Semi-automatic backing welding method for consumable electrode of stainless steel gasket of aluminum alloy plate

Abstract

A semi-automatic backing welding method for a consumable electrode of a stainless steel gasket of an aluminum alloy plate comprises the following steps: obliquely arranging the aluminum alloy plate and the stainless steel gasket clung to the lower part of the aluminum alloy plate onto a plane at an angle of 10-30 degrees with the horizontal ground; in a welding process, enabling a welding gun to be vertical to the surface of the aluminum alloy plate, downwards and backwards leaning at an angle of 10-20 degrees, swinging a welding gun nozzle in a Z shape leftwards and rightwards on the two sides of a base material, welding from bottom up, reasonably controlling a welding stop point to act on the root parts of the base material on the two sides, and fully melting. When the method is applied to a process of welding and manufacturing a large and thick plate container, the characteristics of a semi-automatic welding process can be fully utilized and the heat input in the welding process does not need to be compensated by external heating, so that the energy consumption is reduced, the production cycle is shortened and the production cost is greatly lowered.

Description

Technical field [0001] The invention relates to a semi-automatic bottom welding method for stainless steel gaskets of aluminum alloy plates, belonging to the technical field of metal welding. Background technique [0002] 1. The characteristics of melting pole semi-automatic welding process. [0003] Molten electrode gas shielded welding technology (MIG) is widely used in the manufacture of aluminum alloy pressure vessels. It is a low-hydrogen welding method, and the hydrogen content of the weld metal is relatively low. Therefore, it is suitable for metal welding sensitive to cracks. Secondly, this welding method has deep penetration and strong penetrating power. For some joints, grooves can be omitted or less grooved. Compared with other methods, it has the following advantages: [0004] 1. Melting pole welding adopts spray transition, low welding heat input, high welding speed and small welding deformation, which reduces the workload of post-welding correction; [0005] 2. Good b...

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a stainless steel liner that can avoid breakdown or damage, effectively solve the problems of unstable internal quality of backing welding, improve the pass rate of one-time molding, and improve production efficiency. Reduce energy consumption, shorten the production cycle, and greatly reduce the production cost of the stainless steel liner semi-automatic welding method for aluminum alloy plates

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