JB/T 10007-1999 This standard is a revision of ZB J42 004-87 "Large Outside Diameter Micrometer (Measuring Range 1000mm to 3000mm)". During the revision, only the editorial modification was made according to the relevant regulations, and the main technical content remained unchanged. This standard specifies the type and size, technical requirements, marking and packaging of large outside diameter micrometers. This standard is applicable to large outside diameter micrometers with a graduation value of 0.01mm, a micrometer screw pitch of 0.5mm or 1mm, a range of 25mm or 50mm, and a measuring range of 1000 to 3000mm. This standard was first issued in 1987. JB/T 10007-1999 Large Outside Diameter Micrometer (Measuring Range 1000mm to 3000mm) JB/T10007-1999 Standard Download Decompression Password: www.bzxz.net

[CS 23.060.20
Machinery Industry Standard of the People's Republic of China
1B/T10007-—1999
Large External Micrometer
Measuring Range 1000~3000mm
Large External Micrometer
1999-05-20 Issued
State Machinery Industry Bureau
2000-01-01 Implementation
R/T1007-1999bZxz.net
This standard is revised on the basis of 2BJ42004-87 Large Outside Micrometer (Measurement Range 1000mm to 3000m3) This standard is consistent with the technical content of ZBJ42004-87, and only the relevant provisions are re-edited. Appendix A of this standard is the appendix of the standard.
This standard replaces the technical standard 2B142H4-87 from the date of implementation. The responsible drafting unit of this standard is: Yuerbin Jiqi Cutting Tool Factory. The participating drafting units of this standard are: Jimeifeng Cutting Tool Factory, Central Ministry of Cutting Tool Factory, Beijing Second Plate Factory. The main drafters of this standard are: Hechuan, Diqiu, Li Jinghua, Xu, Li. This standard was first issued in 19B?
Machinery Industry Standard of the People's Republic of China
Large Outside Diameter Micrometer
(Measuring Range 1000~3000mm]
Large outside diameter micrometer Micrometer
Technical standard specifies the type and size, technical requirements, marking and packaging of micrometers. JB/T10007-1999
1424:87
Not applicable to the standard + The graduation value is 0.01mm, the pitch of the micrometer screw is 0.5mm or 1mm, the cover distance is 25mm or 50mm, and the pressure measuring range is 1000~3000mm. Micrometer (hereinafter referred to as micrometer) Reference standard
The provisions contained in the underlined standard are included in this standard by citing All the provisions of this standard shall become the provisions of this standard. When this standard is published, the test details shown are valid. All standards will be revised. In order to use this standard, the parties concerned shall discuss the possibility of using the latest version of the standard underlined. GE/T1219-1985 Vernier
3 Definitions
This standard adopts the following definitions.
3.1 Large outside diameter T-meter
An outside diameter measuring instrument that uses the principle of explosion-proof and reads the distance between two independent measuring surfaces on the center frame. Its graduation value is 0.01mm, and the lower limit of the measuring disk is equal to or greater than 1000mm. 3.1 Indication error
The difference between the scale indication value and the actual distance between the two measuring disks. 3.3 Movement deviation of the micrometer
The difference between the highest point and the lowest point on the vertical coordinate on the indication error curve obtained when the micrometer is used for full range. 4 Type and size
4.1 The measuring brick is a large centrifugal type as shown in Figure 1 (the figure is only for illustration and does not represent the detailed structure). The measuring range is as follows: 100-120mm, 120~1400mm1, 14~160amm, 1600~180(mm, 18 00~2000mm, 2000~2200mm2200-240mm, 2400260mm, 2600-2800mm: 28(0~3000mm4.2 The large micrometer with dial is shown in Figure 2 (the diagram is for illustration only and does not show the detailed structure). The measuring range is: 1000--1500mh, 1500-2000rmm, 2000-2500mm, 250030mQmm, 4.3 The scale numbers of the fixed tube of the underground micrometer shall be in accordance with the provisions of the table unless otherwise specified. 4.4 The diameter of the measuring disc end of the micrometer frequency rod and the measuring code shall be 8mm4.5 The large micrometer shall have a force measuring device, a heating device and a tightening device for tightening the micrometer screw. Approved by the Bureau of Household Machinery and Fuel Industry on May 20, 1999, implemented on January 1, 2000, quality assurance, JB/T[0007—1999], product quality assurance, 5 technical requirements, 5.1 The meter shall not have external defects that may affect its usability.
