Method and apparatus of continuous collision reinforcement by laser

Abstract

The present invention relates to special machining and manufacture technology, and is especially continuous impacting high energy short pulse laser apparatus and process for reinforcing metal material. The apparatus is provided with sliding block, flexible working film, cushion block, liquid exhausting piston and other parts to form a flowing constraint liquid medium layer capable of being replaced automatically through liquid inflow in the liquid inlet and the liquid outflow in the liquid outlet. The present invention has properly designed system to integrate the constraint liquid medium essential for laser impacting and the coating skillfully, so as to realize continuous laser impact reinforcing treatment without needing constraint layer fixing and coating. The present invention can also realize online assembling or repairing impact reinforcement.

Description

technical field [0001] The invention relates to the field of special processing and manufacturing, in particular to a device and method for continuous impact strengthening of metal materials or workpieces using high-energy, short-pulse laser beams as energy. Background technique [0002] Laser shock strengthening technology is to use high power density and short pulse laser to irradiate the surface of metal materials, and form plasma high-pressure shock waves on the surface (or coating), so that the surface of the part material produces plastic deformation and residual compressive stress of several hundred MPa, thereby Improve the fatigue resistance of metals to achieve the purpose of prolonging the fatigue life of parts. [0003] The early application research of laser shock peening technology originated from the emphasis on the reliability and safety of aircraft structures in the 1960s. The key parts of the aircraft, such as the typical stress concentration structure on t...

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Problems solved by technology

The key problem here is that when the water flow passes through the surface of the workpiece or material, it is easy to form a number of small eddies or small bubbles, and it is easy to form a beam focusing effect on the strong laser beam, thus affecting the laser shock effect.

[0007] At the same time, the laser impact coating they use is pre-coated or sprayed on the surface of the area to be impacted. It is difficult to control the thickness of the pre-fabricated coating. It takes a certain time for the coating to dry, and it needs to be cleaned again after the impact treatment. Laser shock is not efficient overall

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