Some standard content:
National Metrology Verification Regulations of the People's Republic of China JJG93H—198
Tool Presetling Irstrumment
Issued on July 14, 1998
tImplementation on January 15, 1999
Issued by the State Administration of Quality and Technical Supervision
JJG938—1998
Verification Regilation of Tool Presetting Instrument
JJG:938-
This verification regulation was approved by the State Administration of Quality and Technical Supervision on July 14, 1998, and came into effect on January 15, 1999.
Responsible unit:
Drafting unit:
National Technical Committee for Geometry Engineering Parameters Measurement Heilongjiang Metrology Verification and Testing Institute
The drafting unit of the technical provisions of this regulation is responsible for the interpretation of the main drafters of this regulation:
Sun Xingfan
Sun Huanzhu
Participating drafters:
Zhou Zhiqiang
JJG93S—199R
(Heilongjiang Metrology Verification and Testing Institute Verification Items and Verification Conditions
Technical Requirements and Verification Methods
1 Processing of Verification Result and Verification Period
1 Verification Rod
Appendix 2 Special Gauges
JJG 938—1998
Appendix 3 Instrument Indication Error According to [T5:117 Standard Tolerance)
JJG 938—1998
Verification Procedure for Tool Presetting Residual Gauge
This procedure is applicable to the verification of tool presetting measuring instruments that are newly manufactured, in use and after conditioning. Overview
Tool presetting measuring instruments mainly use optical angle measurement projection screens to measure the angle and position of tools. Optical sensors determine the axial and lateral coordinates of tools. After calculation, the coordinate values can be displayed on the screen and the test results can be printed. According to the accuracy of the instrument, tool presetting measuring instruments are divided into two types: precision and ordinary. Tool presetting measuring instruments are mainly used to measure the cutting position of tools used in machine tools, machining centers and flexible manufacturing units, and check the angle, cutting angle and cutting edge of tools. According to the type, the instrument is divided into vertical and horizontal types. The appearance of the vertical tool presetting measuring instrument is shown in Figure 1. Figure
—Instrument sequence: 2-operating table: 3-spindle 4-alignment plate: 5-direction plate, 6-diameter slide plate: 7-screen: 8-light source: 9-computer: 10-workbench: 11-printer Calibration items and calibration conditions
1 The calibration items and main calibration tools of the tool presetting measuring instrument are listed in Table 1. Serial number!
Test items
Functions of computers, printers and accessories
Related functions of each part
Quality and cleanliness of field imagingbzxz.net
Perfectness of the two-point plate
Correctness of the magnification of the image
Alignment of the projection screen with the axis of the shaft
Angular angle of axial slide motion
Angular swing of radial slide motion
Spindle hole and standard cone
Radial runout of the shaft
Parallelism of the axial motion direction of the calibration device
Straightness of the radial motion direction of the calibration device
Indication error of the instrument
Variability of the indication of the instrument
Note: The symbol \+" in the table indicates that the item should be tested. 2
JJG939—1998
Standard glass scale
Working ball scale is used for calibration, 6 steel balls
Self-contained straight position dual frequency
Laser interferometer
1 grade round rust plate gauge
Calibration, torque meter component
Value is 0.0mm indicator
Pick up and replace the table or The value of the meter is 0.01m. Special inspection tools, machine cost meters or 0.001m meter calibration options, and frequency and optical instrument calibration options. The change can be changed.
In use
After repair
2 Inspection conditions
JJG 938—1998
2.1 The room temperature for calibrating precision tool adjustment measuring instruments is (20±5), and the time for the instrument to be tested to balance the temperature in the calibration room should be no less than 4 hours.
2.2 Before calibration, the instrument should be powered on for more than 2 hours: at the same time, the voltage change of the power supply should not exceed 10% of the rated voltage; the indoor relative humidity should not exceed % ：There is no movement that affects the verification. III Technical requirements and verification methods
3 Appearance
3.1 Requirements
3.1.1 The working surface of the instrument should be free of defects such as rust, bruises and obvious scratches: The coating or layer surface should be smooth, uniform, with consistent color, without spots, wrinkles, paint peeling or peeling. 3.1.2 The connecting wires, sockets, switches, signal lights and buttons should be complete and undamaged. 3.1.3 The instrument should be marked with the manufacturer's name (or "mark", instrument model and factory number. After the instrument is centered and cleaned, it is allowed to have appearance defects that cannot affect the accuracy. 3.2 Verification method
Visual observation:
4 All parts are used interchangeably
4.1 Requirements
The moving or moving parts of the instrument should move smoothly and reliably, without any looseness, resistance or jumping phenomenon: The fastening parts of the instrument should function reliably and without looseness; each limit device should work correctly and reliably: 4.2, Verification method
Visual observation and test.
5 The field of view should be like quality and cleaning process
5.1 Requirements
5.1.1 The surface of optical parts should not have obvious scratches, pitting, need points, etc., and the bonding surface of the glued parts should not have air pools and debonding.
