An Active Laser Vision Robust Seam Tracking System for Laser-Arc Hybrid Welding

Abstract

The invention discloses an active laser vision robust seam tracking system for laser-arc hybrid welding, comprising: a laser-hybrid welding robot, an active laser vision system, a laser light source, an image processing system and a control system, the active laser Both the vision system and the laser light source are located on the laser-hybrid welding robot, the image processing system is located in the control system, and the laser-hybrid welding robot, active laser vision system, laser light source, and image processing system are all connected to the control system ; It solves the problem that the welding seam tracking system produces too much image noise caused by the interference of arc light and spatter during the existing laser-arc hybrid welding, which ultimately affects the welding quality, welding accuracy and efficiency, and solves the problem caused by the deviation of the trajectory of the welding seam feature points in the teaching process To solve the problem of robot tracking errors, the welding seam image recognition is combined with the robot motion control to realize automatic extraction of welding seam features and accurate intelligent tracking.

Description

technical field [0001] The invention belongs to the technical field of laser welding, and in particular relates to an active laser visual seam tracking system and a tracking method for laser-arc hybrid welding. Background technique [0002] Laser welding is widely used in industrial production, and the limitations of laser welding technology are becoming more and more prominent. The main manifestations are: the low utilization rate of laser welding energy, the increase of welding thickness leads to the increase of production cost; Weak bridging ability; due to strong metal vaporization, laser welds are prone to undercuts, depressions, and pores, and it is difficult to eliminate them through process parameter adjustment; the cooling rate of laser welding is too high, and the welds are prone to form brittle phases. and lower toughness. Therefore, laser-arc hybrid welding has received extensive attention, combining laser welding and arc welding to achieve high-quality and effi...

AI Technical Summary

Problems solved by technology

However, it is easily interfered by arc light and spatter. The smaller the distance between the measurement point and the welding point, the stronger the arc light and spatter noise. These factors interfere with the visual system and increase the difficulty of the weld seam tracking system.

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