Laser machining method and device applicable for complicated curved surface

Abstract

The invention provides a laser machining method applicable for a complicated curved surface. By adopting processing steps of dividing the complicated curved surface into curved surface sheets and establishing a coordinate system of each curved surface sheet, the subsequent processing steps of dividing sub blocks and machining pattern parallel projection can be implemented according to the coordinates of the curved surface sheets respectively, so the limit that a machining molded surface backing to a laser incident direction or a steep surface parallel to an optical axis direction cannot be machined because only one coordinate system is adopted to perform whole injection in the prior art can be overcome, the machining efficiency is improved and the machining applicable range is extended. The invention also provides a laser machining device. The laser machining device has a three-axis laser machining head structure provided with a two-axis laser polarization mirror and a Z-axis mobile mechanism, so the problem that the conventional system depends on a three-axis lathe is solved; therefore, a machining unit is independent and compact, and is easy to assemble and disassemble; the conventional five-axis linkage milling machine can be changed into a laser-etching machining lathe so that the functions are compatible; and the laser machining device has a significant practical value.

Description

technical field [0001] The invention belongs to the application field of laser processing, and in particular relates to a laser processing method and device suitable for secondary precision processing on the surface of complex curved parts. Background technique [0002] In aerospace, automobile, energy, petrochemical, power, military defense and other industries, parts with complex curved surfaces are widely used, such as aircraft wings, marine propellers, engine blades, automotive panel molds, large diesel engine crankshafts, etc. , the shape surfaces are all space complex surfaces. [0003] In order to obtain beautiful, wear-resistant, corrosion-resistant or special electromagnetic properties, secondary precision machining is often required on the surface of complex curved parts, such as etching various texture patterns on the surface of complex curved hard alloy molds, and complex curved surface radar The surface of the insulating substrate is precisely coated with condu...

AI Technical Summary

Problems solved by technology

[0013] The invention provides a laser processing method suitable for complex curved surfaces, which solves the limitations of the existing "3+2 axis" laser galvanometer projection processing technology using a single coordinate system for overall projection and only based on discrete point cloud data models, and Improve processing efficiency and expand the scope of application

[0014] The invention also provides a laser processing device, which solves the problem that the Z-axis laser focus adjustment function of the existing "3+2-axis" projection processing system must rely on the cooperation of the three-axis machine tool, the processing head is not easy to disassemble and install, and the applicability is not high. , the processing head used in this processing device can be combined with a variety of commercial CNC machine tools for processing. It has the advantages of modular processing unit, easy disassembly and assembly, simple and reliable process, high flexibility, and strong applicability to various curvature complex surface parts.

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