Focal position determining apparatus, method and device for laser processing

Abstract

The invention provides a focal position determining apparatus, method and device for laser processing and relates to the technical field of laser processing. The focal position determining apparatus for laser processing comprises a laser processing head with an annular wall, a focusing lens, a CCD coaxial field-of-view monitor and multipath laser instruction generators; the focusing lens is arranged in the laser processing head with the annular wall; the multipath laser instruction generators are arranged on the periphery of the annular wall so as to be used for emitting multiple paths of laser instruction light to shine the surface of a workpiece; the multiple paths of laser instruction light can be overlapped in a laser processing focal position; the CCD coaxial field-of-view monitor is arranged at the upper end of the laser processing head with the annular wall so as to monitor the overlapping situation information of the multiple paths of laser instruction light on the surface of the workpiece; and the focal position of laser processing is determined through the overlapping situation information. By means of the focal position determining apparatus, method and device for laser processing, the problems of easily and efficiently determining the laser focal position in the laser processing process and improving the quality and efficiency of laser process can be solved.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a focus position determination device, method and device in laser processing. Background technique [0002] At present, due to its high energy density, small welding deformation, easy integration, automation and flexibility of the welding process, high-precision and high-efficiency welding, laser processing technology has been widely used in aerospace, automobile, machinery manufacturing and other fields in recent years. Wide range of applications. In the field of laser processing, it is generally believed in the field that the distance between the laser focus and the workpiece to be processed (i.e. defocus Δf) in laser processing is one of the key factors affecting the quality of laser welding, which directly affects the internal Pores are formed with the surface. In aerospace products, there are generally high requirements for the fatigue life of structural parts, so...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a focus position determination device, method and device in laser processing to solve the problem of how to simply and efficiently determine the laser focus position during laser processing and improve the quality and efficiency of laser processing

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