Condensation electric arc welding gun

Abstract

The invention discloses a condensation electric arc welding gun, which belongs to the technical field of welding equipment. A tungsten electrode is closely embedded in the center of an electrode holder; the electrode holder is sleeved in the center of a main connector through thread; the root part of the electrode holder is mutually engaged with the main connector by using an inclined surface, so that water cooling effect to the electrode and no leakage are guaranteed; a ceramic nozzle is sleeved on the periphery of the main connector through threaded connection; a protective gas laminar flow screen is a stainless steel wire net which is fixed on the other end face of the main connector through an O-shaped steel wire spring, so that protective gas forms laminar flow; a water outlet pipe, a water inlet bushing or a gas inlet bushing is provided with a cable connecting end; the water inlet bushing is coaxially sleeved outside a water outlet straight pipe; and the gas inlet bushing is sleeved outside the water inlet bushing, a water inlet passage is remained in the middle of the gas inlet bushing and the water inlet bushing, and the gas inlet bushing and the water inlet bushing are welded on the same end face of the main connector to form a water cooling passage and a gas protection passage. Apart from the ceramic nozzle, all the remaining materials are conductors. According to the condensation electric arc welding gun, the free electric arc energy intensity can be improved, and better capacity of controlling welding joint formation is achieved.

Description

technical field [0001] The invention relates to a welding torch, which is an arc welding torch capable of shrinking the arc and increasing the energy density, and belongs to the technical field of welding equipment. Background technique [0002] Arc is a form of gas discharge, and the use of arc as a welding heat source has a long history in industrial applications. Since the appearance of the free arc (1885, Benardos Olszewski's carbon electrode arc in Russia), the optimization of the structure and characteristics of the arc has always been a focus of attention of academic and engineering professionals at home and abroad. In the 1940s, the NorthropGrumman Company of the United States invented the tungsten inert gas shielded welding torch and technology, which improved the energy density and controllability of the arc, and showed excellent effects on the quality of metal material welding. For more than half a century thereafter, the form of this welding torch has not change...

AI Technical Summary

Problems solved by technology

For more than half a century thereafter, the form of this welding torch has not changed. Its outstanding shortcoming in production and use is that the arc of the welding torch is in a free burning state, and the energy density is difficult to further increase, resulting in welding production efficiency. Difficult to improve

At the same time, the heat input and heat-affected zone of the welded joint are too large, resulting in large post-weld deformation and residual stress

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