JB/T 7982-1999 JB/T 7982-1999 Tool Presetting Measuring Instrument Accuracy JB/T7982-1999 Standard Download Decompression Password: www.bzxz.net

ICS25.060.20
Standard of the Machinery Industry of the People's Republic of China
JB/T7982-1999
Accuracy of the tool presetting instrument Issued on 1999-05-20
National Bureau of Machinery Industry
Implementation on 2000-01-01
JB/T7982-1999
This standard is revised on the basis of JB/T7982-95 "Accuracy of the tool presetting instrument". The technical content of this standard is consistent with that of JB/T7982-95, and it has only been re-edited according to relevant regulations. Appendix A of this standard is a reminder appendix.
This standard replaces JB/T7982-95 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Measuring Tools and Instruments. The responsible drafting unit of this standard: Chengdu Tool Research Institute. The main drafter of this standard is Han Chunyang.
This standard was first issued in 1989 as GB10921-89 and was adjusted to JB/T7982-95 in April 1996. 2
Mechanical Industry Standard of the People's Republic of China
Aceuracy of the tool presetting instrument
Aceuracy of the tool presetting instrument This standard specifies the accuracy of the tool presetting instrument and its inspection method. JB/T7982-1999
Replaces JB/T 7982-95
This standard applies to the tool presetting instrument for measuring the cutting edge coordinate position of the tool for CNC machine tools and machining centers outside the machine. 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 parties using this standard should explore the possibility of using the latest version of the following standards. GB/T1800.3--1998 Tolerances and fit basis Part 3: Standard tolerances and basic deviations Table 3 Accuracy
The accuracy of tool presetting measuring instrument is shown in Table 1.
Spindle taper and instrument calibration tree accuracy
Spindle axial runout
Special spindle radial runout
Parallelism of the axial movement direction of the calibration device to the spindle axis (or the positioning base of the tool holder seat)
Verticality of the radial movement direction of the calibration device to the spindle axis (or the positioning base of the tool holder seat)
Instrument measurement system accuracy
Instrument indication error
Instrument indication variability
Dimensional error
Shape error
Axial within 300 range||t t||Any 300 range
Any 150 range
Any 150 range in the direction
Any 300 range in the axial direction
Precision grade
±AT3/2
AT3 (AT, value)/3
±AI4/2
AT4 (AT, fish)/3
±112/2
AT3, AT4 are the 3rd and 4th grade chain angle tolerances in ISO1947, and their values ​​are shown in Table AI in Appendix A (Suggestive Appendix). 2IT5 and IT7 are the 5th and 7th grade standard tolerances in GB/T1800.3, and their values ​​and instrument indication errors are shown in Table A2 in Appendix A. Approved by the State Bureau of Machinery Industry on May 20, 1999 and implemented on January 1, 2000
Test methods
JB/T7982-1999
4.1 The test should be carried out under the working conditions specified by various tool preset measuring instruments. 4.2 See Table 2 for test items, test methods and test tools. Table 2
Test items
Spindle taper hole and calibration taper shank accuracy
Spindle axial runout
Spindle radial runout
Parallelism of the axial movement direction of the aiming device to the spindle axis (or the positioning base surface of the tool holder seat)
Radial movement direction of the aiming device to the spindle axis
|Line (changing knife to seat
positioning base surface) multiplied by straightness
Instrument measurement system
Accuracy
Instrument indication error
Instrument indication variability
Inspection method
When inspected by color coating method, the contact rate of the precision grade should be greater than 90% when the coating layer thickness is not greater than 1m; the contact rate of the ordinary grade should be greater than 85% when the coating layer thickness is not greater than 1.5μm. When inspected by other methods, the inspection accuracy should not be greater than 1/3 of the indicators of each inspected item. Install the inspection rod with a steel ball in the top center hole into the spindle taper hole, rotate the spindle for at least one circle, use the flat probe indicator to slide the spindle axis direction to measure the scene, and take the difference between the maximum and minimum readings of the indicator.
Install the inspection ladder into the spindle taper hole, rotate the spindle, and use the indicator to inspect any cross-section within the axial range of 300. Repeat the inspection at least 4 times, each time making the inspection ladder rotate 90° relative to the taper hole, and take the maximum value of each inspection.
Install the inspection ladder into the spindle taper hole, make the indicator and the aiming device move synchronously along the axial direction, and conduct in the a and b directions within the 300 range. Inspection, take the difference between the maximum and minimum readings of the indicator gauge. Alignment device
Spindle or tool magazine
Install the special inspection fixture into the spindle taper hole, make the indicator gauge and the aiming device move synchronously in the radial direction, and inspect within any 150 range, take the difference between the maximum and minimum readings of the indicator gauge. Aiming device
Spindle tool center seat
Following device
Inspect within any 150 range in radial direction and any 300 range in axial direction with a measuring system with an accuracy of no more than 0.002. Within the specified range, there shall be no less than 10 inspected points, and the distance between adjacent inspected points shall not be more than 20. Take peak-to-peak evaluation. Then, carry out inspection near the peak value. The number of inspection points shall not be less than 10, and the distance between adjacent inspection points shall not be greater than 0.01. Install the inspection rod into the spindle taper hole, measure the diameter and length of the inspection rod, and take the difference between the measured value and the actual value. Install the inspection rod into the spindle taper hole, and repeat the measurement of the true diameter and length of the inspection ladder no more than 5 times, and take the difference between the maximum and minimum values ​​of the measured values. mm. Inspection tool. 1-level circular dimension rat gauge. Or other inspection tools that meet the accuracy requirements. Inspection row, special inspection tool with a scale value of 0.001, and an indicator with a scale value of 0.001. The accuracy is not greater than 0.002. Inspection rules for measuring system JB/T7982-1999 5.1 The order of inspection items listed in Table 2 may not be used as the actual inspection order. The inspection order can be arranged according to the specific product during inspection. 5.2 For the inspection items listed in Table 2, except for the turning tool preset measuring instrument without shaft system, which does not need to carry out the three inspections of "spindle taper hole and calibration rod taper shank accuracy", "spindle axial runout" and "spindle radial runout", all other types of tool preset measuring instruments should be inspected according to the items listed in Table 2.
JB/T 7982—1999
Appendix A
(Suggestive Appendix)
Standard Tolerance Instrument Indication Error and Cone Angle Tolerance Values ​​See Table A1 for cone angle tolerance values.
Cone angle tolerance grade
Cone length L
>10-16
>16~25
>25~40
>40~63
>63~100
>100~160
>160~250
>250~400
>400~630
Angular value tolerance
Line value tolerance
See Table A2 for the numerical values ​​of standard tolerance and instrument indication error. Basic size
>80~120
>120~180
>180-250
>250-315
>315~400
>400~500
>500-630
>630-800
Standard tolerance
Tolerance grade
Instrument indication error
±IT5/3
Angular value tolerance
Standard tolerance
Tolerance grade
Line value tolerance
Instrument indication error
±IT7/3
±IT72
Basic size
>800~1000
>1000~1250bzxz.net
>1250~1600
>1600~2000
>2000~2500
>2500~3150
Standard tolerance
Tolerance grade
JB/T7982—1999
Table A2 (end)
Instrument indication error
±IT5/3
±IT5/2
Standard tolerance
Tolerance grade
Instrument indication error
±17/3
±IT7/2
± 105
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