Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T2999.2—1998
Camshaft Grinder
Published on July 17, 1998
Precision Inspection
Implemented on December 1, 1998
National Bureau of Machinery Industry
JB/T2999.2—1998
This standard has revised JB2999—81 "Camshaft Grinder Precision" based on the user's requirements and reference to GB/T4685-94 "External Cylindrical Grinder Precision". GB/T4685-94 adopts ISO2433:1984 "External Cylindrical Grinder Precision Inspection" in a non-equivalent manner. The main differences between this standard and JB2999—81 are: 1. The tolerance values of G01, G1, and G5 have been modified; the repeat positioning accuracy (G12 item) when the grinding wheel is introduced has been increased. This standard is part of the camshaft grinder series of standards. JBT2999, under the general title of "Camshaft Grinder", includes the following three parts: Part 1 (i.e. JB/T2999.1): Parameters; Part 2 (i.e. JB/T2999.2): Accuracy inspection; Part 3 (i.e. JB/T2999.3): Technical conditions. This standard will replace JB2999-81 from the date of implementation. This standard was proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Grinding Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard is Changchun No. 1 Machine Tool Factory. This standard was first issued in December 1981. 1 Scope
Machinery Industry Standard of the People's Republic of China
Camshaft Grinding Machine
Precision Inspection
JB/T2999.2-1998
Replaces JB2999-81
This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of camshaft grinding machines with ordinary accuracy. This standard is applicable to camshaft grinding machines with ordinary accuracy, with a maximum workpiece rotation diameter of 125-200mm and a maximum workpiece length of 315-2000mm.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. JB2670-82 General Rules for Precision Inspection of Metal Cutting Machine Tools 3 General Requirements
3.1 Adjust the installation level in accordance with 3.1 of JB2670-82. Generally, a level should be placed on the bed, and the readings of the level in the longitudinal and transverse directions should not exceed 0.04/1000.
3.2 During the inspection, the actual inspection order can generally be arranged according to the requirements of the assembly and disassembly inspection tools, inspection convenience, and thermal inspection items. 3.3 During the working accuracy inspection, the inspection of the test piece should be carried out after fine grinding. 3.4 When the measured length is different from the length specified in this standard, the tolerance should be converted according to the measurable length according to the provisions of 2.3.1.1 in JB2670-82. When the conversion result is less than 0.001mm, it is still calculated as 0.001mm. 3.5 According to the agreement between the user and the manufacturer, the inspection items can be increased or decreased. Approved by the State Bureau of Machinery Industry on July 17, 1998 and implemented on December 1, 1998
4 Pre-adjustment inspection
Inspection items
Straightness of the longitudinal guide rail of the bed:
a. In the vertical plane
b. In the horizontal plane
The parallelism of the longitudinal guide rail of the bed in the vertical plane
is 0.020 within a length of 1000, and the tolerance value increases by 0.015 for every increase of 1000 in length, and the maximum tolerance value is
Local tolerance:||t ... ||For every 1000 length
0.02/1000
For the entire length of the guide rail
≤4000
0.04/1000
0.05/1000
Inspection tools
Autocollimator
Special inspection fixture
Level
Special inspection fixture
Inspection method
Refer to the relevant provisions of JB2670
5.2.1.2.2
a. Place the reflector of the autocollimator on the special inspection fixture
of the longitudinal guide rail of the bed, and place the autocollimator light tube outside the bed. Move the inspection fixture, record the reading every length of the inspection fixture, and draw the error curve of the guide rail.
The full-length error is calculated as the maximum algebraic difference between the coordinate values of the error curve connecting the two ends of the error curve. The local error is calculated as the maximum value of the coordinate difference between the two adjacent points on the error curve connecting the two ends.
b. Turn the eyepiece of the autocollimator light tube back
90° and perform the same inspection again
5.4.1.2.7
Place the level moving inspection fixture on the special inspection fixture of the longitudinal guide rail of the bed
vertically to the moving direction of the inspection fixture for inspection.
