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Method and device for laser peening correction size precision online control for welded metal plate

A laser shot peening and sheet metal technology, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve problems such as difficult control of precision, no laser shot peening research, etc., to improve fatigue strength, wide application range, Efficient effect

Active Publication Date: 2016-12-14
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can control and reduce welding deformation to a certain extent, but there are various deficiencies, and the precision is more difficult to control. Therefore, a method for correcting the shape of welded metal sheets with high efficiency, simple operation, strong applicability and high precision is proposed has good practical significance
[0004] In recent years, the in-depth study of laser peening technology has provided a solution to some problems in welding correction. In June 2002, Hackel et al. of the University of California in the United States proposed the use of laser peening strengthening equipment in the US national patent. Principles of three-dimensional bending of sheet metal and methods of precise forming, but no further research on laser peening

Method used

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  • Method and device for laser peening correction size precision online control for welded metal plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for on-line control of dimensional accuracy of laser shot peening correction of welded metal sheets, the specific steps of which are as follows:

[0027] Step 1: Coordinate alignment of the 3D results obtained from the actual test with the 3D CAD model of the product with the help of a 3D contour scanner, and perform comparative analysis to obtain the visualization results of the deformation of the entire part, and further determine the deformation amount of the part to be corrected and the correction path ;

[0028] Step 2, establish the relationship between the test parameters and the amount of deformation through the test, and obtain the database of the corresponding relationship between the intensity of the laser shot peening correction and the amount of deformation. The laser peening strength of the shape correction part;

[0029] Step 3, using laser shot peening equipment, according to the laser shot peening shape correction intensity and shape correctio...

Embodiment 2

[0032] see Figure 1-2 , a device for on-line control of dimensional accuracy by laser shot peening of welded metal sheets, including a computer control system (1), a laser power supply (2), a high-power pulse laser (3), a light guide and optical path adjustment system (4), and a reflector Mirror group (5), perspective mirror group (6), weldment (7), fixture (8), manipulator (9), dynamic optical monitoring system (10), lighting source (11), measuring camera (12), dynamic Monitoring and control system (13), clamping control system (14), constraining layer water spraying system (15), water layer control system (16), energy absorbing layer (17), developer (18), and computer control system (1) Laser power supply (2), dynamic monitoring control system (13), clamping control system (14), water layer control system (16) are connected to each other; fixture (8) is fixed on the manipulator (9).

[0033] The front of the laser peened weldment is coated with an energy-absorbing layer of...

Embodiment 3

[0038] One aspect of the present invention provides a device for on-line control of the size accuracy of laser shot peening of welded metal sheets, which includes a computer control system (1), a laser power supply (2), a high-power pulse laser (3), light guide and Optical path adjustment system (4), mirror group (5), perspective mirror group (6), weldment (7), fixture (8), manipulator (9), dynamic optical monitoring system (10), lighting source (11) , measuring camera (12), dynamic monitoring control system (13), clamping control system (14), constrained layer water spray system (15), water layer control system (16), energy absorbing layer (17), developer ( 18); It is characterized in that, wherein the computer control system (1) and the laser power supply (2), the dynamic monitoring control system (13), the clamping control system (14) and the water layer control The system (16) is electrically connected; the laser power supply (2) is electrically connected to the high-power...

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Abstract

The invention provides a method and device for laser peening correction size precision online control for a welded metal plate. A laser machine emits a laser beam, the laser beam is transmitted to a workpiece welding area through a light path system, a water limiting layer covers the welding area, and a limiting layer is formed. Under the action of laser pulse, impulse waves are formed on the welding surface, residual compressive stress is generated in the welded metal plate, and the residual compressive stress is eliminated. Efficiency of laser penning is high, a deep residual compressive stress layer can be generated, size correcting efficiency is high, the size correcting makes the surface and a certain depth range of a peening area of a welded piece to be subjected to plastic deformation, the straightening purpose is achieved, and meanwhile, fatigue strength of a welded joint is improved. According to the method and device for the laser peening correction size precision online control for the welded metal plate, precise size correcting can be conducted on the welded piece, working efficiency is high, controllability is good, and the range of application is wide.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to an on-line control method and device for dimensional accuracy of laser shot peening shape correction of welded metal sheets, which is especially suitable for precise shape correction of large and complex welded structural parts. Background technique [0002] A large number of important products in industrial production, such as aviation, ships, automobiles, construction and other manufacturing industries are inseparable from welding technology. Welding residual stress and welding deformation will seriously affect the manufacturing process itself and the performance of the welded structure. Therefore, measures should be taken Various effective measures minimize welding residual stress and welding deformation, or eliminate them after welding. [0003] At present, methods such as annealing to eliminate welding deformation, mechanical correction, rigid fixation, prestressing, ...

Claims

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Application Information

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IPC IPC(8): B23K26/356B23K26/70B23K26/03B23K26/18
CPCB23K26/03B23K26/18B23K26/356B23K26/3568B23K26/707
Inventor 张永康朱然张永俊
Owner GUANGDONG UNIV OF TECH
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