This standard specifies the terms and definitions, types and basic parameters, requirements, inspection methods, marking and packaging of torsion spring comparators. This standard is applicable to torsion spring comparators with graduation values ​​of 0.1μm, 0.2μm, 0.5μm, 1μm, 2μm, 5μm, 10μm, indication range of ±30 scale graduation, ±60 scale graduation, ±100 scale graduation, and clamping sleeve diameter of 28mm. GB/T 4755-2004 Torsion Spring Comparator GB/T4755-2004 Standard download decompression password: www.bzxz.net

GB/T4755—20Q4
8-Torsion comparison
This standard is based on the 20093 torsion ratio standard of GB/T 4755- ... Modification 1: The allowable error of the graduation value of 0.2m plus C.= is changed to 0.15m; the allowable error of the graduation value of 0.5m is changed to =.25u1-the allowable error of the graduation value of rm is changed to ±u,4m: the allowable error of the graduation value of 2m is changed to Gm sample effect = m
the allowable error of the graduation value of 5u is 1.5m = 3Jm graduation value; the allowable coal error of 12 is changed to 12.5 to 3m, and the allowable coefficient of the division value of m for the grid and axial force Changes: from .5, C. to 1.0, the actual diameter of the scale will be changed from 28h7 to 23hs: - The diameter of the measurable matching part is changed from E to 7, and the adjustment required for the zero installation is changed from not less than 7 points to not less than 5 points: the scale mark and the width of the end of the scale are changed from C.5mm1~~3.25mm to C.1mm~0.2mrlz. The width of the scale mark is not greater than U.(S13m. This ball seat will be effective from the date of implementation. Replaces G47551S841 torque comparator 3. Compared with G7-19, the main changes of this standard are as follows: the definition of the comparator is changed (3.1 of the 1982 edition: 3.1 of this edition); the definition of the radial force indication is deleted (3.2 of the 1984 edition); the requirements for the appearance of the image are modified (3.1 of the 1984 edition: 3.1 of the technical edition); the requirements for the surface energy of the measuring head are modified (3.9 of the 1984 edition; 3.3 of this edition). 1); added the surface dependent list requirements of the second surface (3.3 of this edition); the requirements for the net size of the scale plate and the table (5,4.1.3..2, 5..3 of the car version); added: the requirements for the length of the scale mark (3, 1. of this edition); 1 Modification? The current value of the value change of the graduation of 19m is not changed (1R version 5.11 car version 5.: - Acceptance, except for the specified value of the smaller value error of the 184 edition 312, this edition 5.3 deleted the requirements for various types of labor comparison and reduction (3.15 of the 194 edition report: Added the door measurement method, measurement force change, indication change and indication variability inspection method compensation (3.1 to 6.3 of this edition, 5.5)；Test method is no longer included in the appendix: Appendix A of the 2004 edition: This edition is the S) of this edition. This standard is drafted by the China Machinery Industry Federation. The National Technical Committee for Standardization of Measuring Instruments (5AC/-C132) is responsible for drafting. The main drafter of the standard is Liu Qinmei, the manufacturer of the standard, and the previous version of the standard is: GB/T435-13A. GB/T4755-2004 This standard defines the technical definition, type and basic parameters, requirements, inspection methods, marking and packaging of torque comparators. The graduation value used in this standard is 0.1 m,0.2.3.=m13,2k,5口,10 3, indicated by 30 scale division, ±i scale division, =10 scale division, clamping set for zl twist comparator, 2 Normative references
The following documents are cited as the terms of this standard through this standard, and any subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, all parties to the reference standard should study whether to use the latest version of these documents. The latest version of the document without the date is applicable to this standard. 61? .53-1 Basic terms and definitions of measuring instruments
GB/T 71331 SS710 The following terms and definitions are used in this standard. 3.
Microcalor
Use the torsion element as the rotation and release code of the head size, and convert the linear displacement of the measuring rod into the angular displacement of the pointer on the dial, so that the dial can be selected to read the fine gauge. It is called a micrometer. 3.2
Free position traepluco
Indicates the position of the measuring instrument when it is in the free state. 4 Basic information of the type
4.1 The type
microcaloric comparator is shown in Figure 1 and Figure 2. The diagram is provided for medical use. The measuring rod
measurement head
CB/T4755—2004
4.2 The indication range of the microcaloric comparator is specified in Table 1: |5 Requirements
5.1 Appearance
+U scale scale
5C scale scale
±100 scale scale
The measuring surface of the measuring head and the sleeve should not have any defects that affect the use performance, such as corrosion, unevenness, and scratches: 5.2 Interaction
Under normal use, the movement of the torque comparator should be smooth and free of lag. 5.3 Measuring head, sleeve and measuring instrument
5.3.1 The measuring surface should be made of wear-resistant materials such as hard and rare materials, and its surface should be single! The hardness of the steel measuring head should not be less than +65IIV5.3.2 The comparator is equipped with a spherical measuring head. 5.3.3 The diameter of the optical sleeve of the comparator should be 28h8, and its surface roughness should be greater than U.4tL. 5.3.4 The thickness of the fiber and the through-hole of the measuring head should be 61?. 5.4
5.4.1 The scale should be marked with 5.1m or 5.m or 9.m or m10 points, and the scale should be marked with appropriate scales and differences. The scale should be clearly marked on the scale. 5.4.2
The scale should be marked with ", " and "" symbols. The scale should be clear and transparent, and the reading effect should be fast. The interval between scales should not be less than 0.7mm: the scale standard should be within the range of 0.1mm to 3.20m. The width error should be greater than 0.05m. The length of the scale should be less than the scale interval. Each scale mark should be a long scale mark, and each scale mark should have a scale mark. 5.5 When the pointer is in the middle position, the pointer should return to the same position as the scale mark. 5.5.1
5.5.2 There should be a shaped mark of not less than 5mm on the male end of the needle. The round mark and the tip of the pointer should be painted with a strong reflective blue color.
