Controllable shunt double-tungsten electrode coupling electric arc welding gun device based on center filler wire and welding method thereof

Abstract

The invention provides a controllable shunt double-tungsten electrode coupling electric arc welding gun device based on a center filler wire and a welding method thereof. Two tungsten electrodes are symmetrically arranged in a welding gun body in a small included angle mode, so that a bypass shunt coupling electric arc is formed through an IGBT control module, the filler wire is fed directly from the center of the coupling electric arc, the melting efficiency of the welding wire can be improved through the hottest part of the electric arc, and heat input of the welding wire and a base material can be accurately controlled through the bypass shunt. By means of the controllable shunt double-tungsten electrode coupling electric arc welding gun device based on the center filler wire and the welding method thereof, a filling material can be heated efficiently and stably, the melting quantity of the welding wire and the base material can be effectively and accurately controlled as well, and thus accurate welding heat input control can be achieved while high efficiency welding is guaranteed; the controllable shunt double-tungsten electrode coupling electric arc welding gun device based on the center filler wire and the welding method thereof not only are suitable for high efficiency and high quality welding of materials of the same type but also are suitable for reliably connecting dissimilar materials such as nickel base alloy, stainless steel and copper which have a strict requirement for dilution rate control.

Description

technical field [0001] The invention relates to a welding device and a welding method based on the device. Background technique [0002] In the traditional TIG filler wire welding process, the filler wire is fed into the molten pool from the front end of the welding torch, and the welding wire is almost 90° to the tungsten electrode. The center of the arc, so traditional TIG wire-filled welding fails to effectively utilize the heat of the arc, resulting in low melting efficiency of the welding wire. In addition, due to the limitations of the wire feeding angle and wire feeding position of traditional TIG wire filling welding, not only the bulk of the end of the welding gun is large, but the positioning reliability is poor, and the wire feeding device determines that the welding gun can only weld in one direction. When the welding direction is changed, the welding gun needs to be controlled by the sixth axis of the robot, and an additional turntable is required for complex s...

AI Technical Summary

Problems solved by technology

However, like the traditional TIG filler wire welding, in the TOPTIG welding process, in order to obtain higher welding wire melting efficiency, a larger welding current is required, which will inevitably lead to an increase in welding heat input, which will cause welding deformation and thermal influence of the workpiece. Area expansion etc.

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