Focusing positioning method based on initial laser processing position and laser processing device

Abstract

The invention discloses a focusing positioning method based on an initial laser processing position. In the method, a beam emitted by a laser is projected on the surface of a work piece to be processed to form a light spot through the optical system of the laser processing head, light spot images are promptly collected through moving the laser processing head and using a camera, the properties of the light spot images are then compared with a computer to find out a light spot image on a focal plane, and then the laser processing head is moved according to the moving distance of the laser processing head corresponding to the light spot image, thereby completing the focusing; and the position relationship between the center of the initial processing point and the center of the light spot is determined by the computer, and the laser processing head is moved according to the position relationship, thereby obtaining the accurate positioning of the initial processing position. Compared with the prior art, the invention has high accuracy in focusing and positioning of the initial processing position, and can satisfy finishing requirements. Simultaneously, the invention also discloses a laser processing device, which has the functions of auxiliary focusing and positioning, thereby facilitating the laser processing operation.

Description

technical field [0001] The invention relates to laser processing technology, in particular to a method for focusing and positioning an initial position in laser processing and a laser processing device. Background technique [0002] At present, laser processing equipment is widely used in semiconductor and microelectronics industry, automobile industry, shipbuilding industry, aerospace industry and other fields. Since the laser is processed after being focused, such as cutting, welding, drilling, etc., the relative position of the laser beam focus and the surface of the workpiece to be processed is also extremely important. Conventional laser focusing methods mainly include: burning spot method, infrared camera method, pinhole scanning method, etc. Among them, the burning spot method is the most commonly used, just take a piece of wet paper and paste it on the surface of the workpiece, which is simple and easy. But this method can only provide people with a rough focus pro...

AI Technical Summary

Problems solved by technology

But this method can only provide people with a rough focus profile, and due to the transverse heat conduction effect of the material, the burned focus pattern is distorted, sometimes blurred and inaccurate

Moreover, at present, when determining the initial position of machining, the visual method with low accuracy is used, which cannot meet the requirements of finishing machining.

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