A dual-melting-pole arc welding torch based on heat input control and its welding method

Abstract

The invention belongs to the field of metal welding, and specifically relates to a thermal input control based electric arc welding gun with double consumable electrodes and a welding method thereof. According to the thermal input control based electric arc welding gun with double consumable electrodes, a non-consumable electrode gas protection electric arc torch is fixed on an auxiliary outer sleeve, threaded rods are arranged on the two sides of the auxiliary outer sleeve; consumable electrode gas protection electric arc torches are fixed on an adjusting gear assembly, a threaded rod is arranged at one end of the adjusting gear assembly, the threaded rod on the adjusting gear assembly and the threaded rods on the two sides of the auxiliary outer sleeve are connected together through a connecting sleeve with an internal thread, and the two consumable electrode gas protection electric arc torches are connected on the two sides of the non-consumable electrode gas protection electric arc torch through the connecting sleeve. According to the welding gun and the welding method thereof, thermal input on a workpiece is reduced while high deposition rate can be realized, the welding deformation of the workpiece is reduced, the welding quality is greatly improved, the weld procedure specification range is enlarged, the welding method is a new welding technology with high efficiency and low thermal input, and particularly has obvious advantages in welding plates of moderate thickness.

Description

technical field [0001] The invention belongs to the field of metal welding, and in particular relates to a double melting electrode arc welding gun based on heat input control and a welding method thereof. Background technique [0002] High efficiency is the development direction of current welding technology. To achieve high-efficiency welding, one is to increase the welding speed, but increasing the welding speed is prone to defects such as incomplete penetration, discontinuous weld bead, and undercut; the other is to increase the welding wire deposition rate, but conventional MIG welding (such as MIG / During MAG welding), increasing the welding wire deposition rate also means increasing the welding heat input, which causes problems such as welding deformation and heat-affected zone expansion. [0003] In order to solve the above problems, Professor Zhang Yuming of the University of Kentucky in the United States proposed a heat input control method, that is, to shunt the ...

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Problems solved by technology

[0004] Most of the above research work is focused on the arc physical characteristics of heat input control technology and the design of twin-wire welding torch. So far, there is no welding torch and its welding method based on heat input control that can be truly applied to production practice and give full play to its advantages. where the

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