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TIG (Tungsten Inert Gas) welding gun using external magnetic field

A technology of external magnetic field and welding torch, which is applied in the direction of welding equipment, arc welding equipment, metal processing equipment, etc., can solve the problems of slow flow of liquid metal, prone to pores, cracks, large supercooling, etc., and achieve compact structure and improved The mechanical properties of the weld and the effect of reducing segregation

Inactive Publication Date: 2013-09-18
SHENYANG AIRCRAFT CORP
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  • Abstract
  • Description
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Problems solved by technology

[0003] At present, in traditional TIG welding, the welding seam can only be formed by adjusting parameters such as welding current and welding speed. Under natural arc welding conditions, the flow of liquid metal in the entire molten pool is relatively stable, and the flow speed of liquid metal Slower, because the temperature of the welding torch adjacent to the base metal is low, it has a large degree of undercooling, the grains are mainly columnar grains, the grains are relatively coarse, and defects such as pores and cracks are prone to occur after welding

Method used

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  • TIG (Tungsten Inert Gas) welding gun using external magnetic field

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Embodiment Construction

[0010] Attached below figure 1 The present invention is further described. In the present invention, the welding torch 1 is locked by the thread of the bolt 5 and the clamping device 2 and the winding shaft 3, and the entire applied magnetic field is realized by an applied current to realize electromagnetic conversion.

[0011] Judging by the left-hand and right-hand rules, the winding method of the coil 4 will generate a longitudinal magnetic field on the arc. Affected by the longitudinal magnetic field, the arc is "bell-shaped", and its bell surface is a closed curved surface rotating at a high speed; The magnetic field makes the arc temperature distribution diverge, the temperature field is "short and fat", the temperature at the center of the arc drops, and the radial temperature gradient is small; in the longitudinal magnetic field, due to the rotation and expansion of the welding arc, the weld width increases and the penetration depth decreases. Small; the liquid metal i...

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Abstract

The invention provides a welding gun which is arranged on a TIG (Tungsten Inert Gas) welder. A welding gun 1 is locked with threads of a reel 3 through a bolt 5 and a clamping device 2; a coil 4 is wound outside the reel 3 and is connected to a power supply; current produces a magnetic field through the coil 4; the current which passes through the coil 4 is intermittent alternating current; the produced magnetic field is an intermittent alternating magnetic field; the intermittent alternating magnetic field has an effect on electric arc so as to improve the welding quality.

Description

technical field [0001] The invention relates to the field of welding, in particular to a TIG welding gun with an external magnetic field. Background technique [0002] TIG welding is a kind of non-melting electrode that uses pure tungsten or activated tungsten (thoriated tungsten, cerium tungsten, zirconium tungsten, lanthanum tungsten) to melt the metal to form a weld by using the arc between the tungsten electrode and the workpiece. It is extremely non-melting and only acts as an electrode. At the same time, the nozzle of the welding torch is fed with argon or helium as a protective welding method; the main advantage of the TIG welding method is that it can weld a wide range of materials, including thicknesses of 0.6mm and more. The above workpieces are made of alloy steel, aluminum, magnesium, copper and its alloys, gray cast iron, ordinary steel, various bronzes, nickel, silver, titanium and lead. The main application field is welding thin and medium thickness workpieces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/08
Inventor 徐在山杨磊
Owner SHENYANG AIRCRAFT CORP
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