Real-time zooming laser welding method

Abstract

The invention discloses a real-time zooming laser welding method. The method comprises the steps that a welding head mechanical mechanism is designed; a radar sensor welding surface measuring system is designed; and a radar sensor measurement system is designed, wherein acquired three-dimensional point cloud data are processed through an upper computer design manner, an image is processed, threshold segmentation is conducted on the image, external factor interference is removed during laser welding, only a data value of a plane is adopted, connectivity analysis is conducted on a region obtained after threshold processing, a region with smaller area is removed, and mean value processing and differential comparison are conducted on the finally obtained region, and an optimal height value isoutput. According to the laser welding method, the welding focal length is guaranteed, a welding surface is detected in real time, a focusing lens in a laser head is adjusted, the response speed is high, vibration of a machine table is reduced, the welding consistency is improved, and the rejection rate of products is reduced.

Description

technical field [0001] The invention belongs to the field of laser welding, and in particular relates to a laser welding method with real-time zooming. Background technique [0002] At present, when laser welding products, when the welding process is fixed, if the welding focal length changes, it will directly cause bad phenomena such as virtual welding. The traditional way to solve this problem is to use point laser ranging, measure the height before welding, and move the Z-axis height of the laser welding head to realize height deviation compensation. Since only one point is measured, if the welding surface is uneven, it will also cause poor welding due to inconsistent height. At the same time, since the measurement system and the welding system are independent of each other, it is not conducive to the rapid integration of the integrator, which increases the periodicity and uncontrollability of the project. Limited by the laser focal length, when the height of the produc...

AI Technical Summary

Problems solved by technology

Since only one point is measured, if the welding surface is uneven, it will also cause poor welding due to inconsistent heights

At the same time, since the measurement system and the welding system are independent of each other, it is not conducive to the rapid integration of the integrator, which increases the periodicity and uncontrollability of the project

Limited by the laser focal length, when the height of the product plane changes, it is easy to cause false welding of the product, resulting in poor welding

The shaking of the equipment table caused by the movement of the laser head also increases the defective rate of welding

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