Welding gun swinging device for vertical electrogas welder

Abstract

The invention provides a welding gun swinging device for a vertical electrogas welder, which comprises a horizontal sliding mechanism for leading a welding gun to carry out linear motion along the direction of a vertical weld seam and a serrated swinging mechanism for leading the welding gun to swing in a groove clearance of the vertical electrogas welder, wherein the serrated swinging mechanism on which the welding gun is mounted is arranged on the horizontal sliding mechanism. Thus, the invention has the beneficial effects that a welding electric arc can move back and forth and be welded between a forming cushion plate on the back surface of the weld seam and a water-cooled forming slide block on the front surface of the weld seam as well as between a left side plate and a right side plate of a groove of the vertical electrogas welder; the side wall of the weld seam can be effectively ensured to be fully fused with a welding pool; the depth of a weld penetration can be remarkably increased, so that the mechanical property of the weld seam can be remarkably improved; and even if the melting speed of a welding wire is improved and the welding heat input is reduced, the side wall of the weld seam can still be fully fused with the welding pool to avoid interruption or mutation, even crack.

Description

【Technical field】 [0001] The invention belongs to the technical field of welding oscillating devices, in particular to a welding torch oscillating device for vertical gas-electric vertical welding. 【Background technique】 [0002] The vertical gas-electric vertical welding method based on the metal gas shielded welding technology is an efficient welding method very suitable for heavy metal structures, but the biggest problem with these vertical gas-electric vertical welding methods is that the welding heat input is high, and it varies with the thickness of the plate. The increased heat input will reduce the crystallization rate of the weld metal, resulting in coarse grains, resulting in a decrease in the mechanical properties of the weld and seriously affecting the low temperature impact toughness of the weld. The only way to solve this problem is to reduce the heat input of vertical gas-electric vertical welding while increasing the deposition rate, that is to say, a method ...

AI Technical Summary

Problems solved by technology

Therefore, in order to fundamentally solve the welding heat input problem of vertical gas-electric vertical welding, it is necessary to find a new welding method that can greatly increase the welding wire deposition rate per unit current, and the invention patent "high welding wire melting speed and low welding heat input The arc welding method (Patent No. 201010541778.5)” can meet this requirement, but the reduction of welding heat input during the welding process will cause the sidewall of the weld to fail to fuse, the weld will appear intermittent or abrupt, and the strength of the weld will be greatly reduced. , and even cause cracks

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