instrument and the calibration tool should not be less than A2 Inspection items, test methods and control tools A2.1 Consistency of measuring rod length
Inspection of the consistency error between the active measuring cup and the measured measuring rod of the type I tester, using the following method: lower the active cup to the lowest position, and place the 200mm×250mm standard gauge on the left.On the workbench, make the standard gauge balance surface stick to the positioning surface of the plate, use it to push the standard gauge to fix the probe, and at the same time adjust the two comparison test pointers to set the number; then change the direction, put the 200mm250mm standard gauge on the right workbench, make the standard gauge stick to the positioning surface of the plate, push the standard gauge to fix the probe by hand, and measure the plate. Repeat 2 times to get the minimum value, and record the value of the comparator to express it. The length consistency error of the measuring rod is calculated by formula (A), which is required to be no more than 0.5μm.
#L=(0-A1-24r
Wherein: 2"-- is the multiplication of the first degree tolerance of the standard gauge at the working height (the distance between the two measuring supports), m. A2.3 Straightness of the column guide rail
Ugly type inspection instrument The inspection of the straightness of the working surface of the column guide rail is carried out using an autocollimator with a reading of 1". The inspection is as follows: Place the column guide on a flat plate with the surface to be inspected facing up, place the reflectors at both ends of the working surface of the guide rail to be inspected, and adjust the autocollimator so that Its optical axis is parallel to the line connecting the two end points. Move the reflector along the measured surface with a pitch of (-100mm) and record the reading of the vertical force upward point at the same time. Calculate the straightness error of the surface by calculation (or graphic method) based on the recorded reading. A2.3 Flatness of the working surface of the negative workpiece
A2.3.11 The surface of the left and right workpieces of the type test transformer shall be tested in the following way: Use a 100mm diameter level 1 flat product and use the technical light wave method to perform a segmented retrograde test. During the test, place the flat product on the tested surface and make it The direction of the light wave in the interference band is parallel to the direction of the inspected surface. Based on the bending degree and direction of the interference band, the local flatness of each section of the inspected surface is calculated. Its size is calculated according to formula (A2):
In the formula: B = the ratio of the bending amount of the interference band to the width: 2-the length of the light quilt used, μm,
The segmented inspection is shown in Figure A1, and the measurements are made at 5., S, S, and S, positions. The flat product starts from one end of the inspected product, and the S, position is first measured to obtain the B value, and then the flat product is moved longitudinally by half the distance of the flat product diameter, and the 5 and positions are respectively measured as B. ;, S, position is:, S, position is B4, substitute B, B, B and B. into formula (A2), and calculate 5, 5,, 8, and 5. The local flatness of each section is obtained by calculation. The calculated percentages of,,,, 6, and. The flatness of the entire inspected section can be determined by drawing. The following example illustrates the drawing method I/T10015-[999
Example: Use a 100mm diameter 1-grade/product to inspect a 50mm wide and 250mm long section by the split method! The surface ratio of the table is 8, =-0 after segmented inspection. 09 μm;8,=-0.06±m:,-—0,15±m;6,=-0.1Bμm Assume that the X-axis represents the segment length extension, and the X-axis represents the flatness [see Figure A2] First, place A, and A, at the 0 point of the X-axis. Take 5,-0.09μm at point 1 to get point A., and take 5. —0.06μm at point A, to get point A, (5, is taken upwards for positive, and taken downwards for negative., is taken downwards for the end value time, and taken upwards for the negative value time., and take, and take, in opposite directions) draw a line connecting A,,, and extend it to intersect the perpendicular line of point 3 on the X-axis to get point A., take,--0.15 μm at point A, to get point A, and then draw a line connecting A+, A and extend it to intersect the perpendicular line of point 4 on the X-axis to get point A, and take -0.18n at point A to get point A,. Draw a line connecting A:A, and extend it to intersect the perpendicular line of point 5 on the × axis to get point A, then connect A., A straight line, connect A1, A+, A, A4, A. The broken line formed by the rotation points is the real plane of the inspected workbench surface. The distance from each rotation point to the straight line of A, A. is the error between the preparation point and the ideal plane, among which the maximum distance from the ideal plane is the flatness error of the inspected surface. It can be seen from the figure that the flatness error of the workbench is 0.72±m
. The length limit is
A2.32Ⅱ type inspection. The flatness of the workbench working surface is inspected with a 1* autocollimator. The inspection method is as follows: place the working table on the flat plate, place the reflector on the measured surface 1, adjust the autocollimator to be parallel to the measured surface, and arrange the points on the two diagonals of the measured surface with a reflection pitch (L=100mm) in turn according to the diagonal method. At the same time, record the readings of the vertical points, and use the recorded numbers to calculate the half-surface error of the measured surface using methods such as calculation and graphical method (graphic method), A2.41 type inspection instrument! The parallelism inspection of the working surface of the workbench 1 is a 2.4" type inspection instrument. The inspection method is as follows: put the second workbench on a flat plate [:, so that the workpiece is on the upper side, fix the reflector on a ruler with a length of 28mm and a linear accuracy greater than 0.4m, then leave a third ruler to mark the working surface, align the reflector on the lower workbench with the ruler, adjust the ruler to obtain the image of the reflector in the field and measure the position, then move the ruler to the other workbench Place the readings on the workbench surface and read them again. If the two readings are different, that means there is a parallelism error due to the workbench on the left. Test: A2.4.21 type inspection instrument with an adjustable T-type workpiece at one end. The parallelism test standard of the T-type workpiece is as follows: Place the 200mm*250mm standard gauge on the left workbench with its long side as the reference plane, move the movable probe to the upper end of the standard gauge and lock it, use it to push the standard gauge to tightly fix the probe: at the same time, adjust the pointer slightly so that the reverse number is equal; then reverse direction, place the 200mm>250mm standard gauge on the lower workbench: make the side of the standard gauge attached to the positioning surface of the lifting wrench. Used to operate the standard gauge close to the custom head for measurement, reverse the measurement book 2--3 changes, take the minimum value, record the value of the comparison pole, and express it as B. Then the left and right 1 worktable convexity P can be calculated by formula (A3), which is required to be no more than 1μmEP-0-8-
