Plasma arc and MIG arc distance adjustable intelligent composite welding torch

Abstract

The invention belongs to the technical field of welding equipment, relates to a welding torch compounding plasma arcs with MIG arcs, and discloses a plasma arc and MIG arc distance adjustable intelligent composite welding torch. The composite welding torch comprises a plasma generator, a pulse MIG welding gun, a welding gun support, a welding gun bearer, a protective gas hood, a tooth bar, a tooth bar supporting frame, a connection board, a stepping motor, a control system and a current signal gatherer, wherein the welding gun support is provided with a clamp, the plasma generator is fixed on the welding gun support through the clamp, the tooth bar supporting frame is fixed on the welding gun support, the pulse MIG welding gun is connected with the tooth bar through the connecting board, the stepping motor is provided with a gear driving the tooth bar, the plasma generator and the lower end of the MIG welding gun pass through the welding gun bearer, the welding gun bearer and the welding gun support are fixed through a support rib plate, the protective gas hood is connected with the lower portion of the welding gun bearer, and the protective gas hood is provided with a protective gas interface, the current signal gatherer is connected with the control system, and the control system is connected with the stepping motor. The composite welding torch provided by the invention can realize stable, high-efficiency and high-quality composite welding.

Description

technical field [0001] The invention belongs to the technical field of welding equipment, and in particular relates to a welding torch combining a plasma arc and a MIG arc. Background technique [0002] Plasma arc is a high-energy beam developed in modern times. It is an arc with high temperature, high degree of ionization and high energy density formed by compressing a free arc by a plasma generator. Plasma arc welding has the characteristics of high energy density and heat concentration, so the penetration depth is large, the heat affected zone of the weld is small, and high-quality weld formation and structure are easy to obtain. In 1972, W. G. Essers and A.C. Liefkens of the Philips Research and Experimental Center in the Netherlands first proposed the plasma-MIG composite heat source welding method. The main idea is to combine plasma welding with MIG welding, let the welding wire enter the plasma arc, and ignite the MIG arc in the plasma arc. This composite be...

AI Technical Summary

Problems solved by technology

However, since the two arcs are in parallel positions, there will be mutual interference. Generally, the MIG arc will drag the plasma arc and reduce the penetration depth.

The team led by Dr. IGOR of the former Barton Welding Institute proposed the "softstart" arc ignition patent, but it only eliminated the electromagnetic interference generated during the arc ignition process and increased the life of the plasma electrode. It did not play a role in arc interference. effect

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