SYSTEMS AND METHODS TO MITIGATE FUSION BETWEEN A WIRE ELECTRODE AND A WELDING TORCH

    公开(公告)号:US20220134462A1

    公开(公告)日:2022-05-05

    申请号:US17506818

    申请日:2021-10-21

    Abstract: Systems and methods are described to address issues associated with welding with cored wires. In certain processes, a welding wire may “stick” or fuse to a contact tip. To mitigate the negative effects of a wire fusing to a contact tip, a double pulse waveform is applied. A first pulse is applied at a first current level above a threshold current level required to transfer a ball of molten welding wire in a peak phase, and a second pulse is applied in the background phase at a second current level below the threshold current level to limit and/or eliminate fusion between the wire and the contact tip. In examples, the second current level is sufficient to dislodge a spot weld between the welding wire and the welding torch yet insufficient to transfer a ball of molten welding wire.

    METHODS AND APPARATUS FOR PULSE ARC STARTING PHASE FOR WELDING

    公开(公告)号:US20210060679A1

    公开(公告)日:2021-03-04

    申请号:US17002925

    申请日:2020-08-26

    Abstract: Provided is a system for providing pulsed arc starting phase, where the system comprises power conversion circuitry configured to convert input power to welding-type power and output the welding-type power, and control circuitry configured to control the power conversion circuitry to output the welding-type power. The control circuitry is configured to control the power conversion circuitry to output a plurality of welding current pulses during at least a portion of one or both of a run-in period or a ramp period for wire feeding of a welding wire ends, where each of the plurality of welding current pulses is associated with a respective pulse period and a respective pulse duty cycle.

    ALUMINUM METAL-CORED WELDING WIRE
    25.
    发明申请

    公开(公告)号:US20190210162A1

    公开(公告)日:2019-07-11

    申请号:US16358415

    申请日:2019-03-19

    Abstract: The present disclosure relates to a metal-cored welding wire, and, more specifically, to a metal-cored aluminum welding wire for arc welding, such as Gas Metal Arc Welding (GMAW) and Gas Tungsten Arc Welding (GTAW). A disclosed metal-cored aluminum welding wire includes a metallic sheath and a granular core disposed within the metallic sheath. The granular core includes a first alloy having a plurality of elements, wherein the first alloy has a solidus that is lower than each of the respective melting points of the plurality of elements of the first alloy. The granular core comprises aluminum metal matrix nano-composites (Al-MMNCs) that comprise an aluminum metal matrix and ceramic nanoparticles.

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