The error is measured by the maximum algebraic difference between the level readings on each 1000 length and the total
length
JB/T2999.2-
5 Geometric accuracy inspection
Inspection items
The straight line of the cradle in the vertical
plane when the worktable moves
The inclination of the cradle when the worktable moves
Maximum workpiece length
≤1000
0.03/1000
0.04/1000
Maximum workpiece length
≤1000
0.03/1000
0.04/1000
Inspection tools
Level
Level
Inspection method
Refer to the relevant provisions of JB2670
5.2.1.2.2.1
Put a bridge board in the middle of the cradle, and put a level on the bridge board parallel to the moving direction of the workbench. Move the workbench and inspect at three positions at both ends and in the middle.
The error is measured by the maximum algebraic
difference of the level reading
5.4.1.2.7
Put a bridge board in the middle of the cradle, and put a level on the bridge board perpendicular to the moving direction of the workbench. Move the workbench and inspect at three positions, at both ends and in the middle.
The error is measured by the maximum algebraic
difference of the level reading
JB/T2999.2-
Inspection items
Parallelism of the tailstock guide surface to the workbench movement
Axial play of the headstock spindle
For every 1000 length
For the entire length of the cradle
Maximum workpiece length||t t||≤1000
Inspection tools
Indicator
Special inspection rod
Inspection method
Refer to the relevant provisions of JB2670
5.4.2.2.1
Place the cradle at one extreme
position of the machine tool lift, fix the indicator so that the probe touches the upper surface a and the side surface b respectively, move the workbench, and inspect on the entire length of the cradle. Swing the cradle to the other extreme
position of the machine tool lift, and inspect again in the same way. Calculate the errors of a and b respectively, and the error is calculated by the maximum difference of the
indicator readings
5.6.2.2.1
Insert a special
inspection rod into the taper hole of the headstock spindle. Fix the indicator so that the probe touches the surface of the steel ball in the center hole of the special inspection rod. Turn the spindle for inspection. When the error is inspected with the maximum difference of the indicator reading, an axial force F specified by the manufacturer should be added through the spindle axis (no axial force is required for spindles that have eliminated axial clearance). JB/T2999.2- Inspection Items Radial runout of the axis of the taper hole of the headstock spindle: a Close to the spindle b. 150mm from the end of the spindle, the parallelism of the axis of the taper hole of the headstock spindle to the movement of the worktable a In the vertical plane b.In the horizontal plane, on the measuring length of 150, the inspection tool is the indicator, the inspection rod, the indicator, the inspection rod, the inspection method, and the reference to the relevant provisions of JB2670. Insert an inspection rod into the taper hole of the headstock spindle. Fix the indicator so that its probe touches the surface of the inspection rod: a. Close to the spindle end: b. 150mm from the spindle end. Turn the spindle to inspect. Pull out the inspection rod, turn it 90° relative to the spindle taper hole, reinsert it into the taper hole, and inspect three times in sequence.
Calculate the errors of a and b separately, and the error is calculated as the average of the four readings of the
indicator|||5.4.1.2.1;5.4.2.2.3
Insert a test
rod into the taper hole of the headstock spindle. Fix the indicator so that its probe touches the surface of the test rod: a. In the vertical plane: b. In the horizontal plane. Move the workbench to check
Pull out the test rod, rotate
180° relative to the taper hole of the spindle, reinsert it into the taper hole, and check
again.