5.5.3 The pointer tip should be between 3u% and 81% of the scale mark length: the distance between the pointer and the wide disk surface should not be greater than 13m. 5.5.4
The height of the pointer during strong movement is greater than 9.5.5.5www.bzxz.net
5.5.6 The width of the finger action is within the range of n.1 mm to -1.5 mm. The difference between the width of the finger tip and the width of the dial scale mark should not be greater than 0.35 mm. mra:
5.6, 1 The torsion comparator has an adjustable zero position device, and its adjustment range should not be less than 5 scale points. 5.6.2 The torsion comparator should have a limit device to limit the travel. The measurement range of the torsion comparator and the actual measurement range of the torsion comparator are as follows: Table 2
points /
5. Daily indication value change
Measurement range
One scale point
Only the scale point
100 scale points
GB/T 4755—2004
Measurement value?N
Specific scale: 0 scale division: 13 scale division c.43
When a force is applied to the axis of the torsion measuring rod in the specified direction, the change in the indication between the applied force and the unapplied force should not exceed 3:
division/μm
5.9 Permissible change in indication value| |tt||The indication fee is equal to the soft position when measuring the single meaning and the vertical time. The allowable error and indication dynamics are not within the table (section). Table 4
is the allowable error to /um
position:
to 180 scale width,
0 to -33 scale division
0 one scale division,
0 year 0 scale division
on n 4n
room C you division quality
to one foot
minimum value variability
division value:
GB/I4755-:204
6 inspection method
6.1. Test temperature
: The torque comparison should be carried out at the same temperature as the factory. 2. Wait until the pointer of the comparison instrument is stable before testing.
6.2. Measuring force
: The torque comparison should be light and reliable. At the same time, the measuring force should be installed on the bone. The measurement should be calculated from the starting point (stop stroke> to the whole point). The small amount is taken as the small measuring force for comparison, and the maximum value is taken as the large measuring force for comparison. The difference between the maximum and minimum measured forces is taken as the measured force change of the next instrument. 6.3 Change in indication
The instrument can be tightened at the same time as the tester with good performance, and the pointer is adjusted to the zero position of the dial when the speed measurement is connected to the center of the workbench. Before the measurement, use a special force meter to apply force in the four directions relative to the original pull and torque in the four directions. tt||6.4 Allowable error
Place the calibration tool on the ground tightly and make it perpendicular to the working surface of the measuring disk. Then adjust the frequency indicator at the zero position; check the disk. At zero position, the inspection points must be marked ("square" and "square" according to the center of the loss 5. The inspection points are adjusted in detail with a certain size spacing. The maximum value of the blue between the inspection point relative to the nominal value is the full ratio of the calibration error, and 1 dispute is issued. It is determined that every 1 Each scale division is tested one by one. The indication error of the torque comparator with a division value of 1um is shown in Table 6. Table 5
2 Scale division
1 Scale division
4 Scale division
Starting position
, 1 numerical value.
6.5 Indication variability
Constant point (scale division)
+36, 39
+33, +66 32,5.
+0, . 60, +tor.2,
indication position recognition error "an
empty point 1 mark reverse scale)
display result
not suitable
will be compared with the instrument reliable model in the same better inspection table again, so that the common secretion of the actual and working self-measurement city measurement surface multiplied by the white gall: then, respectively, the pointer to the zero position, positive limit, 1 negative limit (a) and other three positions of the scale mark, the effective record measurement, to 1 time. Take the indication value plus a small indication compensation as the indication value variability of the comparison calibration, 7 marking and packaging
7.1 state reduction ratio instrument on the minimum mark:
2) manufacturing! or parts book mark:
) production number.
son.? The package must be marked with at least:) system! Or cup:
h, product name:
Range of indication:
d) Graduation value.
GB/T4755—2004
7.3 The control and manufacturing comparator should be protected and rotated before packaging. The internal gas should not be damaged during transportation. 7.4 The product should be marked with the standard number, product number and export certificate of this standard on the product after the qualified platform meets the requirements of the standard:
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