Formula: 4- is the actual verticality of the standard flag, m, 0.5 square rod length consistency and the comprehensive identification coefficient of the lever. Note: For comparative inspection, the consistency of the length of the movable gauge and the fixed bacteria must be guaranteed to be no less than 0.5mA2.5 The indication error of the false instrument
A2.5.11 type inspection instrument indication error inspection method is as follows: Place the 200mm×250mm standard gauge on the left T. work piece with the long side as the base, so that the standard gauge measuring surface is attached to the positioning surface of the support plate, adjust the standard dynamic measuring handle to the end of the standard gauge, and lock it, push the standard gauge close to the scraping probe by hand, and at the same time adjust the comparator pointer to make it read strong. After the age, change direction and place the 200mmx×250mm standard gauge on the right workbench so that the standard gauge is attached to the positioning surface of the plate. Use your hand to adjust the standard gauge to tightly fix the probe for measurement. Measure 2 to 3 times more, take the minimum value, and write down the reading of the comparator, expressed in .4. Then the indication error of the detector at the inspected point is calculated according to formula (A4). Within the measuring range of the detector, the indication error of each inspected point is calculated by the above method, which is required not to exceed ±2μmH.OA
wherein: H is the height of the standard gauge used, 24Mmm; 2
is the height of the standard gauge used minus the distance between the fixed measuring rod and the T work table, mm; 4 is the actual straightness of the standard gauge, mwwW.bzxz.Net
Note: The distance between the fixed measuring rod and the work table is 25mm-1A42
A2.5.2 Inspection method for indication error of type II detector is as follows: Place a 200mm×250mm standard gauge with its long side as the base surface in the center of the T work table, so that the standard rigid surface is attached to the baffle positioning surface. Adjust the slide to make the left comparator probe touch the working surface of the bottom end of the standard gauge, and adjust the comparator pointer from time to time to make its reading zero. Then, use the moving wheel to continuously measure the hysteresis of the standard gauge from the working surface of the bottom end of the standard gauge upwards, and record the reading difference between the bottom end and the top end of the comparator, expressed as A. Rotate the standard gauge 180° in the original position, and use the right side to compare. The second reading difference can be obtained by retrograde measuring the dial in the same way, expressed as 4. Then the error 6 of the inspection instrument at the inspected point is calculated according to formula (A5). Within the range of the measuring dial of the inspection instrument, the indication error of each inspected point is detected according to the above method, and it is required not to exceed ±2Lm: 8-4-42
Where: 4——is the actual verticality of the standard gauge, μmAZ.6 Standard version of the inspection instrument for setting and adjusting A2.6.1 The standard or marking is made of alloy work, and the roughness of the working surface is required to be not less than 766HV. A2.6.2 Standard gauge specifications: The flatness of the working surface and the bottom surface is required to be not more than 0.6μm, and the verticality of the working surface to the bottom surface is not less than 1.2μm: The surface roughness R value of the working surface and the bottom surface is 0.10m, 73. The straightness inspection of the column guide rail is carried out by using an autocollimator with a reading of 1". The inspection is as follows: Place the column guide on a flat plate with the work surface to be inspected facing upwards, place the reflectors at both ends of the work surface of the guide rail to be inspected, adjust the autocollimator so that its optical axis is parallel to the line connecting the two end points, move the reflector along the measured surface line with a pitch of (-100mm), and record the reading value of the vertical force upward point at the same time. The calculation method is used based on the recorded reading value. (or graphical method) calculate the straightness error of the surface. A2.3 Flatness of the working surface
A2.3.11 The surface of the left and right working tables of the type tester shall be tested in the following way: Use a 100mm diameter level plane to perform a segmented retrograde test using the technical light wave method. During the test, place the plane on the tested surface so that the direction of the interference band is parallel to the direction of the tested surface. Based on the degree and direction of the interference band, calculate the local error of each segment of the tested surface. The flatness of the part is measured according to the formula (A2):
Wherein: B is the ratio of the curvature of the band to the width: 2-the length of the optical quilt used, μm,
The segmented inspection is shown in Figure A1, and the measurements are made at 5., S, S, and S, positions. The flat product starts from the end of the product to be inspected, and the S, position is first measured to obtain the B value, and then the flat crystal is moved longitudinally by half the distance of the product diameter to obtain 5, position B; S, position: and S, position B4, and B, B, and S, respectively. Substituting B and B into formula (A2), the local flatness of each section is calculated to be 5, 5, 8, and 5. The calculated values of 6, 6, and 8 are used to determine the flatness of the entire surface to be inspected. The following example illustrates the drawing method. I/T10015-[999