a, b errors are calculated separately, and the error is half of the algebraic sum of the two readings of the
indicator|
JB/T2999.2-
Inspection items
Parallelism of the axis of the taper
hole of the tailstock sleeve to the movement of the worktable
a. On the vertical plane
b. On the horizontal plane
Parallelism of the line connecting the topWww.bzxZ.net
tip of the headstock spindle and the center
tip of the tailstock sleeve to the movement of the worktable
：
a. In the vertical plane
b. In the horizontal plane
On the measuring length of 150
(only the tailstock height is allowed)
Inspection tools
Indicator
Inspection rod
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of JB2670
5.4.1.2.1; 5.4.2.2.3
Insert an inspection
rod into the tapered hole of the tailstock sleeve. Fix the indicator so that its probe touches the surface of the inspection rod: a. In the vertical plane; b. In the horizontal plane. Move the workbench to inspect
Pull out the inspection rod, rotate
180° relative to the tapered hole of the sleeve, reinsert it into the tapered hole, and inspect again.
ab errors are calculated separately, and the error is calculated as half of the algebraic sum of the two readings of the indicator
5.4.2.2.3
Put a test rod with a length of 0.8 times the maximum grinding length but not more than
1200mm between the head and tail racks. Fix the indicator
so that its probe touches the surface of the test rod: a. In the vertical plane: b. In the horizontal plane
. Move the workbench for inspection.
a, b errors are calculated separately, and the error is measured by the maximum difference of the indicator readings.
JB/T2999.2-
Inspection items
The runout of the end of the grinding wheel frame spindle:
aThe radial direction of the spindle centering cone surface
bThe axial movement of the spindle
The parallelism of the axis of the grinding wheel frame spindle to the movement of the worktable
aIn the vertical
plane
bIn the horizontal
(two places)
On the measuring length of 100 (the protruding end of the inspection sleeve is only allowed to deviate upwards)
Inspection tool
Indicator
|Indicator
Test sleeve
Test method
Refer to the relevant provisions of JB2670
5.6.2.2.2;5.6.2.2.1
Fix the indicator so that its probe directly touches: a. The two extreme
positions of the spindle cone surface; b. The steel ball surface
of the spindle center hole. Rotate the spindle for inspection.
Calculate the measurement error of each measurement separately, and the error
is calculated as the maximum difference of the indicator readings.
During the inspection, an axial force F specified by the
manufacturer should be added through the spindle axis (no force is required for the spindle whose axial clearance has been eliminated)
5.4.1.2.1;5.4.22.3| |tt||Install
the inspection sleeve on the centering cone of the grinding wheel spindle. Fix the indicator so that its probe touches the sleeve surface: a. in the vertical plane; b. in the horizontal plane. Move the workbench for inspection. Turn the spindle 180° and inspect again.
a and b errors are calculated separately, and the error is half of the algebraic sum of the two readings of the indicator
JB/T2999.2-
Inspection items
Verticality of grinding wheel frame movement to workbench movement
Repeatable positioning accuracy
a. Repeatable positioning accuracy of grinding wheel frame
when fast forward
b. Precision of grinding wheel frame
The repeat positioning accuracy of the cut-in feed is the maximum error of the indicator reading. The indicator is fixed on the grinding wheel frame so that the probe touches the other side of the angle ruler. Move the grinding wheel frame and inspect it over the full stroke. The error is the maximum difference of the indicator reading. Fix the indicator so that the probe touches the grinding wheel frame housing in the horizontal plane of the grinding wheel spindle axis.
a Rapidly introduce the grinding wheel frame, and test it for six consecutive times;
b Fine cutting into the feed speed to introduce the grinding wheel frame, and test it for six consecutive times.
The error is the maximum difference of the indicator reading
JB/T2999.2-
6 Working accuracy inspection
Test piece diameter: D~(1/51/2)D
Test piece length: L'~1/2L
Test piece material: 45 steel, hardened, C48
Note: D is the maximum workpiece rotation diameter, L is the maximum workpiece length Inspection properties
Grinding center
Interval test piece, at least including feed,
displacement One center cam for each cam. Cutting conditions. No centering required. Inspection items. The parallelism of the cam nut to the rotating axis. Inspection tools. Micrometer. Refer to the relevant provisions of JB2670. 2.3.2.1:32.1;4.1. Use a micrometer to check the distance from the base circle generatrix to the generatrix at the maximum lift in the same longitudinal section of each cam.
