Method and device for improving constraint effect of laser high temperature shot blasting

A high-temperature shot peening and laser technology, applied in the field of laser shock forming, can solve the problems of not being able to adapt to high temperature and complex surface impact forming, confinement medium damage, laser beam dispersion, etc., to achieve excellent confinement effect, uniform residual stress field, and device operation simple effect

Active Publication Date: 2014-09-10
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the existing laser shock confinement has poor effect, will disperse the laser beam or cause damage to the confinement medium, especially the problem that it cannot adapt to high temperature and complex surface shock forming, and provides a method that uses high-voltage pulsed gas as the confinement medium , a method and device that can significantly improve the confinement effect of laser high-temperature shot peening, which constrains laser-induced shock pressure through high-pressure pulsed gas, can overcome the shortcomings of the prior art, and is suitable for laser peening occasions with higher temperatures and complex surfaces. It is not affected by the local stress concentration caused by the plasma explosion, and at the same time, it can achieve better confinement effect without affecting the plasma condensation, ensuring the effectiveness and reliability of the laser temperature shot peening confinement layer

Method used

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  • Method and device for improving constraint effect of laser high temperature shot blasting
  • Method and device for improving constraint effect of laser high temperature shot blasting
  • Method and device for improving constraint effect of laser high temperature shot blasting

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Embodiment 1

[0039] Such as Figure 1-4 shown.

[0040] A method to improve the confinement effect of laser high-temperature shot peening, the essence of which is to use the impact pressure generated by high-pressure pulsed gas to confine the pressure generated by the plasma explosion induced by laser high-temperature shot peening. This confinement method can be used without affecting the plasma condensation At the same time, it can get rid of the shackles of temperature and is applied to laser peening at higher temperatures. At the same time, this confinement method is not affected by local stress concentration, and can be widely used in laser shocking of flat and curved workpieces, ensuring that the laser temperature peening confinement layer effectiveness and reliability. Such as figure 1 As shown, the specific steps are as follows,

[0041] A) Place the workpiece 18 coated with black paint 17 on the heating platform 20, and turn on the computer system 30 and the air pump 16 at the s...

Embodiment 2

[0058] Such as figure 1 shown.

[0059] A device for improving the confinement effect of laser high-temperature shot peening, which can be divided into several parts such as a focusing device, a confinement device, a workpiece platform, and a high-pressure pulse gas generating device. The focusing device includes a lens system 6 and a fixture 5, the lens system 6 is clamped on the fixture 5, the fixture 5 and the guide rail 4 are connected by a lead screw, the lead screw is rigidly connected to the output shaft of the stepping motor 3, and the step The feed motor 3 drives the jig 5 and the lens system 6 to move up and down through the screw and the guide rail 4 to realize focusing; the restraint device includes the top cover 7 and the nozzle 15, which are connected by bolts, and a rubber gasket 8 is installed in the middle to ensure the joint. Tightness, the top cover 7 clamps the high pressure resistant lens 9 on the rubber gasket 8; the nozzle 26 and the nozzle 15 are conne...

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Abstract

The invention discloses a method and a device for improving a constraint effect of laser high temperature shot blasting. The method is characterized in that surge pressure generated by high voltage pulse gas is utilized for carrying out constraint on the pressure generated by explosion of laser induced plasma, and the method can be used for solving the problem that a restraint layer such as water flow is not suitable for laser high temperature shot blasting under the condition that plasma coagulation is not influenced, overcoming the defect of local cracking or integral fracture generated on high-temperature-resistant glass due to local press, and substantially improving the effectiveness and reliability of the restraint layer for laser high temperature shot blasting. The device comprises a laser, a heating platform, a pneumatic pump, an accumulator, an electromagnetic switch, a computer system and the like. The method and the device provided by the invention have the advantages that the application range is wide, and the constraint effect is good.

Description

technical field [0001] The invention relates to a laser shock forming technology, especially a high-temperature laser shock forming method and device suitable for the impact forming temperature in the range of 100-450°C, specifically a high-pressure pulse gas as a confinement medium to A method and device for improving the confinement effect of laser high-temperature shot peening. Background technique [0002] At present, laser warm shot peening, also known as temperature-assisted laser peening, is a new type of surface strengthening technology. By performing laser shock under a certain temperature effect, higher dislocation density and Dislocation entanglement, accompanied by dynamic strain aging and dynamic precipitation. These characteristics determine that laser warm shot peening can achieve a better surface strengthening effect than mechanical shot peening. At the same time, laser warm shot peening can produce more stable residual compressive stress than room temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/09C21D7/06
Inventor 黄舒孟宪凯周建忠盛杰王宏宇韩煜航朱炜立钟辉田清戴磊
Owner JIANGSU UNIV
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