Control method and device of laser-arc hybrid welding

Abstract

The invention relates to a control method of laser-arc hybrid welding. The control method comprises the following steps: (1) calibrating is conducted to a laser welding head and a welding seam tracker, and a transmission control protocol (TCP) point is confirmed; (2) the position of a welding gun is revised; (3) path of welding is confirmed, and then welding process parameters are set through an industrial personal computer; and (4) actual welding is conducted to the welding seam, and real-time adjustment is conducted to a filament separation distance data link adapter (DLA) through extracting current and voltage signals in the process of welding. Compared with the prior art, the control method of the laser-arc hybrid welding has the advantages of simplifying welding process greatly, achieving digital setting of each process parameter of the laser-arc hybrid welding rapidly, controlling the process of laser-arc hybrid welding accurately, and improving automatic level of composite welding, welding efficiency and adaptability. Stability of the welding process is guaranteed by a filament separation distance DLA closed-loop control system, accuracy of the welding path is guaranteed by the welding seam tracker, and perfect welding of a curve welding seam is achieved.

Description

technical field [0001] The invention relates to the field of laser-arc hybrid welding, in particular to a control method and device for laser-arc hybrid welding. Background technique [0002] Laser-arc hybrid welding is an emerging special welding technology, which has great advantages over traditional welding methods. Its characteristics mainly include: the composition of the weld metal can be adjusted through the welding wire, and the performance of the welded joint can be improved; the weld can be enlarged The adequacy of the assembly gap; the role of stabilizing the welding arc; improving the effective utilization of arc heat; high welding speed and large penetration; can reduce the formation of welding defects, etc., laser-arc hybrid welding method can Realize the welding of carbon steel, alloy steel, stainless steel, aluminum alloy, copper alloy, cast iron and dissimilar metals, etc., especially in the field of medium and thick plates such as shipbuilding, petroleum eq...

AI Technical Summary

Problems solved by technology

[0002] Laser-arc hybrid welding is an emerging special welding technology, which has great advantages over traditional welding methods. Its characteristics mainly include: the composition of the weld metal can be adjusted through the welding wire, and the performance of the welded joint can be improved; the weld can be enlarged The adequacy of the assembly gap; the role of stabilizing the welding arc; improving the effective utilization of arc heat; high welding speed and large penetration; can reduce the formation of welding defects, etc., laser-arc hybrid welding method can Realize the welding of carbon steel, alloy steel, stainless steel, aluminum alloy, copper alloy, cast iron and dissimilar metals, etc., especially in the field of medium and thick plates such as shipbuilding, petroleum equipment manufacturing, and nuclear power equipment manufacturing. However, There are many process parameters for composite welding. In actual production, the accuracy of process parameter setting has a great influence on the welding effect

[0003] In the modern manufacturing industry, the requirements for automation are getting higher and higher, especially in the welding of complex structural parts. The use of six-axis industrial robots equipped with composite welding heads for welding is an inevitable trend in the development of welding technology in the future, but side-axis laser- The hybrid arc welding head has a directionality problem. When welding complex curves, the robot needs to change its posture greatly, and the current seam tracking system can only correct the position coordinates (X, Y, Z) of the robot, but cannot correct the posture coordinates (A , B, C), at present, the positioning accuracy of industrial six-axis robots and the accuracy in the welding process of large posture and small displacement are low. This invention aims at the directionality problem of the paraxial laser-arc hybrid welding joint, and realizes the curve through the weld seam tracker Perfect Welding of Weld Seams

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