A micro-gap welding seam tracking method, system and control terminal

Abstract

The embodiment of the invention provides a micro-gap weld seam tracking method and system and a control terminal. The method includes the steps that S1: an interferometer is controlled to emit light beams to a weldment; S2: the distances between multiple interference measuring units, located on the same horizontal plane, in the interferometer and the weldment are adjusted, and meanwhile the interference light intensities measured by all the interference measuring units are acquired, wherein when the distances between the interference measuring units and the weldment are equal to a preset distance, the interference light intensities of the interference measuring units are highest; S3: in the relationship between the positions of all the interference measuring units and the interference light intensities, a weld seam of the weldment is reconstructed according to the positions of all the interference light measuring units at the highest interference light intensities; S4: the weldment ismoved according to the position deviation between the reconstructed weld seam and a preset weld seam, and a laser unit aligns at the weld seam of the weldment; and S5, S1 is executed again till the weld seam on the weldment is tracked.

Description

technical field [0001] The invention relates to the technical field of micro-gap welds, in particular to a micro-gap weld tracking method, system and control terminal. Background technique [0002] For laser welding technology, seam identification and tracking are part of the sensing part of automatic welding control, which is the premise of realizing welding automation. [0003] The realization method of weld seam tracking is usually a visual sensing method, which usually uses structured light or scanning laser to detect the weld seam, both of which use the principle of optical triangulation measurement to obtain accurate distance, which is based on traditional triangulation measurement , the depth information of the point to be measured is calculated by the angle change produced by the offset of the point to be measured relative to the optical reference line. However, in the detection of micro-gap welds, it is difficult to extract the position information of micro-gap wel...

AI Technical Summary

Problems solved by technology

However, in the detection of micro-gap welds, it is difficult to extract the position information of micro-gap welds due to the slight deformation of the structured light beam or the scanning line of the scanning laser at the weld.

Images