Automatic welding technique for splicing plates of cylinder body of oil tank truck

Abstract

The invention discloses an automatic welding technique for splicing plates of a cylinder body of an oil tank truck and belongs to the technical field of oil tank truck machining. The automatic welding technique for the splicing plates of the cylinder body of the oil tank truck comprises the following steps that (I) obverse-side welding is conducted, specifically, cylinder body splicing plate ring bending joints are subjected to obverse-side through welding till double face forming is achieved; and (II) reverse-side welding is conducted, specifically, after the step (1) is completed, the splicing plates of the cylinder body are turned, and non-wire filling self-fusible welding is conducted on the excess weld metal of the back sides of weld joints. According to the automatic welding technique for the splicing plates of the cylinder body of the oil tank truck, the work procedure that non-wire filling self-fusible welding is conducted on the excess weld metal of the back sides of the weld joints is added, the back-side weld joints are re-melted, air holes in the excess weld metal of the back sides of the weld joints are melted again to enable air in the air holes to overflow, thus after welding, chain-shaped air hole welding defects at weld toes of the back sides of the weld joints and in the excess weld metal of the back sides of the weld joints are completely eliminated, and the weld joint quality of automatic welding of the splicing plates of the cylinder body of a tank body is ensured.

Description

technical field [0001] The invention belongs to the technical field of oil tank truck processing, and particularly relates to an automatic welding process for assembling a tank body of an oil tank truck. Background technique [0002] In the production of tank trucks, the welding operation of the tank body is a key process in the production process of the tank truck. In the design drawings, it is required to pass the radiographic inspection of the welding seam of the tank body assembly (the implementation standard of radiographic inspection is NB / T 47013.2, and the rating standard is Class III), in which the qualified quality of the automatic welding seam of the cylinder body assembly is the premise to ensure the qualified radiographic inspection of the welding seam of the cylinder body assembly. [0003] In the automatic welding of the tank body body, the existing technology uses the PBJ-12500 flat-plate butt automatic welding machine for welding. This equipment is equipped ...

AI Technical Summary

Problems solved by technology

[0004] Since the back of the weld is formed by the back forming groove, the welding heat input is large. At the same time, it is difficult to clean the sundries and oil stains in the back forming groove, and the back gas protection is poor, so that the water vapor in the groove of the backing plate enters the weld reinforcement on the back Inside, the generated hydrogen cannot overflow in time, and stays in the back reinforcement of the weld and the weld toe, causing chain-like pores to appear at the weld toe of the back of the weld and in the back reinforcement of the weld, which in turn causes the tank body to fail to meet the design Require

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