Laser head height adjusting device and method based on CCD (charge coupled device) vision

Abstract

The invention relates to a laser head height adjusting device and a laser head height adjusting method based on CCD (charge coupled device) vision. The laser head height adjusting device based on CCD vision comprises a machining platform, a clamping device, a laser head and a CCD camera, wherein the clamping device is arranged above the machining platform and comprises a transverse clamping connecting part and a longitudinal clamping connecting part which are mutually pivoted; the laser head is arranged on the pivoted transverse clamping connecting part of the clamping device and is arranged above the machining platform; and the CCD camera is pivoted on the pivoted longitudinal clamping connecting part of the clamping device, and the angle between the CCD camera and the longitudinal clamping connecting part is adjustable. The laser head height adjusting device and the laser head height adjusting method based on CCD vision have the advantages that the laser machining quality can be guaranteed, the machining accuracy is improved and the situation of position change of a focal point can be determined rapidly and conveniently.

Description

technical field [0001] The invention relates to a laser-assisted processing method, in particular to a CCD vision-based laser head height adjustment device and adjustment method. Background technique [0002] When using a laser to process a workpiece, the position of the laser spot is generally determined by a helium-neon laser, especially when welding or cutting a larger workpiece, such as tailor welding of a large plate, because the plate surface cannot be guaranteed to be flat, which will cause laser During the welding process, the defocus of laser welding parameters changes, which requires the operator to measure the height of the laser head after a period of time, so as to prevent a large change in the defocus, which will deteriorate the welding performance and make the processed The workpiece does not meet the requirements. At present, a ruler is used to measure the distance between the workpiece and the lens to calculate the defocus amount. This is a large workload, a...

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Problems solved by technology

[0002] When using a laser to process a workpiece, the position of the laser spot is generally determined by a helium-neon laser, especially when welding or cutting a larger workpiece, such as tailor welding of a large plate, because the plate surface cannot be guaranteed to be flat, which will cause laser During the welding process, the defocus of laser welding parameters changes, which requires the operator to measure the height of the laser head after a period of time, so as to prevent a large change in the defocus, which will deteriorate the welding performance and make the processed The workpiece does not meet the requirements. At present, a ruler is used to measure the distance between the workpiece and the lens to calculate the defocus amount. This is a large workload, and there are also large differences between multiple measurements, resulting in welding or cutting. Decreased precision greatly affects welding or cutting quality

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