Example: Use a 100mm diameter grade 1 product to inspect a 50mm wide and 250mm long surface by the split method. The flatness of each section after segmented inspection is: 8, = -0 09 μm;8,=-0.06±m:,-—0,15±m;6,=-0.1Bμm Assume that the X-axis represents the segment length and the X-axis represents the flatness [see Figure A2] First, put A, and A, at the 0 point of the X-axis. Take 5 at point 1, —0.09μm to get point A., and take 5 at point A, —0.06μm to get point A, (5, is taken upwards for positive, and taken downwards for negative., is taken downwards for the end value time, and taken upwards for the negative value time., and take, and take opposite directions) draw a line connecting A,,, and make it intersect with the perpendicular line of the 3 points on the X-axis to get point A., and take,--0.15 μm at point A, Get point A, then make a line connecting A+, A and extend it to intersect the perpendicular line of point 4 on the X axis to get point A, then take point A. and take the line of -0.18n to get point A. Make a line connecting A:A, and extend it to intersect the perpendicular line of point 5 on the X axis to get point A, then connect A., ... The inspection method is as follows: place the working table on the flat plate, place the reflector on the measured surface 1, adjust the autocollimator to be parallel to the measured surface, and arrange the points on the two diagonals of the measured surface with a reflection pitch (L=100mm) in turn according to the diagonal method. At the same time, record the readings of the vertical points, and use the recorded numbers to calculate the half-surface error of the measured surface using methods such as calculation and graphical method (graphic method), A2.41 type inspection instrument! The parallelism inspection of the working surface of the workbench 1 is a 2.4" type inspection instrument. The inspection method is as follows: put the second workbench on a flat plate [:, so that the workpiece is on the upper side, fix the reflector on a ruler with a length of 28mm and a linear accuracy greater than 0.4m, then leave a third ruler to mark the working surface, align the reflector on the lower workbench with the ruler, adjust the ruler to obtain the image of the reflector in the field and measure the position, then move the ruler to the other workbench Place the readings on the workbench surface and read them again. If the two readings are different, that means there is a parallelism error due to the workbench on the left. Test: A2.4.21 type inspection instrument with an adjustable T-type workpiece at one end. The parallelism test standard of the T-type workpiece is as follows: Place the 200mm*250mm standard gauge on the left workbench with its long side as the reference plane, move the movable probe to the upper end of the standard gauge and lock it, use it to push the standard gauge to tightly fix the probe: at the same time, adjust the pointer slightly so that the reverse number is equal; then reverse direction, place the 200mm>250mm standard gauge on the lower workbench: make the side of the standard gauge attached to the positioning surface of the lifting wrench. Used to operate the standard gauge close to the custom head for measurement, reverse the measurement book 2--3 changes, take the minimum value, record the value of the comparison pole, and express it as B. Then the left and right 1 worktable convexity P can be calculated by formula (A3), which is required to be no more than 1μmEP-0-8-
Formula: 4- is the actual verticality of the standard flag, m, 0.5 square rod length consistency and the comprehensive identification coefficient of the lever. Note: For comparative inspection, the consistency of the length of the movable gauge and the fixed bacteria must be guaranteed to be no less than 0.5mA2.5 The indication error of the false instrument
A2.5.11 type inspection instrument indication error inspection method is as follows: Place the 200mm×250mm standard gauge on the left T. work piece with the long side as the base, so that the standard gauge measuring surface is attached to the positioning surface of the support plate, adjust the standard dynamic measuring handle to the end of the standard gauge, and lock it, push the standard gauge close to the scraping probe by hand, and at the same time adjust the comparator pointer to make it read strong. After the age, change direction and place the 200mmx×250mm standard gauge on the right workbench so that the standard gauge is attached to the positioning surface of the plate. Use your hand to adjust the standard gauge to tightly fix the probe for measurement. Measure 2 to 3 times more, take the minimum value, and write down the reading of the comparator, expressed in .4. Then the indication error of the detector at the inspected point is calculated according to formula (A4). Within the measuring range of the detector, the indication error of each inspected point is calculated by the above method, which is required not to exceed ±2μmH.OA
wherein: H is the height of the standard gauge used, 24Mmm; 2
is the height of the standard gauge used minus the distance between the fixed measuring rod and the T work table, mm; 4 is the actual straightness of the standard gauge, m
Note: The distance between the fixed measuring rod and the work table is 25mm-1A42
A2.5.2 Inspection method for indication error of type II detector is as follows: Place a 200mm×250mm standard gauge with its long side as the base surface in the center of the T work table, so that the standard rigid surface is attached to the baffle positioning surface. Adjust the slide to make the left comparator probe touch the working surface of the bottom end of the standard gauge, and adjust the comparator pointer from time to time to make its reading zero. Then, use the moving wheel to continuously measure the hysteresis of the standard gauge from the working surface of the bottom end of the standard gauge upwards, and record the reading difference between the bottom end and the top end of the comparator, expressed as A. Rotate the standard gauge 180° in the original position, and use the right side to compare. The second reading difference can be obtained by retrograde measuring the dial in the same way, expressed as 4. Then the error 6 of the inspection instrument at the inspected point is calculated according to formula (A5). Within the range of the measuring dial of the inspection instrument, the indication error of each inspected point is detected according to the above method, and it is required not to exceed ±2Lm: 8-4-42
Where: 4——is the actual verticality of the standard gauge, μmAZ.6 Standard version of the inspection instrument for setting and adjusting A2.6.1 The standard or marking is made of alloy work, and the roughness of the working surface is required to be not less than 766HV. A2.6.2 Standard gauge specifications: The flatness of the working surface and the bottom surface is required to be not more than 0.6μm, and the verticality of the working surface to the bottom surface is not less than 1.2μm: The surface roughness R value of the working surface and the bottom surface is 0.10m, 73. The straightness inspection of the column guide rail is carried out by using an autocollimator with a reading of 1". The inspection is as follows: Place the column guide on a flat plate with the work surface to be inspected facing upwards, place the reflectors at both ends of the work surface of the guide rail to be inspected, adjust the autocollimator so that its optical axis is parallel to the line connecting the two end points, move the reflector along the measured surface line with a pitch of (-100mm), and record the reading value of the vertical force upward point at the same time. The calculation method is used based on the recorded reading value. (or graphical method) calculate the straightness error of the surface. A2.3 Flatness of the working surface
