Double-beam welding seam tracking control system

Abstract

The invention discloses a double-beam welding seam tracking control system used for tracking control of a three-dimensional T-type welding seam. The system comprises a man-machine interaction port, a double-beam welding controller, a drive amplifying unit, two welding seam tracking sensors and a welding seam tracking control port. A double-beam welding motion controller is used for finishing welding motion control, a welding motion signal transmitted by the double-beam welding motion controller controls an arc plate to move in a correct posture after being amplified by the drive amplifying unit, crossed sliding tables on the left and the right of the arc plate are provided with laser welding heads which enable two beams of laser which is obtained through light splitting and has an identical parameter to be transmitted to the two sides of the three-dimensional T-type welding seam, and accordingly double-beam laser welding control is achieved; the welding seam tracking sensors detect whether the position of the welding seam is deviated from a view area in real time and transmit a detection signal to the welding seam tracking control port while double-beam laser welding is carried out, the detection signal is processed by the welding seam tracking control port and then is fed back to the double-beam welding controller, and accordingly welding deviation correcting is achieved, and welding accuracy is improved.

Description

technical field [0001] The invention relates to the field of numerically controlled machine tool welding, and specifically refers to a double-beam welding seam tracking control system. Background technique [0002] Welding engineering occupies an important position in the manufacturing industry, and it is the third largest engineering after assembly and cutting in the machinery manufacturing industry. [0003] The ribbed panels in aviation, automobile manufacturing and shipbuilding industries usually adopt T-joint structure. The quality and efficiency of laser welding of T-joint directly affects the development speed of these industries and the application and promotion of laser welding technology. Generally, under unconstrained conditions, laser welding of high-strength aluminum alloy T-joint structures is prone to problems such as deformation, porosity, cracks, and weld formation. Complex three-dimensional T-shaped welds also have difficulties in determining the processing...

AI Technical Summary

Problems solved by technology

Generally, under unconstrained conditions, laser welding of high-strength aluminum alloy T-joint structures is prone to problems such as deformation, porosity, cracks, and weld formation. Complex three-dimensional T-shaped welds also have difficulties in determining the processing path and low path fitting accuracy. Problems such as large amount of deformation

[0004] At present, there are serious deficiencies in the equipment for T-shaped weld welding: ① The three-dimensional T-shaped weld is complex and changeable, and it is difficult to process. Now most of the robots drive the laser welding head for welding. The robot has low processing accuracy and poor fitting for the three-dimensional path. It is difficult to process, which is an inherent defect of the robot system. This defect is more prominent for high-precision three-dimensional complex T-shaped welds. ②For T-shaped welds, one side of the T-shaped seam is generally welded first, and then the other side is welded.

This processing method causes two disadvantages. One is to repeat the processing twice, and repeatability errors are inevitable; the other is to weld one side first, and the welding deformation caused by the temperature change of the weldment has already occurred, and the welding path when welding the other side has changed, which reduces the welding accuracy on the other side and deteriorates the manufacturability. It has become an unavoidable problem to fundamentally innovate the welding control system; ③In actual production, due to the processing and installation errors of the workpiece, and the thermal Deformation, etc., often make the teaching path deviate from the weld. For high-precision three-dimensional complex T-shaped welds, even small stress deformations may affect the welding accuracy. It is difficult to meet the requirements of high-quality welding. Finding novel detection methods is the key meaningful

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