Error is measured by the difference in micrometer readings
JB/T2999.2-
Mechanical industry standard
Camshaft grinder accuracy inspection
JB/T2999.21998
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of characters 2Q000
Format 880×1230
First printing in October 1998
First edition in October 1998
Print number 00,001-500
Cost 1000 yuan
98-153In the horizontal plane. Move the workbench to inspect. Pull out the inspection rod, rotate it 180° relative to the spindle taper hole, reinsert it into the taper hole, and inspect it again. Calculate the errors a and b separately, and the error is half of the algebraic sum of the two readings of the indicator. JB/T2999.2-Inspection Items Parallelism of the axis of the taper hole of the tailstock sleeve to the movement of the workbench a. In the vertical plane b. In the horizontal plane Parallelism of the line connecting the top of the headstock spindle and the center of the top of the tailstock sleeve to the movement of the workbench ：
a. In the vertical plane
b. In the horizontal plane
On the measuring length of 150
(only the tailstock height is allowed)
Inspection tools
Indicator
Inspection rod
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of JB2670
5.4.1.2.1; 5.4.2.2.3
Insert an inspection
rod into the tapered hole of the tailstock sleeve. Fix the indicator so that its probe touches the surface of the inspection rod: a. In the vertical plane; b. In the horizontal plane. Move the workbench to inspect
Pull out the inspection rod, rotate
180° relative to the tapered hole of the sleeve, reinsert it into the tapered hole, and inspect again.
ab errors are calculated separately, and the error is calculated as half of the algebraic sum of the two readings of the indicator
5.4.2.2.3
Put a test rod with a length of 0.8 times the maximum grinding length but not more than
1200mm between the head and tail racks. Fix the indicator
so that its probe touches the surface of the test rod: a. In the vertical plane: b. In the horizontal plane
. Move the workbench for inspection.
a, b errors are calculated separately, and the error is measured by the maximum difference of the indicator readings.
JB/T2999.2-
Inspection items
The runout of the end of the grinding wheel frame spindle:
aThe radial direction of the spindle centering cone surface
bThe axial movement of the spindle
The parallelism of the axis of the grinding wheel frame spindle to the movement of the worktable
aIn the vertical
plane
bIn the horizontal
(two places)
On the measuring length of 100 (the protruding end of the inspection sleeve is only allowed to deviate upwards)
Inspection tool
Indicator
|Indicator
Test sleeve
Test method
Refer to the relevant provisions of JB2670
5.6.2.2.2;5.6.2.2.1
Fix the indicator so that its probe directly touches: a. The two extreme
positions of the spindle cone surface; b. The steel ball surface
of the spindle center hole. Rotate the spindle for inspection.
Calculate the measurement error of each measurement separately, and the error
is calculated as the maximum difference of the indicator readings.
During the inspection, an axial force F specified by the
manufacturer should be added through the spindle axis (no force is required for the spindle whose axial clearance has been eliminated)
5.4.1.2.1;5.4.22.3| |tt||Install
the inspection sleeve on the centering cone of the grinding wheel spindle. Fix the indicator so that its probe touches the sleeve surface: a. in the vertical plane; b. in the horizontal plane. Move the workbench for inspection. Turn the spindle 180° and inspect again.
a and b errors are calculated separately, and the error is half of the algebraic sum of the two readings of the indicator
JB/T2999.2-
Inspection items
Verticality of grinding wheel frame movement to workbench movement
Repeatable positioning accuracy
a. Repeatable positioning accuracy of grinding wheel frame
when fast forward
b. Precision of grinding wheel frame
The repeat positioning accuracy of the cut-in feed is the maximum error of the indicator reading. The indicator is fixed on the grinding wheel frame so that the probe touches the other side of the angle ruler. Move the grinding wheel frame and inspect it over the full stroke. The error is the maximum difference of the indicator reading. Fix the indicator so that the probe touches the grinding wheel frame housing in the horizontal plane of the grinding wheel spindle axis.
a Rapidly introduce the grinding wheel frame, and test it for six consecutive times;
b Fine cutting into the feed speed to introduce the grinding wheel frame, and test it for six consecutive times.
