Machining process of high-temperature-resistant anti-loosening bolt

A processing technology and anti-loosening technology, which is applied in the direction of bolts, threaded products, manufacturing tools, etc., can solve the problems of unreliable vibration, small bolt tightening torque, and easy loosening, so as to improve hardness and eliminate internal Stress, the effect of increasing reliability

Pending Publication Date: 2021-03-16
嘉兴联控新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. There are too many gaps in the standard thread matching, and the fasteners are prone to loosening during vibration and thermal expansion;
[0005] 2. After the nut is formed, the thread needs to be deformed sepa

Method used

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  • Machining process of high-temperature-resistant anti-loosening bolt
  • Machining process of high-temperature-resistant anti-loosening bolt
  • Machining process of high-temperature-resistant anti-loosening bolt

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A processing technology for high temperature resistant and anti-loosening bolts, comprising the following steps:

[0041] S1. Select austenitic stainless steel as raw material, and make corresponding blanks according to product specifications;

[0042] S2, cold heading out four sections of blanks of different sizes, which are respectively the head 1, the first thread section section 2, the connecting section 3, and the second thread section section 4;

[0043] S3, upsetting the head 1 of the blank into a hexagonal shape;

[0044] S4, cleaning to remove the surface dirt produced by cold heading;

[0045] S5, perform solution treatment on the blank;

[0046] S6, aging treatment of the blank;

[0047] S7, using a thread rolling machine, for the first thread section section 2 and the second thread section section 4, both the standard thread 5 and the anti-loosening thread 6 are rolled out at one time;

[0048] S8. Carry out a special numerical test of effective torque o...

Embodiment 2

[0057] A processing technology for high temperature resistant and anti-loosening bolts, comprising the following steps:

[0058] S1. Select austenitic stainless steel as raw material, and make corresponding blanks according to product specifications;

[0059] S2, cold heading out four sections of blanks of different sizes, which are respectively the head 1, the first thread section section 2, the connecting section 3, and the second thread section section 4;

[0060] S3, upsetting the head 1 of the blank into a hexagonal shape;

[0061] S4, cleaning to remove the surface dirt produced by cold heading;

[0062] S5, perform solution treatment on the blank;

[0063]S6, aging treatment of the blank;

[0064] S7, using a thread rolling machine, for the first thread section section 2 and the second thread section section 4, both the standard thread 5 and the anti-loosening thread 6 are rolled out at one time;

[0065] S8. Carry out a special numerical test of effective torque on...

Embodiment 3

[0074] A processing technology for high temperature resistant and anti-loosening bolts, comprising the following steps:

[0075] S1. Select austenitic stainless steel as raw material, and make corresponding blanks according to product specifications;

[0076] S2, cold heading out four sections of blanks of different sizes, which are respectively the head 1, the first thread section section 2, the connecting section 3, and the second thread section section 4;

[0077] S3, upsetting the head 1 of the blank into a hexagonal shape;

[0078] S4, cleaning to remove the surface dirt produced by cold heading;

[0079] S5, perform solution treatment on the blank;

[0080] S6, aging treatment of the blank;

[0081] S7, using a thread rolling machine, for the first thread section section 2 and the second thread section section 4, both the standard thread 5 and the anti-loosening thread 6 are rolled out at one time;

[0082] S8. Carry out a special numerical test of effective torque o...

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Abstract

The invention discloses a machining process of a high-temperature-resistant anti-loosening bolt. The machining process comprises the following steps that S1, austenitic stainless steel is selected asa raw material, and a corresponding blank is manufactured according to the product specification; S2, cold heading is carried out to form four sections of blanks with different sizes, namely a head part, a first thread section section, a connecting section and a second thread section in sequence; and S3, the heads of the blanks are upset to be hexagonal. According to the machining process, standard threads and anti-loosening threads are twisted at a time, the machining process is simple, and the percent of pass of finished products is high; austenitic stainless steel is adopted as the raw material, and through solid solution and aging treatment, the hardness and the mechanical property reach the 10.9 grade; meanwhile, the thread form of the anti-loosening thread is not prone to deformation, the torque performance cannot be greatly attenuated, and the anti-loosening thread can be repeatedly used; a self-locking oblique angle is added, the situation that only one side face of a traditional thread is locked is changed, and the effect of locking the thread bottom and the side face of the external thread is achieved; and the reliability of tightening torque and clamping force is improved, and loosening can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of bolt processing, in particular to a processing technology for high temperature resistant and anti-loosening bolts. Background technique [0002] Bolts are used to fasten parts with through holes and are widely used in all walks of life. Different application scenarios have different requirements for bolts, such as extremely small bolts that need to be used in cameras, glasses, clocks, electronics, etc.; as for engineering, Buildings and bridges use large bolts; while in vehicles, aircraft, trams, automobiles, etc., both large and small bolts are required, and bolts play an important role in industry. [0003] In the existing fastener assembly structure, most of the standard internal thread self-locking structure is used. However, in the process of bolt processing and forming, there are still the following problems: [0004] 1. There are too many gaps in the standard thread matching, and the fasteners are...

Claims

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Application Information

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IPC IPC(8): B21K1/44B21H3/06C21D9/00
CPCB21K1/44B21H3/06C21D9/0093C21D2211/001
Inventor 朱琪周伟民曹长俊
Owner 嘉兴联控新能源科技有限公司
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