Underwater laser shock non-die incremental forming device and method

Abstract

The invention provides an underwater laser shock non-die incremental forming device and method. The underwater laser shock non-die incremental forming device comprises a computer, a laser emitting system, a laser distance measuring system and a workpiece bearing system; a laser beam emitted by a femtosecond laser device of the laser emitting system is reflected to a beam splitter through a plane mirror, and then, the focus of the laser beam is located in the H position above the surface of a workpiece through a focusing lens; the laser beam emitted by the femtosecond laser device is reflectedto the beam splitter through the plane mirror, and then, the focus of the laser beam is located in the H position through the focusing lens; and after receiving a signal fed back by a laser distance measuring instrument, the computer calculates and displays the distance between the light emergence spot of the focusing lens and the H position, and the computer controls the H position to be in the position 1-1.5 mm above the surface of the workpiece. According to the underwater laser shock non-die incremental forming device and method, femtosecond laser breaks down water and induces shock wavesto serve as a force source, through the nonlinear absorption characteristic of a transparent medium to laser ultrafast in focusing, the water serves a restraint layer and also serves an absorption layer, that is, the restraint layer and the absorption layer are integrated, and workpiece incremental forming is achieved.

Description

technical field [0001] The invention relates to the fields of laser shock forming and progressive forming, in particular to an underwater laser shock progressive forming device and method without molds. Background technique [0002] Microplastic forming is an important technology for manufacturing tiny metal parts, and it is playing an increasingly important role in emerging strategic fields such as industrial sensors, MEMS, and micro-robots. However, conventional microplastic forming requires a tiny mold, which not only increases the manufacturing cost and prolongs the product development cycle, but also the friction between the mold and the material, the strict alignment requirements of the micro-concave and convex molds, and the difficulty of demoulding after forming have become limitations. Technical obstacles to the development of plastic forming. In incremental forming, the size and performance of the resulting target part are mainly determined by the force and relati...

AI Technical Summary

Problems solved by technology

Although this method takes into account the inconvenience of directly coating the absorbing layer on the surface of the workpiece, the shock wave pressure transmitted to the surface of the workpiece is reduced due to the attenuation of the medium water, and the elastic film belt itself also has a certain attenuation effect on the peak value of the shock wave pressure, so , the forming effect is greatly weakened

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