5.1.2 The image in the field of view of the instrument should be clear and the lighting should be even. There should be no dust, water or oil stains that may affect the measurement. 5.2 Verification method
Visual observation.
6 Realignment of the graticule plate
6.1 Verification method
The angular graticule pole of the instrument field of view should coincide with the scale center of the graticule plate, and the error should not exceed two scale lines. 6.2 Verification method
Visual observation.
Verification method
7.1 Verification method
J.IG 938—1908
The error of the projection magnification is not more than 0.5: 7.2 Verification method
Use the standard scale with the verification limit error not exceeding +2m for verification. During verification, place the standard glass scale in the working position, adjust the scale lines of the standard glass scale to make the image clear: and align it with the center of the image, then compare it with the working glass scale according to the magnification of the objective lens, and observe whether the distance between the two engraved images of the standard glass scale coincides with the corresponding engraved lines of the working glass scale. If not, use the reading device to read the difference (mm) (the average value of 3 measurements). The projection magnification error of the projector is calculated by the following formula: ×10%
The actual size between the two engraved lines of the standard scale, mm, should be calibrated in the image. The two diameters of the screen are respectively set up with the projection opening and the transmission axis. 8.1 Requirements: The projection system surface should coincide with the axis of the axis. 8.2: Put the calibration rod into the conical hole of the axis, and put a ball of size m into the top hole of the calibration rod. At this time, the image of the screen steel ball gradually disappears. The center sliding movement of the single axis is 6", the general axis is 4\
the general level is 12", and the axis is 8". 9.2 Inspection method: As shown in Figure 2, the autocollimator is installed on the workbench or seat, and the reflector is installed on the axial slide. The moving slide is used for inspection within the full stroke range. The maximum change of the indication around the axis and around the axis is taken as the angle of movement of the axial slide.
一立民：2铭
1自仪;
2一时建
10相问滑极運動的角遇
10.1雾求
JJIG 938—199
Precision grade winding shaft is 6”, winding shaft is 4”, ordinary grade winding shaft is 12”, winding shaft is 8”
10.2 Harding method
As shown in Figure 3, the instrument is placed on a workbench, and the transmitter is installed on the radial negative: the moving plate is checked in parallel within the entire range, and the maximum change batch is taken as the angle of the radial sliding movement around the pin.
The calibration rod is inserted on the north. Dimension
Purpose Color method inspection, when the precision grade is not more than 1m, the contact rate is greater than %; when the thickness of the general grade is not more than 1.5m, the contact rate is greater than %: 11.2 Inspection method
When inspecting the reverse spindle taper hole, use a first-level round chain working plug gauge to apply 3 straight lines on the plug gauge return chain surface along the generatrix direction with red lead or purpuric blue in equal parts, and slowly put the plug gauge into the taper hole to make it close contact, rotate in one direction, and the angle is not large. Then take out the senior gauge to observe and judge the contact rate of the chain hole. When calibrating and verifying the taper, use the standard round gauge for inspection. Paint red or blue on the taper busbar of the calibration rod and perform the inspection in the same way. The ratio of the contact length to the gauge busbar length is used as the combined contact ratio of the taper or calibration sample. 12.2 Verification method: Install the calibration rod on the chain and align it with the center of the end of the steel ball. Use a gauge with a flat probe (a scale value of 0.mm can be used for inspection and verification). Touch the steel ball in contact with the main shaft axis. Rotate the working shaft by not less than 1 meter. The minimum change of the gauge is the working shaft dynamic error: 3 shaft diameter example 3.1 Requirements: Precision grade: not more than 5mm, ordinary grade: not more than 10um 3.2 Inspection method: Install the calibration sample into the tapered hole of the positive vehicle, rotate the spindle, and use a torque gauge (when inspecting the ordinary grade, you can use an indicator with a graduation value of 0.1mm) to inspect at any section within 300mm from the chain hole: Repeat the inspection at least 4 times on the same section, and each time the calibration rod rotates 90F relative to the hole. Take the maximum value of the multiple inspections as the spindle slight circular runout error. 14.1 Requirements: Precision grade: not more than 5m, ordinary grade: not more than 10um 14.2 Inspection method:
Install the test piece (see entry 1) into the complete shaft needle, pull the gauge (the test grade can be used for the grade of 0.5
JJG9381998
indicator! Install it on the dirty device, the probe and the test rod are in contact with the axial movement of the alignment device, and the measurement is carried out in any 300mm range, at 6 two angles (see Figure 4), and the maximum change unit of the torque gauge is the line error: Figure 4
15 Aiming at the verticality of the movement direction to the main shaft axis 15.1 Requirements
Precision grade is not more than 5m, ordinary grade is not more than 10ml15.2 Verification method
Send the special inspection It (see Appendix 2) is installed in the tapered hole of axis 1, and the torque meter (the indicating meter with a graduation value of .0m can be used for ordinary level inspection) is installed in the field standard device. The probe is connected to the end face of the shell, and the radial movement sight device is used for measurement within any 150mm. The maximum change of the torque meter is taken as the verticality error. 16 Instrument indication error
16.1 Requirements
The indication error should be less than that specified in Table 2.