The error is the maximum difference of the indicator reading
JB/T2999.2-
6 Working accuracy inspection
Test piece diameter: D~(1/51/2)D
Test piece length: L'~1/2L
Test piece material: 45 steel, hardened, C48
Note: D is the maximum workpiece rotation diameter, L is the maximum workpiece length Inspection properties
Grinding center
Interval test piece, at least including feed,
displacement One center cam for each cam. Cutting conditions. No centering required. Inspection items. The parallelism of the cam nut to the rotating axis. Inspection tools. Micrometer. Refer to the relevant provisions of JB2670. 2.3.2.1:32.1;4.1. Use a micrometer to check the distance from the base circle generatrix to the generatrix at the maximum lift in the same longitudinal section of each cam.
Error is measured by the difference in micrometer readings
JB/T2999.2-
Mechanical industry standard
Camshaft grinder accuracy inspection
JB/T2999.21998
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of characters 2Q000
Format 880×1230
First printing in October 1998
First edition in October 1998
Print number 00,001-500
Cost 1000 yuan
98-153In the horizontal plane. Move the workbench to inspect. Pull out the inspection rod, rotate it 180° relative to the spindle taper hole, reinsert it into the taper hole, and inspect it again. Calculate the errors a and b separately, and the error is half of the algebraic sum of the two readings of the indicator. JB/T2999.2-Inspection Items Parallelism of the axis of the taper hole of the tailstock sleeve to the movement of the workbench a. In the vertical plane b. In the horizontal plane Parallelism of the line connecting the top of the headstock spindle and the center of the top of the tailstock sleeve to the movement of the workbench ：
a. In the vertical plane
b. In the horizontal plane
On the measuring length of 150
(only the tailstock height is allowed)
Inspection tools
Indicator
Inspection rod
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of JB2670
5.4.1.2.1; 5.4.2.2.3
Insert an inspection
rod into the tapered hole of the tailstock sleeve. Fix the indicator so that its probe touches the surface of the inspection rod: a. In the vertical plane; b. In the horizontal plane. Move the workbench to inspect
Pull out the inspection rod, rotate
180° relative to the tapered hole of the sleeve, reinsert it into the tapered hole, and inspect again.
ab errors are calculated separately, and the error is calculated as half of the algebraic sum of the two readings of the indicator
5.4.2.2.3
Put a test rod with a length of 0.8 times the maximum grinding length but not more than
1200mm between the head and tail racks. Fix the indicator
so that its probe touches the surface of the test rod: a. In the vertical plane: b. In the horizontal plane
. Move the workbench for inspection.
a, b errors are calculated separately, and the error is measured by the maximum difference of the indicator readings.
JB/T2999.2-
Inspection items
The runout of the end of the grinding wheel frame spindle:
aThe radial direction of the spindle centering cone surface
bThe axial movement of the spindle
The parallelism of the axis of the grinding wheel frame spindle to the movement of the worktable
aIn the vertical
plane
bIn the horizontal
(two places)
On the measuring length of 100 (the protruding end of the inspection sleeve is only allowed to deviate upwards)
Inspection tool
Indicator
|Indicator
Test sleeve
Test method
Refer to the relevant provisions of JB2670
5.6.2.2.2;5.6.2.2.1
Fix the indicator so that its probe directly touches: a. The two extreme
positions of the spindle cone surface; b. The steel ball surface
of the spindle center hole. Rotate the spindle for inspection.
Calculate the measurement error of each measurement separately, and the error
is calculated as the maximum difference of the indicator readings.
