Automatic welding-torch for ultra narrow gap and consumable electrode under gas coverage, and preparation method

Abstract

An automatic welding torch for the gas shielded welding of ultranarrow gap by use of consumable welding electrode is composed of wire guiding unit, gas guiding unit, water guiding unit, side wall, insulating unit and electric conducting tip. Its making technology includes preparing raw materials, shaping each unit, soldering, treating the soldered seam, assembling, fixing, soldering in fernace, air and water tightness test, trimming, and surficial insulation treating.

Description

technical field [0001] The invention relates to an ultra-narrow gap melting electrode gas shielded automatic welding torch and a manufacturing method thereof, belonging to the field of welding technology. Background technique [0002] Since the invention of narrow gap welding technology in the 1960s, as an advanced welding technology with high quality, high productivity and low production cost, it has been highly valued by industries and welding technology circles all over the world. So far, many narrow-gap welding technologies have been invented, such as: 1. Kazuki Kusano, Hiroshi Watanabe, The latest research trend of high-efficiency TIG welding-fast TIG welding and ultra-narrow groove TIG welding, Fusion Technology, 2002.4; 2. Nakamura Terumi, Hiraoka Kazuo, Weld Formation Characteristics under Narrower Gap Conditions and Ultra-Narrow Gap New Welding Process Plan, Proceedings of Welding Society, Volume 19, No. 1, P44-53, 2001; 3. Japan Welding Society Co-translated by Yi...

AI Technical Summary

Problems solved by technology

Summarizing the existing technologies at home and abroad, there are the following limitations: 1. There is no known thickness less than 5 mm that can meet the requirements of continuous operation under large welding current during ultra-narrow gap metal gas shielded welding, and can be used in full fluid / solid transmission. In the height direction, it is an ultra-narrow gap melting electrode gas-shielded automatic welding torch that integrates conduction / gas conduction / guide wire / circulation water conduction / reliable electrical insulation and is made of integral materials; it is manufactured by a segmented method and has concentricity, The watertight and airtight quality of the section joints is difficult to guarantee, and the yield is low; 2. Installing insulating needle rollers on the surface in the thickness direction of the extremely thin welding torch is difficult in engineering, and the insulators that are too small in size reduce the insulation reliability; 3. Setting the gas guide channel away from the centroid of the section is not conducive to the metallurgical protection of the welding area

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