A2.3.11 The surface of the left and right working tables of the type tester shall be tested in the following way: Use a 100mm diameter level plane to perform a segmented retrograde test using the technical light wave method. During the test, place the plane on the tested surface so that the direction of the interference band is parallel to the direction of the tested surface. Based on the degree and direction of the interference band, calculate the local error of each segment of the tested surface. The flatness of the part is measured according to the formula (A2):
Wherein: B is the ratio of the curvature of the band to the width: 2-the length of the optical quilt used, μm,
The segmented inspection is shown in Figure A1, and the measurements are made at 5., S, S, and S, positions. The flat product starts from the end of the product to be inspected, and the S, position is first measured to obtain the B value, and then the flat crystal is moved longitudinally by half the distance of the product diameter to obtain 5, position B; S, position: and S, position B4, and B, B, and S, respectively. Substituting B and B into formula (A2), the local flatness of each section is calculated to be 5, 5, 8, and 5. The calculated values of 6, 6, and 8 are used to determine the flatness of the entire surface to be inspected. The following example illustrates the drawing method. I/T10015-[999
Example: Use a 100mm diameter grade 1 product to inspect a 50mm wide and 250mm long surface by the split method. The flatness of each section after segmented inspection is: 8, = -0 09 μm;8,=-0.06±m:,-—0,15±m;6,=-0.1Bμm Assume that the X-axis represents the segment length and the X-axis represents the flatness [see Figure A2] First, put A, and A, at the 0 point of the X-axis. Take 5 at point 1, —0.09μm to get point A., and take 5 at point A, —0.06μm to get point A, (5, is taken upwards for positive, and taken downwards for negative., is taken downwards for the end value time, and taken upwards for the negative value time., and take, and take opposite directions) draw a line connecting A,,, and make it intersect with the perpendicular line of the 3 points on the X-axis to get point A., and take,--0.15 μm at point A, Get point A, then make a line connecting A+, A and extend it to intersect the perpendicular line of point 4 on the X axis to get point A, then take point A. and take the line of -0.18n to get point A. Make a line connecting A:A, and extend it to intersect the perpendicular line of point 5 on the X axis to get point A, then connect A., ... The inspection method is as follows: place the working table on the flat plate, place the reflector on the measured surface 1, adjust the autocollimator to be parallel to the measured surface, and arrange the points on the two diagonals of the measured surface with a reflection pitch (L=100mm) in turn according to the diagonal method. At the same time, record the readings of the vertical points, and use the recorded numbers to calculate the half-surface error of the measured surface using methods such as calculation and graphical method (graphic method), A2.41 type inspection instrument! The parallelism inspection of the working surface of the workbench 1 is a 2.4" type inspection instrument. The inspection method is as follows: put the second workbench on a flat plate [:, so that the workpiece is on the upper side, fix the reflector on a ruler with a length of 28mm and a linear accuracy greater than 0.4m, then leave a third ruler to mark the working surface, align the reflector on the lower workbench with the ruler, adjust the ruler to obtain the image of the reflector in the field and measure the position, then move the ruler to the other workbench Place the readings on the workbench surface and read them again. If the two readings are different, that means there is a parallelism error due to the workbench on the left. Test: A2.4.21 type inspection instrument with an adjustable T-type workpiece at one end. The parallelism test standard of the T-type workpiece is as follows: Place the 200mm*250mm standard gauge on the left workbench with its long side as the reference plane, move the movable probe to the upper end of the standard gauge and lock it, use it to push the standard gauge to tightly fix the probe: at the same time, adjust the pointer slightly so that the reverse number is equal; then reverse direction, place the 200mm>250mm standard gauge on the lower workbench: make the side of the standard gauge attached to the positioning surface of the lifting wrench. Used to operate the standard gauge close to the custom head for measurement, reverse the measurement book 2--3 changes, take the minimum value, record the value of the comparison pole, and express it as B. Then the left and right 1 worktable convexity P can be calculated by formula (A3), which is required to be no more than 1μmEP-0-8-
Formula: 4- is the actual verticality of the standard flag, m, 0.5 square rod length consistency and the comprehensive identification coefficient of the lever. Note: For comparative inspection, the consistency of the length of the movable gauge and the fixed bacteria must be guaranteed to be no less than 0.5mA2.5 The indication error of the false instrument
A2.5.11 type inspection instrument indication error inspection method is as follows: Place the 200mm×250mm standard gauge on the left T. work piece with the long side as the base, so that the standard gauge measuring surface is attached to the positioning surface of the support plate, adjust the standard dynamic measuring handle to the end of the standard gauge, and lock it, push the standard gauge close to the scraping probe by hand, and at the same time adjust the comparator pointer to make it read strong. After the age, change direction and place the 200mmx×250mm standard gauge on the right workbench so that the standard gauge is attached to the positioning surface of the plate. Use your hand to adjust the standard gauge to tightly fix the probe for measurement. Measure 2 to 3 times more, take the minimum value, and write down the reading of the comparator, expressed in .4. Then the indication error of the detector at the inspected point is calculated according to formula (A4). Within the measuring range of the detector, the indication error of each inspected point is calculated by the above method, which is required not to exceed ±2μmH.OA
wherein: H is the height of the standard gauge used, 24Mmm; 2
is the height of the standard gauge used minus the distance between the fixed measuring rod and the T work table, mm; 4 is the actual straightness of the standard gauge, m
