This standard specifies the type and size, accuracy grade and tolerance, technical requirements, inspection rules, marking and packaging of 1:24 taper gauges. This standard is applicable to the 1:24 taper gauges used to inspect the taper of the spindle taper end of spiral bevel gear grinding machines and milling machines and their matching milling cutter discs and tool setting instruments. JB/T 8789-1998 1:24 (UG) taper gauge JB/T8789-1998 Standard download decompression password: www.bzxz.net

JB/T8789--1998
Before the formulation of this standard, there was no domestic standard for this product, nor any foreign reference materials. After surveying and mapping the sample (imported), this standard was formulated with reference to GB11852-89 "Tolerances and Technical Conditions for Taper Gauges" and verification data. The gauge taper angle in this standard is given according to the 1:24 standard taper angle of 2°23'13.1\, and the taper angle deviation is determined according to the single-item double-minus limit deviation, which is consistent with the gauge taper angle of 2°22'22\ of the American Gleason Company. The gauges specified in this standard are only applicable to the inspection of Type 1 (1a, Ib) parts in JB/T8359--96 "Single Tooth Bevel Gear Milling Machine Tool Spindle End". Since Type I (Ia, Ib) parts are old structures and will be replaced, gauges used to inspect Type I parts are not considered in this standard.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Measuring Tools and Instruments. The responsible drafting unit of this standard is Harbin Measuring Tool and Cutting Tool Factory. The main drafters of this standard are Zhu Hongjie, Li Shujun and Yang Yan. 393
1 Scope
Mechanical Industry Standard of the People's Republic of China
1:24 (UG) Taper Gauge
JB/T 8789-1998
This standard specifies the type and size, accuracy grade and tolerance, technical requirements, inspection rules, marking and packaging of 1:24 taper gauges. This standard is applicable to the 1:24 taper gauges used to inspect the taper of the spindle taper end of spiral bevel gear grinding machines and milling machines and their matching milling cutter discs and tool setting instruments.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard by being referenced in this standard. When this standard is released, 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. GB11852--89 Tolerances and technical conditions for cone gauges JB/T8359-96 Spiral bevel gear milling machine tool spindle end 3 types and dimensions
3.11:24 The type of cone gauge is shown in Figure 1. The figure is only for illustration and does not represent the detailed structure. Figure 1
3.21:24 The dimensions of the cone plug gauge are shown in Table 1. Approved by the State Machinery Industry Bureau on July 17, 1998 394bzxZ.net
1998-12-01 implementation
Cone specifications
Taper C
Cone angle α
2°23'13.1\
JB/T8789-1998
Basic dimensions
3.3124 The dimensions of the cone ring gauge are shown in Table 2.
Cone specification
Taper C
1: 24=0.04167
Accuracy grade and tolerance
Cone angle α
2°23'13.1\
D+- 003
Reference size
The cone angle tolerance AT of the 1:24 cone gauge used to check the cone angle and size shall not be greater than the values ​​specified in Tables 3 and 4. 4.1
The value of the cone angle tolerance ATrop is given according to the measuring length Lp. ATpp=AT.LuX10-3
Where: ATpp is in μm,
AT. is in μrad;
L, is in mm.
Cone specification
The measuring length Lp is equal to the cone length 1.
1-level plug gauges can be used as standard gauges after verification; 2-level plug gauges are used as working gauges. 2
（＂）
Cone specifications
JB/T 8789--1998
Note: The measuring length I is equal to the cone length 1 (ring gauge) and (plug gauge). 5 Technical requirements
5.1 The technical requirements for cone gauges shall comply with the relevant provisions of Chapter 4 of GB11852--89. 5.2 The total runout tolerance of the large end face of the cone gauge is 0.001mm. Calibration plug gauge for working ring gauge
—172. 5
（\）
5.3 The roundness tolerance and straightness tolerance of the first-grade taper plug gauge are 0.5um; the roundness tolerance and straightness tolerance of the second-grade taper plug gauge and the working ring gauge are 0.8μm. 6 Inspection rules
6.1 Cone angle measurement
6.1.1 Cone angle measurement of taper plug gauge
The first-grade taper plug gauge is inspected with a taper angle measuring instrument. The second-grade taper plug gauge and the working ring gauge are measured with a taper comparator. The measurement principle is shown in Figure 2. ?
6.1.2 Cone ring gauge cone angle measurement
Cone working ring gauge is inspected with a calibration plug gauge During the test, the grinding contact rate reaches more than 90%, and the coating thickness should not exceed 2μm. 6.2 Measurement of the diameter D of the taper gauge
6.2.1 Measurement of the diameter D of the working ring gauge
When using a plug gauge to check the diameter D of the taper working ring gauge, it is determined according to the gap (see Figure 3). Dring=Dplug measured-Co
Where: Dhoney measured~
The measured size of the large end of the plug gauge,
Taper;
The gap between the two end faces after the plug gauge and the ring gauge are ground together. The taper plug gauge diameter D can be measured using a horizontal length measuring instrument with the help of a roller, or other measurement methods with equal accuracy 6.2.2| |tt||JB/T87891998
Conical working ring gauge
6.3 Measurement of shape tolerance and position tolerance of cone gauge6.3.1 The roundness tolerance of cone gauge is tested by roundness meter. Figure 3
6.3.2 The total runout tolerance of cone gauge is tested by three-dimensional coordinate measuring machine or other testing methods with equal accuracy. 6.3.3 The straightness tolerance of cone gauge element line can be tested with the help of profiler air-floating workbench. 7 Marking and packaging
7.1 Marking
The non-working surface of cone gauge and the product packaging box should be clearly marked: a) manufacturer's name or registered trademark;||t t||b) Specification model;
c) Accuracy grade and application code;
d) Production serial number.
Marking example:
7.2 Packaging
7.2.1 Cone gauges should be rust-proofed and properly packaged. 95001
一Production serial number
Manufacturer name or registered trademark
Application code (calibration gauge J, working gauge (G) Accuracy grade (limited to plug gauge)
Cone specification
7.2.2 Cone gauges produced in accordance with this standard should be accompanied by a product certificate, and the code of this standard should be indicated on the certificate.397
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