Laser polishing and laser shock peening manufacturing methods for welded or additively repaired areas

A technology of laser shock strengthening and laser polishing, which is applied in the fields of welding or additive repair of metal materials, surface treatment and strengthening after welding or repair, and can solve problems such as difficult to achieve high-quality manufacturing, so as to improve the surface quality of workpieces and reduce roughness , the effect of improving the service life

Active Publication Date: 2021-08-06
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is aimed at the problem that it is difficult to achieve high-quality manufacturing due to any of the above-mentioned single process factors, and provides a laser polishing and laser shock strengthening manufacturing method for welding or additive repair areas. The method combines welding or additive repair technology, laser polishing technology Combined with laser shock strengthening technology to form a composite integrated manufacturing method to solve the above technical problems

Method used

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  • Laser polishing and laser shock peening manufacturing methods for welded or additively repaired areas
  • Laser polishing and laser shock peening manufacturing methods for welded or additively repaired areas
  • Laser polishing and laser shock peening manufacturing methods for welded or additively repaired areas

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Embodiment 1

[0026] The embodiment of the present invention takes the realization of arc additive repairing of the overall blisk (taking the GE90 engine compressor as an example, the material used: TC17 titanium alloy) as an example, combining arc additive technology, laser polishing technology and laser shock strengthening. The method flow is as follows figure 1 As shown, the specific steps are as follows:

[0027] Step 1: Use 200-mesh, 400-mesh, 800-mesh, 1500-mesh and 2500-mesh sandpaper in sequence to polish the workpiece 2 to be repaired by additives, then place it in acetone for ultrasonic cleaning to remove impurities and oil on the surface of the workpiece, and then place it in a 120°C oven Dry in medium for 1 hour; place the cleaned workpiece to be repaired on the CNC workbench 3 for positioning and clamping.

[0028] Step 2, according to the size of the workpiece to be repaired, import the 3D model of the additive repair into the equipment; set the parameters of the arc additive...

Embodiment 2

[0036] In the embodiment of the present invention, taking the realization of arc additive repairing of aircraft engine turbine blades (the material used: TC17 titanium alloy) as an example, the arc additive technology, laser polishing technology and laser shock strengthening are combined. The method flow is as follows figure 1 As shown, the specific steps are as follows:

[0037] Step 1: Use 200-mesh, 400-mesh, 800-mesh, 1500-mesh and 2500-mesh sandpaper in sequence to polish the workpiece 2 to be repaired by additives, then place it in acetone for ultrasonic cleaning to remove impurities and oil on the surface of the workpiece, and then place it in a 120°C oven Dry in medium for 1 hour; place the cleaned workpiece to be repaired on the CNC workbench 3 for positioning and clamping.

[0038] Step 2, according to the size of the workpiece to be repaired, import the 3D model of the additive repair into the equipment; set the parameters of the arc additive equipment: welding current...

Embodiment 3

[0043] In the embodiment of the present invention, taking electric arc additive repairing of automobile pedals (the material used: carbon steel) as an example, the arc additive technology, laser polishing technology and laser shock strengthening are combined, and the method flow is as follows figure 1 As shown, the specific steps are as follows:

[0044] Step 1: Use 200-mesh, 400-mesh, 800-mesh, 1500-mesh and 2500-mesh sandpaper in sequence to polish the workpiece 2 to be repaired by additives, then place it in acetone for ultrasonic cleaning to remove impurities and oil on the surface of the workpiece, and then place it in a 120°C oven Dry in medium for 1 hour; place the cleaned workpiece to be repaired on the CNC workbench 3 for positioning and clamping.

[0045] Step 2. According to the size of the workpiece to be repaired, set the parameters of the arc additive equipment: welding current 120A, welding speed 150mm / min, wire feeding speed 1500mm / min, wire diameter 1.6mm, fro...

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Abstract

The invention discloses a laser polishing and laser shock strengthening manufacturing method for a welding or additive repair area. After machining the workpiece after welding or additive repair, the laser polishing technology is used to perform laser polishing on the surface of the workpiece to reduce the surface roughness of the workpiece. degree, improve the surface quality of the workpiece, and improve the polishing efficiency; then carry out laser shock strengthening on the surface of the workpiece after laser polishing, change the stress state of the workpiece surface, make it all compressive stress, and improve the service life of the workpiece; the welding or additive repair The combination of advanced technology, laser polishing technology and laser shock strengthening technology can complete the composite manufacturing of complex parts, greatly improve production efficiency, and save costs. And it can realize the comprehensive improvement of the microstructure modification, smoothness improvement and mechanical performance improvement of the repaired area.

Description

technical field [0001] The invention relates to the technical field of metal material welding or additive repair and surface treatment and strengthening after welding or repair, in particular to a laser polishing and laser shock strengthening composite processing and manufacturing method for welding or additive repair metal surfaces. Background technique [0002] In recent years, the process of metal welding or metal additive repair is often accompanied by problems such as splashes, bosses, and rippling textures. These problems lead to large surface roughness of manufactured parts, and easily lead to stress concentration and cracking during use. . For simple structural parts, machining is often used to remove surface spatter particles, welding reinforcement, etc., but the surface roughness after machining is relatively large, and it is difficult to meet the surface roughness requirements of complex structural parts. [0003] The surface roughness of the workpiece after weld...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/352B23K26/356B33Y10/00
CPCB33Y10/00B23K26/356B23K26/3576
Inventor 郭伟薛俊良张恭轩桓恒邵天巍彭鹏朱颖
Owner BEIHANG UNIV
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