Butt joint circular seam reverse side gas shielding device for barrel fusion welding

Abstract

Disclosed is a butt joint circular seam reverse side gas shielding device for barrel fusion welding. The butt joint circular seam reverse side gas shielding device for barrel fusion welding is characterized by comprising a welding jig and a gas shielding channel. The welding jig comprises a supporting ring (1), eight adjusting screw rods (2) and eight arc-shaped gas shielding grooves (3), wherein the radian of each arc-shaped gas shielding groove is equal to the inner diameter of a barrel. Air inflation holes (7) are formed in the sides of the gas shielding grooves (3), perforated plates (4) which assist in uniform diffusion of gas are added to the interior of the gas shielding grooves, and sealing grooves (8) are formed in the arc-shaped surfaces, making contact with the inner wall of the barrel, of the two sides of each gas shielding groove (3). The butt joint circular seam reverse side gas shielding device for barrel fusion welding has the advantages that the whole device is flexible in structure, adjustable, and easy and convenient to operate, and adapts to barrel circular seams with different diameters, the effect of gas shielding of a welding seam molten pool and a near weld zone is good, oval deformation of barrel welding can be reduced, the shielding gas is saved, and the time needed by gas replacement in the process of gas ventilation in advance is shortened.

Description

technical field [0001] The invention belongs to the technical field of welding processing of metal materials, and is suitable for the arc fusion welding process of butt joints of cylinder bodies made of materials such as titanium alloy and stainless steel. Background technique [0002] In the prior art, in order to prevent materials such as titanium alloys from being affected by harmful components in the air when welding materials such as titanium alloys, the high-temperature molten pool and the near-seam areas on both sides of the weld seam will cause the performance of the joint to decrease. Vacuum electron beam welding is often used. This method welds The quality is good, but the price of the equipment is high, and it is not suitable for single-piece or small-batch production; there is also a section of the cabin that is sealed by closing the two ends of the entire cylinder, or using a partition, and then replacing it by continuously filling and discharging the protective ...

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Problems solved by technology

[0002] In the prior art, in order to prevent materials such as titanium alloys from being affected by harmful components in the air when welding materials such as titanium alloys, the high-temperature molten pool and the near-seam areas on both sides of the weld seam will cause the performance of the joint to decrease. Vacuum electron beam welding is often used. This method welds The quality is good, but the price of the equipment is high, and it is not suitable for single-piece or small-batch production; there is also a section of the cabin that is closed by closing the two ends of the entire cylinder, or using a partition, and then replacing it by continuously filling and discharging the protective gas. The method of welding after the air in the cylinder is released, but it will cause a large consumption of shielding gas and prolong the time required for welding preparation gas replacement. also relatively difficult

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