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.

Inactive Publication Date: 2018-04-03
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the improvement of the process, the purpose is to reduce the possibility of cracks in the process of closing the titanium alloy self-locking nut, and then solve the problem of cracking of the titanium alloy nut's closing deformation and thread cracking at room temperature, and realize the closing process at room temperature

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The -5 specification titanium alloy self-locking nut prepared by machining was subjected to solution treatment, the solution temperature was 940°C, kept for 30 minutes, and then water-cooled to room temperature to obtain a sample for closing processing.

[0036] use as figure 1 The hexagonal width of the closing mold core 4 should be 0.05mm larger than the hexagonal width of the nut. The closing mold core 4 is put into the closing mold base 2, and positioning pin 10 is used for positioning, so that the three Ø5 holes evenly distributed on the side of the closing mold core 4 are concentric with the three Ø5 holes of the closing mold base 2 to ensure the closing. 3 can smoothly pass through the closing mold base 2 and the closing mold core 4, and then contact with the sample to be closed. Put the anti-rotation sleeve 9 on the closing mold base 2, and the closing push pin 3 equipped with the spring 11 passes through the hole, and its lower plane should be in contact with ...

Embodiment 2

[0039] The -8 specification titanium alloy self-locking nut prepared by machining was subjected to solution treatment, the solution temperature was 950 ° C, kept for 40 minutes, and then water-cooled to room temperature to obtain a sample for closing processing.

[0040] use as figure 1 The hexagonal width of the closing mold core 4 should be 0.10mm larger than the hexagonal width of the nut. The closing mold core 4 is put into the closing mold base 2, and positioning pin 10 is used for positioning, so that the three Ø5 holes evenly distributed on the side of the closing mold core 4 are concentric with the three Ø5 holes of the closing mold base 2 to ensure the closing. 3 can pass through the closing mold base 2 and the mold core smoothly, and then contact with the sample to be closed. Put the anti-rotation sleeve 9 on the closing mold base 2, and the closing push pin 3 equipped with the spring 11 passes through the hole, and its lower plane should be in contact with the uppe...

Embodiment 3

[0043] The -12 specification titanium alloy self-locking nut prepared by machining was subjected to solution treatment, the solution temperature was 970°C, kept for 60 minutes, and then water-cooled to room temperature to obtain a sample for closing processing.

[0044] use as figure 1 The hexagonal width of the closing mold core 4 should be 0.15mm larger than the hexagonal width of the nut. The closing mold core 4 is put into the closing mold base 2, and positioning pin 10 is used for positioning, so that the three Ø5 holes evenly distributed on the side of the closing mold core 4 are concentric with the three Ø5 holes of the closing mold base 2 to ensure the closing. 3 can pass through the closing mold base 2 and the mold core smoothly, and then contact with the sample to be closed. Put the anti-rotation sleeve 9 on the closing mold base 2, and the closing push pin 3 equipped with the spring 11 passes through the hole, and its lower plane should be in contact with the upper...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/10B21D53/24
CPCB21D37/10B21D53/24
Inventor 王立东刘风雷赵庆云梁福顺
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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