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Copper alloy sliding bearing repairing technology

A sliding bearing and copper alloy technology, applied in the field of bearing repair, can solve problems such as high requirements for the environment and operators, impact on health, and large material loss, and achieve the effects of improving the working environment, large linear expansion coefficient, and stable combustion

Active Publication Date: 2019-02-01
浙江翰德圣智能再制造技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional repair process of copper alloy bearings is arc welding or carbon arc welding. This method is complex in process, has high requirements on the environment and operators, requires a lot of follow-up machining, and has a large loss of materials. In addition, a large amount of volatilized metal gas is harmful to the human body and takes a long time. Working hours affects health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the chemical composition of the copper alloy sliding bearing is as follows: Sn3.93, Pb16.06, and Cu; the repair process includes the following steps:

[0026] (1) Determine the bearing damage location;

[0027] (2) Grinding the cavitation part;

[0028] (3) welding repair;

[0029] (4) Finishing.

[0030] In step (1), inspect the surface defects, determine the cavitation location, and make a mark.

[0031] In step (2), the sliding bearing is fixed on the vise, and the cavitation part is ground with a grinder, wherein the undamaged contact surface remains.

[0032] In step (3), the process of precision pulse welding is used to repair the copper alloy sliding bearing. The process parameters are: adopt tungsten non-melting electrode, welding current is 30A, welding time is 35ms, wire feeding speed is 4.0r / min, welding wire and The distance between the workpieces is 3mm, the diameter of the welding wire is 1.2mm, the welding pool is protected by argo...

Embodiment 2

[0036] In this embodiment, the chemical composition of the copper alloy sliding bearing is as follows: Sn3.56, Pb16.73, and Cu; the repair process includes the following steps:

[0037] (1) Determine the bearing damage location;

[0038] (2) Grinding the cavitation part;

[0039] (3) welding repair;

[0040] (4) Finishing.

[0041] In step (1), inspect the surface defects, determine the cavitation location, and make a mark.

[0042] In step (2), the sliding bearing is fixed on the vise, and the cavitation part is ground with a grinder, wherein the undamaged contact surface remains.

[0043] In step (3), the process of precision pulse welding is used to repair the copper alloy sliding bearing. The process parameters are: adopt tungsten non-melting electrode, welding current is 25A, welding time is 30ms, wire feeding speed is 3.5r / min, welding wire and The distance between the workpieces is 3mm, the diameter of the welding wire is 1.0mm, the welding pool is protected by argo...

Embodiment 3

[0047] In this embodiment, the chemical composition of the copper alloy sliding bearing is as follows: Sn6.28, Pb11.79, and Cu; the repair process includes the following steps:

[0048] (1) Determine the bearing damage location;

[0049] (2) Grinding the cavitation part;

[0050] (3) welding repair;

[0051] (4) Finishing.

[0052] In step (1), inspect the surface defects, determine the cavitation location, and make a mark.

[0053] In step (2), the sliding bearing is fixed on the vise, and the cavitation part is ground with a grinder, wherein the undamaged contact surface remains.

[0054] In step (3), the process of precision pulse welding is used to repair the copper alloy sliding bearing. The process parameters are: adopt tungsten non-melting electrode, welding current is 35A, welding time is 40ms, wire feeding speed is 3.5r / min, welding wire and The distance between the workpieces is 3mm, the diameter of the welding wire is 1.4mm, the welding pool is protected by argo...

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PUM

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Abstract

The invention belongs to the field of bearing renovation, and relates to a copper alloy sliding bearing repairing technology. The copper alloy sliding bearing repairing technology is suitable for repairing of various kinds of copper alloy sliding bearings. The copper alloy sliding bearing repairing technology comprises the following steps that (1) a surface defect is inspected, and the damaged position of the copper alloy sliding bearing is determined and marked; (2) a gas etching part is ground; (3) welding repairing is carried out; and (4) finish machining is carried out. Aiming at the copper alloy sliding bearing renovation, a welding technology method of precise impulse welding is provided, by grinding the gas etching part, the welding technology method of precise impulse welding is adopted, and the bearing is machined to an original size, so that the using performance of the bearing is recovered.

Description

technical field [0001] The invention belongs to the field of bearing repair and relates to a copper alloy sliding bearing repair process, which is suitable for repairing various copper alloy sliding bearings. Background technique [0002] Bearing alloys require not only high mechanical strength and adaptability, but also the ability to absorb the embedding of foreign hard particles, and also require corrosion resistance. Copper alloy is a bearing alloy with hard matrix and soft particles. It is a material with excellent mechanical properties and corrosion resistance. It is widely used in modern industry. These materials generally work in harsh environments and are easy to wear. The traditional repair process of copper alloy bearings is arc welding or carbon arc welding. This method is complex in process, has high requirements on the environment and operators, requires a lot of follow-up machining, and has a large loss of materials. Moreover, a large amount of volatilized met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 陈培佳韩旭谢玉江陈书
Owner 浙江翰德圣智能再制造技术有限公司
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