Non-contact arc ignition method and device for mig welding assisted by tig arc

An arc striking device and non-contact technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of many arc striking times and short total welding time, and achieve the effect of fast arc striking and ensuring arc striking performance.

CN108098117BActive Publication Date: 2020-04-10TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-04-10

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Abstract

The invention discloses a TIG arc assisted MIG welding noncontact arc ignition method and device. The method comprises the steps that TIG welding is started, and a TIG arc is ignited; and after the TIG arc is set up, MIG welding adopting direct current reverse polarity is started, after the non-load voltage of MIG welding is loaded, along with the situation that an MIG welding wire is fed towardsa workpiece or feeding of the MIG welding wire is not started yet, a discharge channel extends out of the tail end of the MIG welding wire and develops to a TIG arc area, and therefore a clearance between the tail end of the MIG welding wire and the TIG arc is broken down; and the MIG arc is subjected to noncontact ignition through the discharge channel. According to the method, arc ignition is fast and reliable, no welding splash is generated in the whole arc ignition process, and the arc ignition performance of MIG welding is ensured.
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Description

technical field

[0001] The invention relates to the field of welding technology, in particular to a TIG (Tungsten Inert Gas Welding, non-melting inert gas tungsten shielded welding) arc-assisted MIG welding (Metal Inert-Gas Welding, melting pole inert gas shielded welding) non-contact ignition Arc method and apparatus. Background technique

[0002] Gas metal arc welding usually ignites the arc by contacting the welding wire with the workpiece, which is called contact arc ignition. Contact arc ignition is simple and easy, but it is easy to generate welding spatter during arc ignition, and in severe cases, welding wire will burst, especially when there is a residual ball with a large diameter at the end of the welding wire. When the welding wire breaks, if the end of the welding wire is far away from the workpiece, the arc ignition will fail, requiring two or more arc ignitions, resulting in poor arc ignition reliability. In addition, welding spatter will adhere to the inner...

Examples

Embodiment Construction

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0036] The following describes the TIG arc-assisted MIG welding non-contact arc starting method and device according to the embodiments of the present invention with reference to the accompanying drawings. First, the TIG arc-assisted MIG welding non-contact arc starting method according to the embodiments of the present invention will be described with reference to the accompanying drawings .

[0037] figure 1It is a flowchart of a TIG arc-assisted non-contact arc ignition method for MIG welding according to an embodiment of the...