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Necking-burnishing optimized composite device and process for titanium alloy bushing

A composite device, titanium alloy technology, applied in metal processing equipment, forging/pressing/hammer devices, manufacturing tools, etc., can solve the problems that the bushing is not suitable for spacecraft and the mechanical properties are greatly improved.

Active Publication Date: 2020-10-13
ZHEJIANG SHENJI TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of existing industrial pure titanium cannot meet the needs of the spacecraft, and its mechanical properties cannot be greatly improved through heat treatment, making the manufactured bushes unsuitable for spacecraft.

Method used

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  • Necking-burnishing optimized composite device and process for titanium alloy bushing
  • Necking-burnishing optimized composite device and process for titanium alloy bushing
  • Necking-burnishing optimized composite device and process for titanium alloy bushing

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Embodiment Construction

[0025] Such as figure 1 As shown, it is the transmission shaft bushing part used in aerospace engineering related to this embodiment. According to working conditions, the bushing should be corrosion-resistant in medium-temperature air medium. It was originally made of stainless steel 1Cr18Ni9Ti, but now it is made of industrial pure titanium TA1 for weight reduction. It is well known that the strength and wear resistance of this alloy cannot be improved by heat treatment. The strength of commercially pure titanium TA1 after annealing is not high. Therefore, the only way to improve its strength, hardness and wear resistance is cold plastic deformation. Considering the additional requirements of high precision for the manufacture of the bushing and low roughness of the cylindrical surface, the industrial manufacture with the combined necking-squeezing process is the most reasonable.

[0026] Therefore, in order to maximize the strength performance of the part, it is required ...

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Abstract

The invention relates to a necking-burnishing optimized composite device and process for a titanium alloy bushing. The device comprises an upper die portion, a lower die portion and a control ruler arranged between the upper die portion and the lower die portion, wherein one end of the control ruler is fixedly connected with the upper die portion, and the other end of the control ruler is movablyconnected with the lower die portion in a sleeving manner for limiting. According to the necking-burnishing optimized composite device and process, maximum compression deformation is guaranteed in a pair of dies by using a necking-burnishing composite process, the strength index is increased to 2.6 times while the bushing manufacturing efficiency is improved, the manufacturing precision and the surface roughness meet the requirements, auxiliary machining and grinding are omitted, the product quality is greatly improved, and the requirements of aerospace engineering are met.

Description

technical field [0001] The present invention relates to a technology in the field of mechanical manufacturing, specifically a necking-squeezing optimization composite device and process for a press machine to complete titanium alloy bushing necking-squeezing optimization in one stroke. Background technique [0002] Bushings, as mechanical reducers, moving parts of automobiles and tractors, and even important moving joints for aircraft transmission, have particularly high performance and high-quality manufacturing requirements, including strength, hardness, dimensional and shape accuracy, surface roughness, etc. However, in the prior art, it is still impossible to use the necking-squeezing composite process to produce bushes with high quality and quantity in a pair of moulds. [0003] In addition, some spacecraft originally used 1Cr18Ni9Ti stainless steel for overweight engine bushings, and replaced them with titanium alloys. However, the mechanical properties of existing in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J13/02B21K1/76
CPCB21J13/02B21K1/762
Inventor 梁必成袁秦峰贺鹏王以华
Owner ZHEJIANG SHENJI TITANIUM IND
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