Laser focus spot positioning method and device

Abstract

The invention provides a laser focusing spot positioning device which comprises a machine tool at least provided with an X axis, a Y axis, a Z axis and a workbench, a scanning head arranged on the Z axis, a focusing lens arranged below the scanning head, a clamp used for clamping a standard block to be positioned and a sensor. The workbench is arranged on the X axis and the Y axis and moves through the X axis and the Y axis. The clamp and the sensor are both arranged on the workbench. The sensor acquires coordinates of a laser focusing spot formed by focusing of the focusing lens. The invention further provides a laser focusing spot positioning method. The position of the laser focusing spot and the position of a machined area of a workpiece coincide with each other in a non-contact manner, and the problem that in contact type measurement, positioning of the machined workpiece is not accurate is solved so that high-precision machining and positioning can be achieved. The laser focusing spot positioning device is simple in structure and easy to operate to achieve the laser focusing spot positioning method.

Description

Technical field [0001] The present invention relates to the technical field of laser processing, in particular to a laser focusing spot positioning method and device. Background technique [0002] Laser processing is to use the focused spot (ie "light knife") of the light beam after the focusing lens to process parts. Laser processing requires no tools. After the beam is focused by the focusing lens, the energy is highly concentrated. It can be used as a light knife to perform drilling, cutting, welding, complex curved surface etching, ultra-fine processing, etc., with high processing speed, small surface deformation, and A wide range of processing materials. [0003] In the laser processing process, the positioning of the laser beam focusing spot is a key factor affecting processing quality and processing efficiency. In some traditional processing equipment, the positioning of the processing position is generally carried out by directly interacting with the workpiece, or by dire...

AI Technical Summary

Problems solved by technology

The difference from traditional machine tools is that the current laser processing system requires a lot of energy and requires high processing quality of the workpiece. The energy density of the laser focus spot (light knife) is high and the thermal effect is large. The contact method commonly used in traditional machine tools, due to its operation The steps are cumbersome and the cost of the workpiece is high, which is not applicable to the laser processing industry

Especially when the position accuracy of the processed area is high, the positioning accuracy of the spot directly affects the positioning accuracy of the processed area. The traditional spot positioning technology can no longer meet the needs of the laser processing industry.

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