Active laser vision steady weld joint tracking system for laser-arc hybrid welding

Abstract

The invention discloses an active laser vision steady weld joint tracking system for laser-arc hybrid welding. The system comprises a laser-hybrid welding robot, an active laser vision system, a lasersource, an image processing system and a control system, wherein the active laser vision system and the laser source are both disposed on the laser-hybrid welding robot; the image processing system is disposed in the control system; and the laser-hybrid welding robot, the active laser vision system, the laser source, and the image processing system are all connected with the control system. The active laser vision steady weld joint tracking system solves the problem that during the traditional laser-arc hybrid welding, the arc light and the spattering interference causes the weld joint tracking system to generate excessive image noise, which ultimately affects the welding quality, the welding precision and efficiency, and solves the robot tracking errors caused by the weld joint feature point trajectory deviation during the teaching process, combines the weld joint image recognition with robot motion control to realize automatic extraction and accurate intelligent tracking of weld joint features.

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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