Arc extinguishing control method of plasma-tig double welding torch applied to circular weld welding

Abstract

The invention discloses an arc extinguishing control method for plasma-TIG double welding guns applied to circular weld seam welding, which specifically includes plasma torch ion gas flow, plasma torch working current, TIG welding torch working current, TIG welding torch welding wire feeding after entering the arc extinguishing program The control of the wire speed and the running speed of the plasma-TIG double welding torch is based on the arc closing method provided by the present invention. In the scene where the plasma-TIG double welding torch is applied to the welding of the circular weld, it can comprehensively solve the problem of the circular weld in the arc closing. The existing defects such as incomplete fusion, incomplete penetration and pores can effectively improve the welding quality of the circular weld when the arc is closed, and has a larger coverage than the prior art.

Description

technical field [0001] The invention relates to the field of welding, in particular to an arc-stop control method for plasma-TIG double welding torches applied to circular seam welding. Background technique [0002] The plasma-TIG double welding torch formed by the combination of plasma welding torch and tungsten argon arc welding torch (ie TIG welding torch) is an efficient welding method for annular welds. This welding method is often used for welding workpieces with a thickness of 3-12mm. . In the plasma-TIG double welding torch, the plasma welding torch and the TIG welding torch are distributed at intervals (generally 200-300mm) in the moving direction of the relative annular weld. In the specific welding process, the plasma arc of the plasma welding torch first penetrates the workpiece along the thickness direction to form a stable small hole, and obtains a single-sided welding and double-sided forming weld; then the welding arc of the TIG welding torch performs the we...

AI Technical Summary

Problems solved by technology

[0003] In the welding process of the circular weld, the welding end point of the circular weld is also the starting point of the welding. The welding quality at this position is the weakest link in the entire welding process. In actual production, incomplete fusion, incomplete penetration and pores often occur at this position Defects, so that the products obtained by welding must be repaired or even scrapped, which will indirectly increase the production cost of the product

These defects are often caused by improper arc closing of plasma welding torches and TIG welding torches.

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