Repair welding monitoring feedback method and system for GTAW arc fuse additive manufacturing arc quenching position

Abstract

The invention discloses a repair welding monitoring feedback method and system for a GTAW arc fuse additive manufacturing arc quenching position. According to the method and system, an industrial camera collects a current image in real time and sends the current image to an industrial personal computer; the industrial personal computer is used for height calculation according to the image collected by the industrial camera and comparing the result with a threshold value; and according to a comparison result, a robot is controlled to perform stacking or start arc end collapse warning, and the robot is controlled to perform repair welding. The monitoring method is visual and flexible and can be used for detecting and adjusting the height of tungsten electrodes. The method effectively overcomes the defect that heat input accumulation which is difficult to solve during GTAW front wire feeding causes webbing of the arc quenching position, has the advantages of being visual and flexible in detection process and rich in information, and lays a solid foundation for improving the forming quality and precision of GTAW additive manufacturing.

Description

technical field [0001] The invention belongs to the field of additive manufacturing of arc fuses, and in particular relates to a method for monitoring and feedbacking repair welding at arc extinguishing places of additive manufacturing of GTAW arc fuses. Background technique [0002] Wire and Arc Additive Manufacturing (WAAM) is an advanced manufacturing technology that uses an arc as a heat source, and relies on numerical control technology to transport welding wires and gradually accumulate and form metal components according to the CAD model of the entity. Among them, GTAW additive manufacturing is an important branch of WAAM. This technology has the advantages of stable arc, small heat input, small spatter and high forming precision. It is currently widely used in direct manufacturing of copper alloy, aluminum alloy, and nickel-based alloy components. [0003] GTAW additive manufacturing generally uses the front wire feeding method for accumulation. However, unidirectio...

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Problems solved by technology

However, unidirectional deposition will lead to the problem of collapse at the arc extinguishing point during the additive manufacturing process, which will affect the shape of the formed part. Therefore, if the collapse defect can be automatically compensated during the forming process, the height of the weld bead can be guaranteed to be uniform. , it can effectively improve the shape and characteristics of the formed part. At the same time, because GTAW additive manufacturing is very sensitive to the height of the tungsten electrode, it is often necessary to manually adjust the height of the tungsten electrode during the forming process, which is very troublesome. The basis for these two problems lies in Real-time monitoring and feedback of tungsten electrode height and welding bead height

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