During the inspection, an axial force F specified by the
manufacturer should be added through the spindle axis (no force is required for the spindle whose axial clearance has been eliminated)
5.4.1.2.1;5.4.22.3| |tt||Install
the inspection sleeve on the centering cone of the grinding wheel spindle. Fix the indicator so that its probe touches the sleeve surface: a. in the vertical plane; b. in the horizontal plane. Move the workbench for inspection. Turn the spindle 180° and inspect again.
a and b errors are calculated separately, and the error is half of the algebraic sum of the two readings of the indicator
JB/T2999.2-
Inspection items
Verticality of grinding wheel frame movement to workbench movement
Repeatable positioning accuracy
a. Repeatable positioning accuracy of grinding wheel frame
when fast forward
b. Precision of grinding wheel frame
The repeat positioning accuracy of the cut-in feed is the maximum error of the indicator reading. The indicator is fixed on the grinding wheel frame so that the probe touches the other side of the angle ruler. Move the grinding wheel frame and inspect it over the full stroke. The error is the maximum difference of the indicator reading. Fix the indicator so that the probe touches the grinding wheel frame housing in the horizontal plane of the grinding wheel spindle axis.
a Rapidly introduce the grinding wheel frame, and test it for six consecutive times;
b Fine cutting into the feed speed to introduce the grinding wheel frame, and test it for six consecutive times.
The error is the maximum difference of the indicator reading
JB/T2999.2-
6 Working accuracy inspection
Test piece diameter: D~(1/51/2)D
Test piece length: L'~1/2L
Test piece material: 45 steel, hardened, C48
Note: D is the maximum workpiece rotation diameter, L is the maximum workpiece length Inspection properties
Grinding center
Interval test piece, at least including feed,
displacement One center cam for each cam. Cutting conditions. No centering required. Inspection items. The parallelism of the cam nut to the rotating axis. Inspection tools. Micrometer. Refer to the relevant provisions of JB2670. 2.3.2.1:32.1;4.1. Use a micrometer to check the distance from the base circle generatrix to the generatrix at the maximum lift in the same longitudinal section of each cam.
Error is measured by the difference in micrometer readings
JB/T2999.2-
Mechanical industry standard
Camshaft grinder accuracy inspection
JB/T2999.21998
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of characters 2Q000
Format 880×1230
First printing in October 1998
First edition in October 1998
Print number 00,001-500
Cost 1000 yuan
98-1538 times, but not more than
1200mm test rod. Fix the indicator
so that its probe touches the surface of the test rod: a. in the vertical plane; b. in the horizontal plane
. Mobile workbench inspection.
a, b errors are calculated separately, and the error is measured by the maximum difference of the indicator readings.
JB/T2999.2-
Inspection items
The runout of the end of the grinding wheel frame spindle:
aThe radial direction of the spindle centering cone surface
bThe axial movement of the spindle
The parallelism of the axis of the grinding wheel frame spindle to the movement of the worktable
aIn the vertical
plane
bIn the horizontal
(two places)
On the measuring length of 100 (the protruding end of the inspection sleeve is only allowed to deviate upwards)
Inspection tool
Indicator
|Indicator
Test sleeve
Test method
Refer to the relevant provisions of JB2670
5.6.2.2.2;5.6.2.2.1
Fix the indicator so that its probe directly touches: a. The two extreme
positions of the spindle cone surface; b. The steel ball surface
of the spindle center hole. Rotate the spindle for inspection.
Calculate the measurement error of each measurement separately, and the error
is calculated as the maximum difference of the indicator readings.