Note: The distance between the fixed measuring rod and the work table is 25mm-1A42
A2.5.2 Inspection method for indication error of type II detector is as follows: Place a 200mm×250mm standard gauge with its long side as the base surface in the center of the T work table, so that the standard rigid surface is attached to the baffle positioning surface. Adjust the slide to make the left comparator probe touch the working surface of the bottom end of the standard gauge, and adjust the comparator pointer from time to time to make its reading zero. Then, use the moving wheel to continuously measure the hysteresis of the standard gauge from the working surface of the bottom end of the standard gauge upwards, and record the reading difference between the bottom end and the top end of the comparator, expressed as A. Rotate the standard gauge 180° in the original position, and use the right side to compare. The second reading difference can be obtained by retrograde measuring the dial in the same way, expressed as 4. Then the error 6 of the inspection instrument at the inspected point is calculated according to formula (A5). Within the range of the measuring dial of the inspection instrument, the indication error of each inspected point is detected according to the above method, and it is required not to exceed ±2Lm: 8-4-42
Where: 4——is the actual verticality of the standard gauge, μmAZ.6 Standard version of the inspection instrument for setting and adjusting A2.6.1 The standard or marking is made of alloy work, and the roughness of the working surface is required to be not less than 766HV. A2.6.2 Standard gauge specifications: The flatness of the working surface and the bottom surface is required to be not more than 0.6μm, and the verticality of the working surface to the bottom surface is not less than 1.2μm: The surface roughness R value of the working surface and the bottom surface is 0.10m, 7The position measurement is progressive. The flat product starts from one end of the product to be inspected, and the S, position B values are measured first. Then the flat crystal is moved longitudinally by half the distance of the product diameter, and the position of 5 is B; the position of S is:, the position of S is B4. Substitute B, B, B and B into formula (A2), and the local flatness of each section of 5, 5, 8, and 5 is obtained by calculation. The calculated values of 6, 6, and 7 are used to determine the flatness of the entire product to be inspected. The following example illustrates the drawing method I/T10015-[999
Example: Use a 100mm diameter grade 1 product to inspect a 50mm wide and 250mm long product by the split method! The surface rate of the workpiece is as follows: 8,=-0 09 μm; 8,=-0.06±m:,-—0,15±m; 6,=-0.1Bμm. Assume that the X-axis represents the segment length and the axis represents the flatness [see Figure A2]. First, place A1 and A2 at the 0 point of the X-axis and take 5 at point 1 to get A.—0.09μm, and take 5 at point A. —0.06μm to get point A, (5, is taken upward for positive, and downward for negative., is taken downward for the stop value time, and is taken upward for negative value time., and is taken in opposite directions with,) draw a line connecting A,,, and extend it to intersect the perpendicular line of point 3 on the X axis to get point A., at point A, take,--0.15μm to get point A,, then draw a line connecting A+, A and extend it to intersect the perpendicular line of point 4 on the X axis to get point A,, and take point A. at point A. take -0.18n to get point A,. Draw a line connecting A:A, and extend it to intersect the perpendicular line of point 5 on the X axis to get point A,, and then connect A., A straight line, connect AI, A+, A, A4, A. The broken line formed by the rotation rate points is the real plane of the workbench surface to be inspected, and each rotation rate point is connected to A,, A. The distance between the workbench and the ideal plane is the error between the workbench point and the ideal plane, and the maximum distance from the ideal plane is the flatness error of the surface to be inspected. It can be seen from Figure 2 that the flatness error of the workbench is 0.72±m
. The A2.32Ⅱ type inspection is to use a 1* autocollimator to inspect the flatness of the workbench working surface. The inspection method is as follows: put the workbench on the flat plate, put the reflector on the measured surface, adjust the autocollimator to be parallel to the measured surface, and arrange the points on the two diagonals of the measured surface with a reflector pitch (L=100mm) in turn according to the diagonal method. At the same time, record the readings of the points in the straight direction, and use the recorded numbers to calculate the half-surface error of the measured surface, A2.41 type inspection instrument! The parallelism inspection of the working surface of the workbench 1 is a 2.4" type inspection instrument. The inspection method is as follows: put the second workbench on a flat plate [:, so that the workpiece is on the upper side, fix the reflector on a ruler with a length of 28mm and a linear accuracy greater than 0.4m, then leave a third ruler to mark the working surface, align the reflector on the lower workbench with the ruler, adjust the ruler to obtain the image of the reflector in the field and measure the position, then move the ruler to the other workbench Place the readings on the workbench surface and read them again. If the two readings are different, that means there is a parallelism error due to the workbench on the left. Test: A2.4.21 type inspection instrument with an adjustable T-type workpiece at one end. The parallelism test standard of the T-type workpiece is as follows: Place the 200mm*250mm standard gauge on the left workbench with its long side as the reference plane, move the movable probe to the upper end of the standard gauge and lock it, use it to push the standard gauge to tightly fix the probe: at the same time, adjust the pointer slightly so that the reverse number is equal; then reverse direction, place the 200mm>250mm standard gauge on the lower workbench: make the side of the standard gauge attached to the positioning surface of the lifting wrench. Used to operate the standard gauge close to the custom head for measurement, reverse the measurement book 2--3 changes, take the minimum value, record the value of the comparison pole, and express it as B. Then the left and right 1 worktable convexity P can be calculated by formula (A3), which is required to be no more than 1μmEP-0-8-
Formula: 4- is the actual verticality of the standard flag, m, 0.5 square rod length consistency and the comprehensive identification coefficient of the lever. Note: For comparative inspection, the consistency of the length of the movable gauge and the fixed bacteria must be guaranteed to be no less than 0.5mA2.5 The indication error of the false instrument
