Necking process method and necking tool for titanium alloy self-locking nut

A technology of self-locking nut and process method, applied in nuts, metal processing equipment, forming tools, etc., can solve the problems of deformation of thread cracking at the end, and achieve the effect of eliminating processing stress, improving safety, and avoiding the possibility of cracks.
CN107866476AInactive Publication Date: 2018-04-03AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
Publication Date
2018-04-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a necking process method for a titanium alloy self-locking nut. The method comprises the following steps: S1: performing solid solution heat treatment on a titanium alloy self-locking nut sample prepared by machining to manufacture a sample to be necked; S2: performing necking processing on the sample to be necked at room temperature; and S3 after the necking processing isfinished, performing aging treatment on the titanium alloy self-locking nut, thereby finishing the necking processing of the whole titanium alloy self-locking nut. The possibility that the titanium alloy self-locking nut generates cracks in the process of necking processing process is reduced, the difficult problem that the titanium alloy nut is necked and deformed at room temperature and threadsare cracked is solved, and the necking is realized at the room temperature; and meanwhile, a necking tool is matched, and the tool is more compact in structure, more convenient to operate, more accurate in position and size control, and higher in safety and reliability.
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Description

technical field

[0001] The invention relates to the technical field of self-locking nuts, in particular to a closing process method and closing tooling for titanium alloy self-locking nuts. Background technique

[0002] Self-locking nuts are widely used as threaded connection parts in the vibration and anti-loosening parts of civil and military aircraft. The core problem of its structural design is to achieve the required anti-loosening performance, and its locking ability is achieved through the self-locking nuts. The hexagonal end of the hexagonal end is closed at three points to deform the thread. When the bolt is screwed into the nut body, the closed mouth is opened, and the thread of the bolt and the thread of the deformed nut are screwed and compressed, thereby generating a locking torque to achieve the purpose of anti-loosening and locking. . However, TC4 alloy is a typical α-β type two-phase titanium alloy. At room temperature, its plasticity is low, its yield stren...

Claims

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