During the inspection, an axial force F specified by the
manufacturer should be added through the spindle axis (no force is required for the spindle whose axial clearance has been eliminated)
5.4.1.2.1;5.4.22.3| |tt||Install
the inspection sleeve on the centering cone of the grinding wheel spindle. Fix the indicator so that its probe touches the sleeve surface: a. in the vertical plane; b. in the horizontal plane. Move the workbench for inspection. Turn the spindle 180° and inspect again.
a and b errors are calculated separately, and the error is half of the algebraic sum of the two readings of the indicator
JB/T2999.2-
Inspection items
Verticality of grinding wheel frame movement to workbench movement
Repeatable positioning accuracy
a. Repeatable positioning accuracy of grinding wheel frame
when fast forward
b. Precision of grinding wheel frame
The repeat positioning accuracy of the cut-in feed is the maximum error of the indicator reading. The indicator is fixed on the grinding wheel frame so that the probe touches the other side of the angle ruler. Move the grinding wheel frame and inspect it over the full stroke. The error is the maximum difference of the indicator reading. Fix the indicator so that the probe touches the grinding wheel frame housing in the horizontal plane of the grinding wheel spindle axis.
a Rapidly introduce the grinding wheel frame, and test it for six consecutive times;
b Fine cutting into the feed speed to introduce the grinding wheel frame, and test it for six consecutive times.
The error is the maximum difference of the indicator reading
JB/T2999.2-
6 Working accuracy inspection
Test piece diameter: D~(1/51/2)D
Test piece length: L'~1/2L
Test piece material: 45 steel, hardened, C48
Note: D is the maximum workpiece rotation diameter, L is the maximum workpiece length Inspection properties
Grinding center
Interval test piece, at least including feed,
displacement One center cam for each cam. Cutting conditions. No centering required. Inspection items. The parallelism of the cam nut to the rotating axis. Inspection tools. Micrometer. Refer to the relevant provisions of JB2670. 2.3.2.1:32.1;4.1. Use a micrometer to check the distance from the base circle generatrix to the generatrix at the maximum lift in the same longitudinal section of each cam.
Error is measured by the difference in micrometer readings
JB/T2999.2-
Mechanical industry standard
Camshaft grinder accuracy inspection
JB/T2999.21998
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of characters 2Q000
Format 880×1230
First printing in October 1998
First edition in October 1998
Print number 00,001-500
Cost 1000 yuan
98-1538 times, but not more than
1200mm test rod. Fix the indicator
so that its probe touches the surface of the test rod: a. in the vertical plane; b. in the horizontal plane
. Mobile workbench inspection.
a, b errors are calculated separately, and the error is measured by the maximum difference of the indicator readings.
JB/T2999.2-
Inspection items
The runout of the end of the grinding wheel frame spindle:
aThe radial direction of the spindle centering cone surface
bThe axial movement of the spindle
The parallelism of the axis of the grinding wheel frame spindle to the movement of the worktable
aIn the vertical
plane
bIn the horizontal
(two places)
On the measuring length of 100 (the protruding end of the inspection sleeve is only allowed to deviate upwards)
Inspection tool
Indicator
|Indicator
Test sleeve
Test method
Refer to the relevant provisions of JB2670
5.6.2.2.2;5.6.2.2.1
Fix the indicator so that its probe directly touches: a. The two extreme
positions of the spindle cone surface; b. The steel ball surface
of the spindle center hole. Rotate the spindle for inspection.
Calculate the measurement error of each measurement separately, and the error
is calculated as the maximum difference of the indicator readings.
During the inspection, an axial force F specified by the
manufacturer should be added through the spindle axis (no force is required for the spindle whose axial clearance has been eliminated)
5.4.1.2.1;5.4.22.3| |tt||Install
the inspection sleeve on the centering cone of the grinding wheel spindle. Fix the indicator so that its probe touches the sleeve surface: a. in the vertical plane; b. in the horizontal plane. Move the workbench for inspection. Turn the spindle 180° and inspect again.