A2.5.11 type inspection instrument indication error inspection method is as follows: Place the 200mm×250mm standard gauge on the left T. work piece with the long side as the base, so that the standard gauge measuring surface is attached to the positioning surface of the support plate, adjust the standard dynamic measuring handle to the end of the standard gauge, and lock it, push the standard gauge close to the scraping probe by hand, and at the same time adjust the comparator pointer to make it read strong. After the age, change direction and place the 200mmx×250mm standard gauge on the right workbench so that the standard gauge is attached to the positioning surface of the plate. Use your hand to adjust the standard gauge to tightly fix the probe for measurement. Measure 2 to 3 times more, take the minimum value, and write down the reading of the comparator, expressed in .4. Then the indication error of the detector at the inspected point is calculated according to formula (A4). Within the measuring range of the detector, the indication error of each inspected point is calculated by the above method, which is required not to exceed ±2μmH.OA
wherein: H is the height of the standard gauge used, 24Mmm; 2
is the height of the standard gauge used minus the distance between the fixed measuring rod and the T work table, mm; 4 is the actual straightness of the standard gauge, m
Note: The distance between the fixed measuring rod and the work table is 25mm-1A42
A2.5.2 Inspection method for indication error of type II detector is as follows: Place a 200mm×250mm standard gauge with its long side as the base surface in the center of the T work table, so that the standard rigid surface is attached to the baffle positioning surface. Adjust the slide to make the left comparator probe touch the working surface of the bottom end of the standard gauge, and adjust the comparator pointer from time to time to make its reading zero. Then, use the moving wheel to continuously measure the hysteresis of the standard gauge from the working surface of the bottom end of the standard gauge upwards, and record the reading difference between the bottom end and the top end of the comparator, expressed as A. Rotate the standard gauge 180° in the original position, and use the right side to compare. The second reading difference can be obtained by retrograde measuring the dial in the same way, expressed as 4. Then the error 6 of the inspection instrument at the inspected point is calculated according to formula (A5). Within the range of the measuring dial of the inspection instrument, the indication error of each inspected point is detected according to the above method, and it is required not to exceed ±2Lm: 8-4-42
Where: 4——is the actual verticality of the standard gauge, μmAZ.6 Standard version of the inspection instrument for setting and adjusting A2.6.1 The standard or marking is made of alloy work, and the roughness of the working surface is required to be not less than 766HV. A2.6.2 Standard gauge specifications: The flatness of the working surface and the bottom surface is required to be not more than 0.6μm, and the verticality of the working surface to the bottom surface is not less than 1.2μm: The surface roughness R value of the working surface and the bottom surface is 0.10m, 7The position measurement is progressive. The flat product starts from one end of the product to be inspected, and the S, position B values are measured first. Then the flat crystal is moved longitudinally by half the distance of the product diameter, and the position of 5 is B; the position of S is:, the position of S is B4. Substitute B, B, B and B into formula (A2), and the local flatness of each section of 5, 5, 8, and 5 is obtained by calculation. The calculated values of 6, 6, and 7 are used to determine the flatness of the entire product to be inspected. The following example illustrates the drawing method I/T10015-[999
Example: Use a 100mm diameter grade 1 product to inspect a 50mm wide and 250mm long product by the split method! The surface rate of the workpiece is as follows: 8,=-0 09 μm; 8,=-0.06±m:,-—0,15±m; 6,=-0.1Bμm. Assume that the X-axis represents the segment length and the axis represents the flatness [see Figure A2]. First, place A1 and A2 at the 0 point of the X-axis and take 5 at point 1 to get A.—0.09μm, and take 5 at point A. —0.06μm to get point A, (5, is taken upward for positive, and downward for negative., is taken downward for the stop value time, and is taken upward for negative value time., and is taken in opposite directions with,) draw a line connecting A,,, and extend it to intersect the perpendicular line of point 3 on the X axis to get point A., at point A, take,--0.15μm to get point A,, then draw a line connecting A+, A and extend it to intersect the perpendicular line of point 4 on the X axis to get point A,, and take point A. at point A. take -0.18n to get point A,. Draw a line connecting A:A, and extend it to intersect the perpendicular line of point 5 on the X axis to get point A,, and then connect A., A straight line, connect AI, A+, A, A4, A. The broken line formed by the rotation rate points is the real plane of the workbench surface to be inspected, and each rotation rate point is connected to A,, A. The distance between the workbench and the ideal plane is the error between the workbench point and the ideal plane, and the maximum distance from the ideal plane is the flatness error of the surface to be inspected. It can be seen from Figure 2 that the flatness error of the workbench is 0.72±m
. The A2.32Ⅱ type inspection is to use a 1* autocollimator to inspect the flatness of the workbench working surface. The inspection method is as follows: put the workbench on the flat plate, put the reflector on the measured surface, adjust the autocollimator to be parallel to the measured surface, and arrange the points on the two diagonals of the measured surface with a reflector pitch (L=100mm) in turn according to the diagonal method. At the same time, record the readings of the points in the straight direction, and use the recorded numbers to calculate the half-surface error of the measured surface, A2.41 type inspection instrument! The parallelism inspection of the working surface of the workbench 1 is a 2.4" type inspection instrument. The inspection method is as follows: put the second workbench on a flat plate [:, so that the workpiece is on the upper side, fix the reflector on a ruler with a length of 28mm and a linear accuracy greater than 0.4m, then leave a third ruler to mark the working surface, align the reflector on the lower workbench with the ruler, adjust the ruler to obtain the image of the reflector in the field and measure the position, then move the ruler to the other workbench Place the readings on the workbench surface and read them again. If the two readings are different, that means there is a parallelism error due to the workbench on the left. Test: A2.4.21 type inspection instrument with an adjustable T-type workpiece at one end. The parallelism test standard of the T-type workpiece is as follows: Place the 200mm*250mm standard gauge on the left workbench with its long side as the reference plane, move the movable probe to the upper end of the standard gauge and lock it, use it to push the standard gauge to tightly fix the probe: at the same time, adjust the pointer slightly so that the reverse number is equal; then reverse direction, place the 200mm>250mm standard gauge on the lower workbench: make the side of the standard gauge attached to the positioning surface of the lifting wrench. Used to operate the standard gauge close to the custom head for measurement, reverse the measurement book 2--3 changes, take the minimum value, record the value of the comparison pole, and express it as B. Then the left and right 1 worktable convexity P can be calculated by formula (A3), which is required to be no more than 1μmEP-0-8-