due to fixed position
new purple
need to change the rod
other digital markings
0,5,10.15,20,25
0.10,20.30,40,50
5.1 The movement of the micrometer micro screw should be smooth and flexible, without sticking, and the axial clearance should not be greater than 0.01mm-5.3 There should be no obvious deviation between the two measuring blood of the large micrometer. 5.4 The width of the longitudinal scale of the fixed sleeve and the scale on the differential cylinder should be 0.15-0.2mm, and the difference in scale width should not be less than 0.03mm: ≤, 5 greater than the zero position of the micrometer, the allowable height of the fixed sleeve thorn line of the differential cylinder should not be greater than 0.05mm. Offline value is not more than 0.10mm
5.6 The distance between the large micrometer value and the full differential calibration edge should not be less than 0.40mm2
JH/E10007-1999
5.7 The elasticity of the large micrometer measuring surface should not be less than 76GHV (2HRC) 5.8 The surface value of the large measuring surface is 0.m
5. The large micrometer measures the base surface ball and connects The measuring force should be 8~12N, the change of measuring force should not exceed 2N, and the flatness tolerance of the large scale is m
5.11 The movement deviation of the measuring head of the large micrometer within the 25mm measuring range should not exceed 3m: The movement deviation within the 50mm range should exceed
5.12 The indication error of the large micrometer, the alignment of the two measuring surfaces and the deformation of the center frame when subjected to a force of 12N along the axis of the micrometer screw , the degree is not greater than the provisions of Table 2, the brick is adjustable, the large scale is the measuring base with table, 10K-1200, 1200-1400, 1400-1600, EG00--E&00, 18(024300, 2000-- 220D
220D-2400
2400-2500
2500-2.R0M
2801-3000
100D--150D
.1500-2000
2000-2500
2500-3000
Indication||tt| |Parallelism of two measuring surfaces
5.13 The large micrometer should be equipped with a zero adjustment tool and a calibration rod. The calibration rod size deviation is shown in Table 3. 5.14 The hardness of the calibration measuring rod should not be less than 766HV (=62HRC). The surface roughness R of the measuring rod of Jiao Liu 1 is 0.04μm, 5.15
5.16 The technical requirements for the half-micrometer of the first type should be increased. 5.16. The deformation range of the self-test meter should be 0~10mm, and its technical requirements should comply with the requirements of B/T1219. 5.16.2 The test meter should be reliable during installation, and it is recommended to install a protective meter cover. 5.16.3 When the test meter is installed, its pre-shrinkage should not be less than 0.5mm. S.16.4 The contact between the test meter and the movable test meter should be reliable. During dynamic measurement, the measuring rod of the dial indicator should move smoothly and flexibly. There should be no jamming or loosening.
5.16, 5 The measuring rod of the dial indicator should be placed in the same direction as the measuring station.
J8/T10037-1999
Civilian elimination difference
Measurement and measurement.
2 Compare with the recording system; there should be inspection, and there should be a heat type, 6 Marking and packaging||tt ||6.1 The scale should be marked with:
a) manufacturer's name or trademark:
measurement range:
c) measurement value:
d) product serial number,
6.2 The calibration plate should be marked with the nominal size, 6.3 The packaging box of the scale should be marked with:
a) manufacturer's name or trademark:
b) product name:
c) measurement range.
Nominal size
2121.2175
205,
2625, 2675.
