Welding clamp and welding method for SF6 circuit breaker shell

Abstract

The invention discloses a welding clamp and a welding method for an SF6 circuit breaker shell. A plurality of pressing devices are arranged above the clamp, sliding plates are arranged on the left side and the right side of the clamp, the sliding plates can slide along guide shafts, a position clamp is further arranged on a clamp bottom plate, and the position clamp can define the positions of reinforcing ribs. The welding method comprises the following steps that S1, the SF6 circuit breaker shell needing to be welded is placed into the clamp; S2, the reinforcing ribs are placed on the position clamp in the clamp, and the reinforcing ribs are limited through reinforcing rib limiting grooves in the position clamp; S3, the welding personnel shake screw rod hand wheels and slide the sliding plate on the left and the sliding plate on the right until the shell is fully attached to the reinforcing ribs and is ensured to be attached to limiting sleeves; S4, pressing rod hand wheels on the upper part of the clamp are shaken, so that the shell is pressed to be completely attached to the internal reinforcing ribs, and meanwhile, the shell welding seam is ensured to be completely attached; and S5, the welding personnel weld the shell according to the shell drawing welding requirement. According to the welding clamp and the welding method, in the case of the whole machine product assembledthrough the shell which is welded through the clamp, the mechanical property parameters of all aspects are guaranteed.

Description

technical field [0001] The invention relates to the technical field of power supply equipment, in particular to a welding jig for an SF6 circuit breaker housing and a welding method thereof. Background technique [0002] Since the second half of 2018, due to the vigorous promotion of the 12kV / 630A sulfur hexafluoride circuit breaker by the State Grid, the relevant R&D technicians of our company have developed and designed this product after nearly half a year. To achieve insulation, the accuracy of the outer dimensions of the shell of this product is relatively high. Due to the relatively lack of knowledge about the product in the early stage, the welding fixture of the product shell was not used, which resulted in the products produced by welding not meeting the mechanical properties of the product (the shell was deformed after welding, the concentricity of the mounting holes was deformed, the shell The parallelism does not meet the requirements, there is air leakage in th...

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Problems solved by technology

Due to the relatively lack of knowledge about the product in the early stage, the welding fixture of the product shell was not used, which resulted in the products produced by welding not meeting the mechanical properties of the product (the shell was deformed after welding, the concentricity of the mounting holes was deformed, the shell The parallelism does not meet the requirements, there is air leakage in the shell, the internal reinforcement ribs and parts of the shell are not positioned correctly), and the production quantity required by the company cannot be reached at the same time, the cost of all aspects is too high, and the product profit is very low

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