Formula: 4- is the actual verticality of the standard flag, m, 0.5 square rod length consistency and the comprehensive identification coefficient of the lever. Note: For comparative inspection, the consistency of the length of the movable gauge and the fixed bacteria must be guaranteed to be no less than 0.5mA2.5 The indication error of the false instrument
A2.5.11 type inspection instrument indication error inspection method is as follows: Place the 200mm×250mm standard gauge on the left T. work piece with the long side as the base, so that the standard gauge measuring surface is attached to the positioning surface of the support plate, adjust the standard dynamic measuring handle to the end of the standard gauge, and lock it, push the standard gauge close to the scraping probe by hand, and at the same time adjust the comparator pointer to make it read strong. After the age, change direction and place the 200mmx×250mm standard gauge on the right workbench so that the standard gauge is attached to the positioning surface of the plate. Use your hand to adjust the standard gauge to tightly fix the probe for measurement. Measure 2 to 3 times more, take the minimum value, and write down the reading of the comparator, expressed in .4. Then the indication error of the detector at the inspected point is calculated according to formula (A4). Within the measuring range of the detector, the indication error of each inspected point is calculated by the above method, which is required not to exceed ±2μmH.OA
wherein: H is the height of the standard gauge used, 24Mmm; 2
is the height of the standard gauge used minus the distance between the fixed measuring rod and the T work table, mm; 4 is the actual straightness of the standard gauge, m
Note: The distance between the fixed measuring rod and the work table is 25mm-1A42
A2.5.2 Inspection method for indication error of type II detector is as follows: Place a 200mm×250mm standard gauge with its long side as the base surface in the center of the T work table, so that the standard rigid surface is attached to the baffle positioning surface. Adjust the slide to make the left comparator probe touch the working surface of the bottom end of the standard gauge, and adjust the comparator pointer from time to time to make its reading zero. Then, use the moving wheel to continuously measure the hysteresis of the standard gauge from the working surface of the bottom end of the standard gauge upwards, and record the reading difference between the bottom end and the top end of the comparator, expressed as A. Rotate the standard gauge 180° in the original position, and use the right side to compare. The second reading difference can be obtained by retrograde measuring the dial in the same way, expressed as 4. Then the error 6 of the inspection instrument at the inspected point is calculated according to formula (A5). Within the range of the measuring dial of the inspection instrument, the indication error of each inspected point is detected according to the above method, and it is required not to exceed ±2Lm: 8-4-42
Where: 4——is the actual verticality of the standard gauge, μmAZ.6 Standard version of the inspection instrument for setting and adjusting A2.6.1 The standard or marking is made of alloy work, and the roughness of the working surface is required to be not less than 766HV. A2.6.2 Standard gauge specifications: The flatness of the working surface and the bottom surface is required to be not more than 0.6μm, and the verticality of the working surface to the bottom surface is not less than 1.2μm: The surface roughness R value of the working surface and the bottom surface is 0.10m, 732Ⅱ type inspection The flatness of the workbench working surface is inspected with a 1* autocollimator. The inspection method is as follows: Place the workbench on a flat surface, place the reflector on the measured surface, adjust the autocollimator to be parallel to the measured surface, and arrange the points on the two diagonals of the measured surface with a reflector pitch (L=100mm) in turn according to the diagonal method. At the same time, record the readings of the vertical points, and use the recorded numbers to calculate the half-surface error of the measured surface (diagram method). A2.41 type inspection instrument! The parallelism inspection of the working surface of the workbench 1 is a 2.4" type inspection instrument. The inspection method is as follows: put the second workbench on a flat plate [:, so that the workpiece is on the upper side, fix the reflector on a ruler with a length of 28mm and a linear accuracy greater than 0.4m, then leave a third ruler to mark the working surface, align the reflector on the lower workbench with the ruler, adjust the ruler to obtain the image of the reflector in the field and measure the position, then move the ruler to the other workbench Place the readings on the workbench surface and read them again. If the two readings are different, that means there is a parallelism error due to the workbench on the left. Test: A2.4.21 type inspection instrument with an adjustable T-type workpiece at one end. The parallelism test standard of the T-type workpiece is as follows: Place the 200mm*250mm standard gauge on the left workbench with its long side as the reference plane, move the movable probe to the upper end of the standard gauge and lock it, use it to push the standard gauge to tightly fix the probe: at the same time, adjust the pointer slightly so that the reverse number is equal; then reverse direction, place the 200mm>250mm standard gauge on the lower workbench: make the side of the standard gauge attached to the positioning surface of the lifting wrench. Used to operate the standard gauge close to the custom head for measurement, reverse the measurement book 2--3 changes, take the minimum value, record the value of the comparison pole, and express it as B. Then the left and right 1 worktable convexity P can be calculated by formula (A3), which is required to be no more than 1μmEP-0-8-