a and b errors are calculated separately, and the error is half of the algebraic sum of the two readings of the indicator
JB/T2999.2-
Inspection items
Verticality of grinding wheel frame movement to workbench movement
Repeatable positioning accuracy
a. Repeatable positioning accuracy of grinding wheel frame
when fast forward
b. Precision of grinding wheel frame
The repeat positioning accuracy of the cut-in feed is the maximum error of the indicator reading. The indicator is fixed on the grinding wheel frame so that the probe touches the other side of the angle ruler. Move the grinding wheel frame and inspect it over the full stroke. The error is the maximum difference of the indicator reading. Fix the indicator so that the probe touches the grinding wheel frame housing in the horizontal plane of the grinding wheel spindle axis.
a Rapidly introduce the grinding wheel frame, and test it for six consecutive times;
b Fine cutting into the feed speed to introduce the grinding wheel frame, and test it for six consecutive times.
The error is the maximum difference of the indicator reading
JB/T2999.2-
6 Working accuracy inspection
Test piece diameter: D~(1/51/2)D
Test piece length: L'~1/2L
Test piece material: 45 steel, hardened, C48
Note: D is the maximum workpiece rotation diameter, L is the maximum workpiece length Inspection properties
Grinding center
Interval test piece, at least including feed,
displacement One center cam for each cam. Cutting conditions. No centering required. Inspection items. The parallelism of the cam nut to the rotating axis. Inspection tools. Micrometer. Refer to the relevant provisions of JB2670. 2.3.2.1:32.1;4.1. Use a micrometer to check the distance from the base circle generatrix to the generatrix at the maximum lift in the same longitudinal section of each cam.
Error is measured by the difference in micrometer readings
JB/T2999.2-
Mechanical industry standard
Camshaft grinder accuracy inspection
JB/T2999.21998
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of characters 2Q000
Format 880×1230
First printing in October 1998
First edition in October 1998
Print number 00,001-500
Cost 1000 yuan
98-1532-
6 Working accuracy inspection
Test piece diameter: D~(1/51/2)D
Test piece length: L'~1/2L
Test piece material: 45 steel, hardened, C48
Note: D is the maximum workpiece rotation diameter, L is the maximum workpiece length. Inspection properties
Grinding center
Test piece, at least one each for the infeed and
row eccentric cams
tt
tt
tt
tt
tt
tt
tt
tt
tt
tt
tt
tt
tt ||Cutting conditions
Not used
Inspection items
The planeness of the cam nut to the rotation axis
Inspection tools
Micrometer
Refer to the relevant provisions of JB2670
2.3.2.1:32.1;4.1
Use a micrometer to check the distance from the base circle generatrix to the generatrix at the maximum lift in the same longitudinal section of each cam.
Error is measured by the difference in micrometer readings
JB/T2999.2-
Mechanical industry standard
Camshaft grinder accuracy inspection
JB/T2999.21998
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of characters 2Q000
Format 880×1230
First printing in October 1998
First edition in October 1998
Print number 00,001-500
Cost 1000 yuan
98-1532-
6 Working accuracy inspection
Test piece diameter: D~(1/51/2)D
Test piece length: L'~1/2L
Test piece material: 45 steel, hardened, C48
Note: D is the maximum workpiece rotation diameter, L is the maximum workpiece length. Inspection properties
Grinding center
Test piece, at least one each for the infeed and
row eccentric cams
tt
tt
tt
tt
tt
tt
tt
tt
tt
tt
tt
tt
tt ||Cutting conditions
Not used
Inspection items
The planeness of the cam nut to the rotation axis
Inspection tools
Micrometer
Refer to the relevant provisions of JB2670
2.3.2.1:32.1;4.1
Use a micrometer to check the distance from the base circle generatrix to the generatrix at the maximum lift in the same longitudinal section of each cam.
Error is measured by the difference in micrometer readings
JB/T2999.2-
Mechanical industry standard
Camshaft grinder accuracy inspection
JB/T2999.21998
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 100044)*
Sheet 3/4 Number of characters 2Q000
Format 880×1230
First printing in October 1998
First edition in October 1998
Print number 00,001-500
Cost 1000 yuan
98-153
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