Welding method for manually welding small groove of T-shaped welding seam and matched welding gun nozzle

Abstract

The invention relates to the field of steel welding, and particularly discloses a welding method for manually welding a small groove of a T-shaped welding seam and a matched welding gun nozzle. The welding method comprises the following steps: 1, manufacturing a groove of steel plates to be welded, and forming the groove on the lower portion of any one welding end part of the two steel plates to be welded; 2, enabling the groove forming angle of one steel plate welding end to be 20 degrees, and the distance between the bottom end of the groove and the bottom of the other steel plate welding end to be 6-8 mm; and 3, welding the end of the groove of the steel plates prepared in the first step and the second step through carbon dioxide welding equipment by adopting the matched welding gun nozzle. Mechanical equipment for finish machining of the groove and corresponding welding equipment are not needed, so that the welding cost is reduced, the sectional area of a welding seam is reduced, the welding efficiency is improved, the labor intensity of workers is reduced, the stress strain of a welding joint is reduced, and the comprehensive performance of the welding seam is improved.

Description

technical field [0001] The invention relates to a welding method, in particular to a welding method for manually welding a small groove of a T-shaped weld seam and a matching welding torch nozzle, which belongs to the field of steel welding. Background technique [0002] Due to the large amount and difficulty of welding steel structure thick plates, the design of groove size is an important factor to improve welding efficiency in the technical field. If high-quality, high-efficiency, and high-reliability narrow-gap welding can be achieved in building steel structures, it will be very attractive, especially in thick plate welding projects. However, in the field of building steel structures, it is difficult to apply factory welding and promote narrow gap welding technology. [0003] High-precision groove processing is the main obstacle to the promotion of narrow gap welding technology in construction steel structure welding engineering. From the perspective of welding, the us...

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Problems solved by technology

However, in the field of building steel structures, it is difficult to apply factory welding and promote narrow gap welding technology.

[0003] High-precision groove processing is the main obstacle for the promotion of narrow gap welding technology in construction steel structure welding engineering. From the perspective of welding, the use of groove welding technology can greatly reduce welding costs, but it greatly increases the cost of groove machinery. Processing cost; due to the large amount of welding in building steel structures and the long weld seams, it is very difficult and costly to process with machinery, and the processing cost is far greater than the welding cost

[0004] Due to the particularity of the construction steel structure field and the strict requirements on engineering costs, it is unrealistic to apply machining grooves in large areas, and it is not cost-effective to purchase expensive special equipment to carry out narrow gap welding technology.

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