Formula: 4- is the actual verticality of the standard flag, m, 0.5 square rod length consistency and the comprehensive identification coefficient of the lever. Note: For comparative inspection, the consistency of the length of the movable gauge and the fixed bacteria must be guaranteed to be no less than 0.5mA2.5 The indication error of the false instrument
A2.5.11 type inspection instrument indication error inspection method is as follows: Place the 200mm×250mm standard gauge on the left T. work piece with the long side as the base, so that the standard gauge measuring surface is attached to the positioning surface of the support plate, adjust the standard dynamic measuring handle to the end of the standard gauge, and lock it, push the standard gauge close to the scraping probe by hand, and at the same time adjust the comparator pointer to make it read strong. After the age, change direction and place the 200mmx×250mm standard gauge on the right workbench so that the standard gauge is attached to the positioning surface of the plate. Use your hand to adjust the standard gauge to tightly fix the probe for measurement. Measure 2 to 3 times more, take the minimum value, and write down the reading of the comparator, expressed in .4. Then the indication error of the detector at the inspected point is calculated according to formula (A4). Within the measuring range of the detector, the indication error of each inspected point is calculated by the above method, which is required not to exceed ±2μmH.OA
wherein: H is the height of the standard gauge used, 24Mmm; 2
is the height of the standard gauge used minus the distance between the fixed measuring rod and the T work table, mm; 4 is the actual straightness of the standard gauge, m
Note: The distance between the fixed measuring rod and the work table is 25mm-1A42
A2.5.2 Inspection method for indication error of type II detector is as follows: Place a 200mm×250mm standard gauge with its long side as the base surface in the center of the T work table, so that the standard rigid surface is attached to the baffle positioning surface. Adjust the slide to make the left comparator probe touch the working surface of the bottom end of the standard gauge, and adjust the comparator pointer from time to time to make its reading zero. Then, use the moving wheel to continuously measure the hysteresis of the standard gauge from the working surface of the bottom end of the standard gauge upwards, and record the reading difference between the bottom end and the top end of the comparator, expressed as A. Rotate the standard gauge 180° in the original position, and use the right side to compare. The second reading difference can be obtained by retrograde measuring the dial in the same way, expressed as 4. Then the error 6 of the inspection instrument at the inspected point is calculated according to formula (A5). Within the range of the measuring dial of the inspection instrument, the indication error of each inspected point is detected according to the above method, and it is required not to exceed ±2Lm: 8-4-42
Where: 4——is the actual verticality of the standard gauge, μmAZ.6 Standard version of the inspection instrument for setting and adjusting A2.6.1 The standard or marking is made of alloy work, and the roughness of the working surface is required to be not less than 766HV. A2.6.2 Standard gauge specifications: The flatness of the working surface and the bottom surface is required to be not more than 0.6μm, and the verticality of the working surface to the bottom surface is not less than 1.2μm: The surface roughness R value of the working surface and the bottom surface is 0.10m, 732Ⅱ type inspection The flatness of the workbench working surface is inspected with a 1* autocollimator. The inspection method is as follows: Place the workbench on a flat surface, place the reflector on the measured surface, adjust the autocollimator to be parallel to the measured surface, and arrange the points on the two diagonals of the measured surface with a reflector pitch (L=100mm) in turn according to the diagonal method. At the same time, record the readings of the vertical points, and use the recorded numbers to calculate the half-surface error of the measured surface (diagram method). A2.41 type inspection instrument! The parallelism inspection of the working surface of the workbench 1 is a 2.4" type inspection instrument. The inspection method is as follows: put the second workbench on a flat plate [:, so that the workpiece is on the upper side, fix the reflector on a ruler with a length of 28mm and a linear accuracy greater than 0.4m, then leave a third ruler to mark the working surface, align the reflector on the lower workbench with the ruler, adjust the ruler to obtain the image of the reflector in the field and measure the position, then move the ruler to the other workbench Place the readings on the workbench surface and read them again. If the two readings are different, that means there is a parallelism error due to the workbench on the left. Test: A2.4.21 type inspection instrument with an adjustable T-type workpiece at one end. The parallelism test standard of the T-type workpiece is as follows: Place the 200mm*250mm standard gauge on the left workbench with its long side as the reference plane, move the movable probe to the upper end of the standard gauge and lock it, use it to push the standard gauge to tightly fix the probe: at the same time, adjust the pointer slightly so that the reverse number is equal; then reverse direction, place the 200mm>250mm standard gauge on the lower workbench: make the side of the standard gauge attached to the positioning surface of the lifting wrench. Used to operate the standard gauge close to the custom head for measurement, reverse the measurement book 2--3 changes, take the minimum value, record the value of the comparison pole, and express it as B. Then the left and right 1 worktable convexity P can be calculated by formula (A3), which is required to be no more than 1μmEP-0-8-
Formula: 4- is the actual verticality of the standard flag, m, 0.5 square rod length consistency and the comprehensive identification coefficient of the lever. Note: For comparative inspection, the consistency of the length of the movable gauge and the fixed bacteria must be guaranteed to be no less than 0.5mA2.5 The indication error of the false instrument
A2.5.11 type inspection instrument indication error inspection method is as follows: Place the 200mm×250mm standard gauge on the left T. work piece with the long side as the base, so that the standard gauge measuring surface is attached to the positioning surface of the support plate, adjust the standard dynamic measuring handle to the end of the standard gauge, and lock it, push the standard gauge close to the scraping probe by hand, and at the same time adjust the comparator pointer to make it read strong. After the age, change direction and place the 200mmx×250mm standard gauge on the right workbench so that the standard gauge is attached to the positioning surface of the plate. Use your hand to adju
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