Instrument indication error
Indication error
Directional indication error
Measurement range /a
1115/3
+[T5/2”
*IT5, IT7 is G and I8D0 respectively, and the 5th edition and Lai complained about the center table, H digital and fast, medical value errors are common, Appendix 3.16.2 determination method
Ordinary level
11T7/3'
±TT7/2*
Use the laser to calibrate the interferometer. The calibration of each coordinate indication error should be carried out at a position evenly distributed within the working stroke. When calibrating the radial indication error, install the reflector on the radial elimination plate, and install the interferometer on the lower working table. The reference is 200mm from the end of the main shaft, as shown in Figure 5. The difference between the indication of the * coordinate and the reading of the laser interferometer is the x coordinate affected by 6
J.IG 938--1998
The error of the calibration point, after the positive stroke calibration, the reverse stroke calibration, the maximum error of the positive and reverse stroke errors is the radial indication error, as shown in Figure s
——For the instrument:
2——Calibration of the axis indication error, as shown in Figure 6, the calibration method is the same as above, Figure 6
[7 Instrument indication variability
[7.1 Requirements
2——Reflector
Pressure level radial not more than 3μm, axial not more than 5μm Ordinary level radial not more than 10um, axial not more than 15um 17.2 Calibration method
Put the calibration device into the cone hole of the axial shaft, measure its diameter and length, repeat the measurement 5 times, and take the difference between the maximum and minimum values of the measured values as the instrument indication variability. IV. Processing of verification results and verification cycle
18 For tool pre-adjustment measurement that meets the requirements of this regulation, a verification certificate shall be issued: for those that do not meet the requirements of this regulation, a verification notice shall be issued:
19 The verification cycle of tool pre-adjustment measurement is determined according to the specific use situation, generally one year. Appendix 1
Appendix 2
JJG938-1998
Inspection Building
Chuan handle number2 Verification method
Ordinary grade
11T7/3'
±TT7/2*
Use laser interferometer for verification. The verification of each coordinate indication error should be carried out at a position evenly distributed within the working stroke. When verifying the radial indication error, install the reflector on the radial plate, install the interferometer on the lower working table, and take the position 200mm from the spindle end as the reference, as shown in Figure 5. The difference between the indication of the * coordinate and the reading of the laser interferometer is the x coordinate error. 938--1998
The error of the calibration point, after the positive stroke calibration, the reverse stroke calibration, the maximum error of the positive and reverse stroke errors is the radial indication error, as shown in Figure s
——For the instrument:
2——Calibration of the axis indication error, as shown in Figure 6, the calibration method is the same as above, Figure 6
[7 Instrument indication variability
[7.1 Requirements
2——Reflector
Pressure level radial not more than 3μm, axial not more than 5μm Ordinary level radial not more than 10um, axial not more than 15um 17.2 Calibration method
Put the calibration device into the cone hole of the axial shaft, measure its diameter and length, repeat the measurement 5 times, and take the difference between the maximum and minimum values of the measured values as the instrument indication variability. IV. Processing of verification results and verification cycle
18 For tool pre-adjustment measurement that meets the requirements of this regulation, a verification certificate shall be issued: for those that do not meet the requirements of this regulation, a verification notice shall be issued:
19 The verification cycle of tool pre-adjustment measurement is determined according to the specific use situation, generally one year. Appendix 1
Appendix 2
JJG938-1998
Inspection Building
Chuan handle number2 Verification method
Ordinary grade
11T7/3'
±TT7/2*
Use laser interferometer for verification. The verification of each coordinate indication error should be carried out at a position evenly distributed within the working stroke. When verifying the radial indication error, install the reflector on the radial plate, install the interferometer on the lower working table, and take the position 200mm from the spindle end as the reference, as shown in Figure 5. The difference between the indication of the * coordinate and the reading of the laser interferometer is the x coordinate error. 938--1998
The error of the calibration point, after the positive stroke calibration, the reverse stroke calibration, the maximum error of the positive and reverse stroke errors is the radial indication error, as shown in Figure s
——For the instrument:
2——Calibration of the axis indication error, as shown in Figure 6, the calibration method is the same as above, Figure 6
[7 Instrument indication variability
[7.1 Requirements
2——Reflector
Pressure level radial not more than 3μm, axial not more than 5μm Ordinary level radial not more than 10um, axial not more than 15um 17.2 Calibration method
Put the calibration device into the cone hole of the axial shaft, measure its diameter and length, repeat the measurement 5 times, and take the difference between the maximum and minimum values of the measured values as the instrument indication variability. IV. Processing of verification results and verification cycle
18 For tool pre-adjustment measurement that meets the requirements of this regulation, a verification certificate shall be issued: for those that do not meet the requirements of this regulation, a verification notice shall be issued:
19 The verification cycle of tool pre-adjustment measurement is determined according to the specific use situation, generally one year. Appendix 1
Appendix 2
JJG938-1998
Inspection Building
Chuan handle number
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.