Argon arc welding tool for 90-degree arc bend

Abstract

The invention relates to an argon arc welding tool for a 90-degree arc bend. The argon arc welding tool comprises a base plate, a base, a supporting part and a top cover. The welding tool is providedfor welding the edge of the 90-degree arc bend. During welding, argon is led in from an inlet of a gas channel of the supporting part and then is divided into three ways to surround a to-be-welded position, in other words, the first strand of argon is sprayed from a first concave area of the edge of the upper surface of the top cover to protect the upper edge of a weld joint on the top of the 90-degree arc bend, the second strand of argon is sprayed from a second concave area of the edge of the lower surface of the top cover to protect the lower edge of the weld joint on the top of the 90-degree arc bend, and the third strand of argon is sprayed from an air outlet hole of a supporting face to protect the whole inner wall of the 90-degree arc bend on a to-be-welded part. Thus, the effect range of the shied gas is enlarged, the heat dissipation efficiency is improved, and the welding effect is improved.

Description

technical field [0001] The invention relates to a 90° arc bending argon arc welding tool. Background technique [0002] Argon arc welding is a welding technology that uses argon as a shielding gas. Argon arc welding, also known as argon shielded welding, refers to passing argon shielding gas around the arc welding to isolate the air from the welding area to prevent Oxidation of the weld zone. Specifically, argon arc welding technology is based on the principle of ordinary arc welding, using argon to protect the metal welding material, and through high current to melt the welding material into a liquid state on the base material to be welded to form a molten pool, so that the welded material A welding technique in which metal and welding consumables are metallurgically combined. Since argon is continuously supplied during high-temperature fusion welding, the welding consumables cannot be in contact with oxygen in the air, thus preventing the oxidation of the welding consumab...

AI Technical Summary

Problems solved by technology

However, in the prior art, there are very few products that use argon arc welding technology to weld 90° arc bending. bending welds, such as figure 1 As shown, the inner edge of the water inlet of the water tank to be welded 100 extends inward to form a square inner recess 101, and the corners of the inner recess 101 are arc-shaped transition connections. The present invention refers to the transition connection structure as a 90° arc shape bend 102, the top weld 103 and the bottom weld 104 of the 90° arc bend 102 need to be welded during production, and if the back gas protection device of the existing argon arc welding welding tool is used, it is through the shielding gas Directly blow the welding place from the outside, so that the material receives a lot of heat during argon arc welding, and the heat dissipation efficiency is insufficient only by direct blowing of the protective gas, and the material is easy to soften and deform, which affects the welding effect

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