3D additive repair device for laser-arc hybrid welding and repair method

Abstract

The invention discloses a 3D additive repair device for laser-arc hybrid welding and a repair method. The 3D additive repair device comprises a controller, a four-axis linkage platform, a laser vision sensor, an infrared vision sensor, a fixture, a laser welding torch, an arc welding torch, a filling welding wire, a wire reel and a gas guide pipe. The method includes the steps that a defective workpiece is mounted on a repair workbench; the laser vision sensor is driven to scan the three-dimensional profile of a defect; the three-dimensional profile of the defect is rebuilt through the controller; welding parameters are confirmed; the controller drives the near-infrared vision sensor to scan a molten pool, the time-frequency parameter of an image of the molten pool is obtained, a compensation control code is generated according to the time-frequency parameter of the image of the molten pool, and the set welding parameters are corrected in real time; and after repair is completed, the laser vision sensor is driven again to scan the three-dimensional profile of the defect, whether the repaired workpiece meets the standard or not is confirmed, and if not, the defect is repaired again till the repaired defect meets the standard. The 3D additive repair device for laser-arc hybrid welding and the repair method have the beneficial effects that the structure is simple, operation is convenient, and reliability and adaptability are high.

Description

technical field [0001] The invention relates to the technical field of additive repairing, in particular to a 3D additive repairing device and a repairing method for laser and MAG / MIG arc hybrid welding. Background technique [0002] The existing additive repair methods mainly include laser cladding, arc surfacing, electroplating, thermal spraying technology, etc. Laser cladding technology is a method of using a high-energy-density laser beam to fuse it with a thin layer on the surface of the substrate to form a metallurgically-bonded cladding layer on the surface of the substrate. Arc surfacing is the use of welding rods or electrodes to deposit on the surface of the substrate for surfacing. Electroplating technology uses direct current to pass through the electrolyte to produce electrochemical reactions to achieve metal deposition on the surface of the plated parts. Thermal spraying is a technology that uses a certain heat source to heat powdery or filamentary metal or n...

AI Technical Summary

Problems solved by technology

[0003] The above repair methods have certain limitations, among which laser cladding technology will lead to stress concentration in the transition zone; electroplating technology has the problem of insufficient coating bonding strength and its own strength; the heat-affected zone of arc surfacing technology and thermal spraying technology Large, easy to cause workpiece deformation

In addition, the above-mentioned repairing technology fails to accurately obtain the defect contour parameters before repairing, resulting in certain defects in the repaired workpiece, and the repairing effect is not ideal

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