Single-power multi-wire welding machine and its control method for alternation of non-extinguishing welding wire

Abstract

The invention discloses a single-power supply multi-wire welding machine and a non-extinguishing arc welding wire alternate conversion control method thereof. The single-power supply multi-wire welding machine comprises a wide welding code inversion power supply, a conventional welding wire feeding machine, a fine welding wire short-distance wire feeding machine and a single-electric conducting nozzle double-wire or multi-wire welding gun; the wide welding code inversion power supply is connected with the conventional welding wire feeding machine and the fine welding wire short-distance wire feeding machine through wire feeding machine control cables; the conventional welding wire feeding machine and the fine welding wire short-distance wire feeding machine are respectively connected to the single-electric conducting nozzle double-wire or multi-wire welding gun through a thick wire feeding pipe and a short-distance fine wire feeding pipe; the single-electric conducting nozzle double-wire or multi-wire welding gun and one pole of an output electrode of the wide welding code inversion power supply are connected through a welding cable attached with a shielding gas hose; and the other pole of the output electrode of the wide welding code inversion power supply is connected with welded parent metal through a parent metal connecting cable. Welding wires can be randomly converted to continuously weld without extinguishing arc in the welding process; and the welding arc can be naturally transited at the end parts of two welding wires.

Description

technical field [0001] The invention relates to a double-wire or multi-wire gas metal shielded welding (GMAW), in particular to a single-power multi-wire welding machine and a non-extinguishing welding wire alternation control method thereof. Background technique [0002] Gas metal arc welding (GMAW) is a mature welding method, which uses continuously fed welding wire as the melting electrode, uses the arc formed between the wire end and the wire as the heat source, and uses CO 2 Or inert gas as the welding method of shielding gas. The GMAW method is widely used in the field of industrial production and manufacturing because of its low equipment cost, good connection forming quality, and reliable performance. On the basis of GMAW, twin-wire and multi-wire welding equipment also appeared. Its main purpose is to improve welding efficiency, that is, two sets of welding power sources are used to form a welding system with two or more sets of wire feeding mechanisms. Output at ...

AI Technical Summary

Problems solved by technology

[0003] However, the current existing welding equipment can only change the welding process parameters within a certain range, and cannot change the welding wire diameter and matching welding process at any time during the welding process according to the needs.

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