Size difference
.4 The scale should be rust-proofed before packaging and must be packed properly. The product must not be damaged during transportation due to poor packaging, 6.5. The large micrometers that meet the requirements of this standard shall be accompanied by a product certificate; the product certificate shall be marked with the standard number, product serial number and publication date of this standard.
JB/T10007-1999
Appendix A
(Standard Appendix)
Inspection method of large micrometers
This appendix is ​​about the test method of large micrometers for factory inspection. A1. Moving deviation of micrometer head
Tighten the micrometer head to the clamp or the flat electrode at random, and install a temporary fixed anvil of suitable length and a fourth measuring surface close to the measuring surface of the screw, and then use a set of 1st grade (4th grade) disc blocks of the size series listed in Table A1 for inspection. AI
micrometer head
small series
35, 31., 7.7, 10.3#[29.15.17.6.20.2.22.8, 252.5, 7.7.12.9, 17.6.22.8, 30.1, 35.3.40.45.2, 50 beats
According to the difference between the indication value of the indicating mechanism of each inspected point and the actual size of the gauge block, the indication error curve is drawn, and the difference between the vertical coordinate of the highest point and the most arbitrary point of the curve is obtained.
A2 indication error
The indication error of the large micrometer can be checked with an inner diameter scale or a calibration plate rod. During the inspection, first align the calibration rod or inner diameter micrometer with the lower limit (or upper limit) position of the micrometer head, then turn the differential to the upper limit (or lower limit) position of the micrometer head, and use the inner diameter micrometer or calibration rod that has been calibrated for the second time to check the indication at the upper limit (or lower limit) of the micrometer head. The difference between the indication value on the micrometer head and the actual size of the inner diameter micrometer or calibration rod is the indication error of the large micrometer. This inspection should be carried out at least at the upper and lower limits of the large micrometer. If the large micrometer is equipped with a dial, the dial and the probe should be aligned at the same time when aligning. During the inspection, the micrometer head is placed to the nominal size and the indication difference is read on the dial.
A3 Deformation of the ruler frame when subjected to 12N force
After fixing one end of the large scale ruler, use a special measuring rod to zero (including the influence of the weight of the measuring rod on the ruler frame) and then read the value on the dial indicator (the measuring station is with a meter) or micrometer head (the measuring station is a required type) on the measuring end, and then convert the deformation value of the ruler frame when subjected to 12N force.
A4 Axial spacing and radial spacing
A4.1 is used to sense the axial clearance. If there is any objection, the axial clearance value is measured on the special inspection. A4.2 is used to sense the radial clearance. If there is any objection, the radial clearance value is measured on the special inspection at a distance of 10mm from the inner end face of the ruler frame.
A5 Measuring force and measuring force change
refers to the change in the measuring force and measuring angle of the micrometer measured on the special dynamometer for micrometers. A6 Measuring surface hardness should be measured at the smooth part of the surface that is closer to the measuring surface. For elastic alloy surfaces, this test can be exempted. A Deflection of the two measuring surfaces
Put the micrometer frame flat on an adjustable support frame on the platform, adjust the support frame so that the auxiliary line of the extended part of the micrometer is parallel to the horizontal plane, and measure the distance between the micrometer and the measuring platform respectively. The difference between the two distances is the horizontal position deviation. Then rotate the micrometer frame by 9 around the axis of the micrometer screw to make the frame and the plane parallel. According to the above steps, measure the vertical position of the frame by 3. The deviation of the two measuring surfaces is calculated by formula [A1]5. -(ax)2+ (5,)2
（AI)
The measuring range is 1000~2000mm. The difference between the two measuring surfaces should not exceed 1.5mm. The measuring range is 20u0-300mm. The deviation between the two measuring surfaces should not exceed 2.0mm. A8 The parallelism of the two measuring objects
is tested by a special tester. This test should be carried out at least near the upper and lower limits of the measuring range.
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