Method and equipment for forming plate of moderate thickness through laser shot blast

Abstract

A laser blasting apparatus for shaping on the surface of medium-thick plate is composed of laser device, optical guide system, laser blasting head, fixture system for workpiece, and control system. Its shaping process includes computer simulation of the stress field distribution according to the curved surface shape to be processed, optimizing it to obtain the distribution of shock wave pressure and blasting tracing on the surface of plate, automatically choosing the parameters of laser pulse optical beam converte and optical mask, writing control program, generating strong short laser pulses, covering them to several pulse clusters, passing through optical mask, acting on energy converting body on the surface of workpiece to obtain shock waves, acting on the surface of workpiece for shaping.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a plate forming method and device based on high-energy pulse laser peening technology, which is suitable for the forming process of medium-thick plate parts with smooth curvature requirements. It is especially suitable for the processing of small-curvature formed parts of medium-thick plates that are difficult to form or cannot be formed at all by conventional methods. Background technique [0002] Plate forming parts are used in a wide range of applications in the aerospace and defense industries. Large-scale structural components on aircraft, such as wings, skins, integral panels, and turbine engine blades, require precise and complex curvature shapes and maintain the original shape of the material in order to withstand effective structural loads and meet aerodynamic performance. Structural characteristics; the forming process of missiles, rockets in the defense industr...

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Problems solved by technology

Since the laser shock forming process is accompanied by surface strengthening, the yield strength of the plate is increased, and subsequent deformation is difficult, resulting in poor plastic flow of the material in the overlapping area, the thickness of the plate that can be formed is limited, and the surface roughness cannot be guaranteed. For forming medium and thick plates with smooth curvature requirements

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