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Method for manufacturing steel-copper composite shaft sleeve

A technology of composite shaft sleeve and manufacturing method, which is applied in the field of manufacturing steel-copper composite shaft sleeves, can solve the problems of low density and mechanical properties of copper alloy, difficulty in realizing industrialized large-scale production, and limited application range, and achieve high mechanical properties and microstructure Dense, good surface finish

Inactive Publication Date: 2010-05-05
WUJIANG RONGSHUN PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process adopts powder rolling and butt welding, and the density and mechanical properties of the copper alloy are low. Especially for products with thick and large steel backs, it is difficult to realize industrialized mass production. Moreover, powder metallurgy requires large-scale sintering equipment and the process is complicated. The production process is long, the cost is high, the technical requirements are high, and the scope of application is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment provides a steel-copper composite bushing with the following specifications and dimensions: outer diameter 185mm, inner diameter 155mm, length 80mm, and the thickness of the copper alloy layer is 5mm. Steel shaft sleeve material: 20 steel; copper alloy layer material: ZQSn10-2; shaft sleeve outer circle and end surface roughness Ra3.2, inner circle alloy copper layer surface roughness Ra1.6.

[0019] The manufacturing method of the steel-copper composite bushing specifically includes the following steps:

[0020] (1) Preparation of steel bushings: select steel pipes with an outer diameter of 195mm, an inner diameter of 160mm, and a length of 255mm, and process them into steel bushings with an outer diameter of 190mm, an inner diameter of 165mm, and a length of 250mm. Reserve a machining allowance of 3~5mm on the outer surface of the steel bushing for further processing after casting. The two ends of the steel bushing are sealed with cover plates, and a pourin...

Embodiment 2

[0030] This embodiment provides a flanged steel-copper composite bushing with the following specifications and dimensions: flange outer diameter 130mm, inner diameter 52mm, flange thickness 18mm, straight end outer diameter 82mm, inner diameter same as flange inner diameter, total length 46mm, tin bronze The thickness is 3mm. Steel shaft sleeve material: 20 steel; copper layer material: ZQSn10-2, shaft sleeve outer circle and end surface roughness Ra3.2, inner circle copper layer surface roughness Ra1.6.

[0031] The manufacturing method of the flange type steel-copper composite shaft sleeve includes the following steps:

[0032] (1) Preparation of steel shaft sleeve: the flanged steel shaft sleeve is cut by solid bar material with an outer diameter of 140mm. The processed shape is flanged on both ends (two pieces in one type), flange outer diameter 136mm, straight cylinder The outer diameter is 90mm, the inner diameter is 58mm, and the length is 98mm. The surface roughness of th...

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Abstract

The invention relates to a method for manufacturing a steel-copper composite shaft sleeve, and the method comprises the following steps: (1) sealing one end of a steel shaft sleeve, thereby accommodating copper alloy liquid; (2) carrying out centrifuge rotation on the steel shaft sleeve with the copper alloy liquid, thereby combining the copper alloy liquid in the steel shaft sleeve on an inner surface of the steel shaft sleeve under the action of centrifugal force; and (3) carrying out machining on the steel shaft sleeve after the step (2) for obtaining the steel-copper composite shaft sleeve with the required specification. The method has the advantages of simple production technology, high production efficiency and low cost and is applicable to producing a variety of the steel-cooper composite shaft sleeves; in addition, a copper layer surface obtained by applying the method has the advantages of compact structure, high mechanical performances, good surface smoothness, good self-lubrication, good wear resistance and the like.

Description

Technical field [0001] The invention relates to a method for manufacturing a steel-copper composite shaft sleeve. Background technique [0002] The steel-copper composite bushing is a new type of product developed and applied in my country in the 1930s. This product has the advantages of high fatigue strength, good thermal conductivity, and good wear resistance. It is suitable for transmission with medium speed and high impact load. It can replace traditional sliding bushings and pure copper bushings. [0003] In the prior art, the steel-copper composite bushings are mostly produced by powder metallurgy, that is, the low-carbon steel back is first used as the matrix, and the surface is sintered with copper alloy powders of different compositions. After multiple high-temperature sintering and dense rolling, a steel-copper integrated The bimetallic strip is welded and machined to form a steel-copper composite bushing. This process uses powder rolling and butt welding, and the densit...

Claims

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Application Information

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IPC IPC(8): F16C33/14B22D19/16B22D13/00
Inventor 孙林军陆忠飞
Owner WUJIANG RONGSHUN PRECISION CASTING
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