This standard specifies the type and size, tooth size and deviation, technical requirements, and basic requirements for marking and packaging of 55° tapered pipe thread rolling plates, and gives the use and installation requirements of 55° tapered pipe thread rolling plates (hereinafter referred to as rolling plates) in Appendix A (informative appendix). JB/T 9999-1999 55° tapered pipe thread rolling plates JB/T9999-1999 Standard download decompression password: www.bzxz.net

JHCS25.100.50
Machinery Industry Standard of the People's Republic of China
JB/T9999—1999
55° Taper Pipe Thread Rolling Plate
1999-05-20 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9999—1999
The small standard is a revision of ZBJ4116—39≤55° Net Can Pipe Bad Effect Fast Thread Plate. During the revision, the thinness value of the rolling plate was adjusted, the thickness dimension was changed to the reference dimension, and the thickness dimension limit deviation was cancelled: and editorial changes were made according to relevant regulations. Other changes were made according to technical content.
This standard replaces ZBJ41016—89 from the month of implementation. Appendix A of this standard is a reminder appendix.
This standard is issued and managed by the National Technical Committee for Standardization. The responsible drafting unit of the standard: Chengdu Machinery Research Institute. The main drafters of the standard: Cha Gui, Yin Panhe, Zhang Ranwu, Chen Chengshou, Xia Qian, 1 Scope
Mechanical Industry Standard of the People's Republic of China
55° Tapered Thread Thread Rolling Plate
JET9999-1999
Generation J41 016-89
This standard specifies the type and size, tooth size and deviation, technical requirements and some requirements for marking and packaging of 55° Tapered Pipe Thread Rolling Plate. And in Appendix A (Appendix of Suggestion), the use and installation requirements of 55° Tapered Pipe Thread Rolling Plate (hereinafter referred to as Rolling Plate) are given.
This standard applies to the R series thread plates of pipe threads for processing thread seals (threads for thread seals according to GB 730619).
2 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 and all standards will be revised. The parties using this standard should explore the possibility of using the latest versions of the following standards. GB: T7306-1987 Types and sizes of pipe threads for thread seals
The types of these plates are shown in Figure 1, and the sizes are given in Table 1. Table 1
Approved by China Machinery Industry Bureau on 1999-05-20tewwW.bzxz.Net
Implementation on 2000-01-01
JB/9999-1999
2) Movable wire-detecting brick
b) Weekly qualitative wire analysis
3.2 The thread-rolling plate has a number of teeth as shown in Figure 2, and the dimensions and deviations are given in Table 2. 3.3 Marking example: The thread rolling plate with 317 core and RY pipe thread pattern is marked as: 55° thread rolling plate R for pipe threads 4 Technical requirements: JEE9999-1999 JB999—1999 4.1 The surface of the sample thread plate shall not have defects such as cracks, broken teeth, rust and burns before grinding, which may affect its performance. 4.2 The relative R value of the effective surface, belt surface and supporting surface of the sample thread rolling plate is 0.8. 4.3 Among the pair of thread rolling plates, the width difference between the fixed thread rolling plate and the movable thread rolling plate shall not exceed 0.10mm~±0.009
4.4 Based on the intersection of the plane of the supporting surface of the thread rolling plate and the top plane, the parallel bottom tolerance of the supporting plane is as follows: Width: R: 0.04mm: RX: 0.05mml
Length: SRY0.08mm
->RK: 0.10mm.
4.5 The required straightness tolerance of the thread rolling support to the installation surface is (.0.mm4.6 The angle difference of the thread plate screw is ±3', and the difference between the auxiliary thread plate is 3\:mm
The tooth type half
Angle anti-flange
±25°
± zor
4. The thread rolling technology is made of 12MmV or SiCr alloy 1. The steel made of Cr12MoV has a magnetized hardness of no more than 3 levels.
4. The hardness of the thread rolling plate is 59~6IHRC. The surface of the thread effect should not be in the place where decarburization and hardness reduction occur. 5 Marking and packaging
5.1 Marking
5.1.1 The product should be marked with:
) manufacturer or seller's trademark;
b) thread code:
c) material brand.
5.1.z Packing box 1 Marking:
JB/t999g-1999
a) manufacturer or seller's name, address, trademark: b) thread plate mark:
c) material brand;
d) number of pieces:
e) year and month of manufacture.
5.2 Packaging
The thread rolling plate shall be treated with rust prevention before packaging. The packaging must be firm and can prevent damage during transportation. JB/T9999—1999
Appendix A
(Appendix for reference)
Use and installation of thread rolling plate
The use and installation of A155° round thread thread rolling plate shall be as shown in Figure A1. Cut-off style "This net and above
-47-24
Here is the mark "This is called Xiangshi\
10 ±7*24
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