Automatic welding preparation method of grounding block surface pure copper composite layer

Abstract

The invention discloses an automatic welding preparation method for a grounding block surface pure copper composite layer, belongs to the field of steam turbine generator product manufacturing, and aims to solve the problems that a grounding block pure copper layer is low in welding efficiency, poor in welding quality and high in repair rate after being machined. According to the method provided by the technical schemes, traditional manual welding is changed into automatic welding, and one-key start welding is achieved through the programming technology; and in the welding process, two workpieces can be welded at a time through a reversible deformation method, so that welding deformation is effectively controlled, meanwhile, the optimal welding parameters and preheating temperature are adopted, the production efficiency is remarkably improved, the welding quality is improved, the repair rate after welding is reduced, and the production cost is saved.

Description

Technical field: [0001] The invention relates to the field of turbogenerator product manufacturing, in particular to an automatic welding preparation method for a pure copper composite layer on the surface of a grounding block of a turbogenerator base. Background technique: [0002] The grounding block is an important part of the stator frame of the turbogenerator. It is installed on the outer surface of the frame and connected to the earth through a cable. The ground block is made of carbon steel. In order to improve its electrical conductivity, a pure copper composite layer with a thickness of 4mm to 6mm is usually prepared on its surface. [0003] The traditional production process of the pure copper layer on the surface of the grounding block adopts the method of manual gas shielded welding surfacing. High temperature, generally above 400°C, this temperature greatly affects the welding conditions of the operator, and once the preheating temperature is not enough, it wil...

AI Technical Summary

Problems solved by technology

[0003] The traditional production process of the pure copper layer on the surface of the grounding block adopts the method of manual gas shielded welding surfacing. High temperature, generally above 400°C, this temperature greatly affects the welding conditions of the operator, and once the preheating temperature is not enough, it will cause poor fusion or defects such as pores, inclusions, etc.; ② Copper welding produces a large amount of toxic fumes, which is extremely It greatly affects the health of the operator and does not meet the requirements of safe and healthy production; ③Manual gas shielded welding is adopted, the welding heat input is small, and the production efficiency is low

Moreover, due to the low melting point of copper, the edge is easy to flow during the welding process, resulting in insufficient processing of the edge of the workpiece.

④The deformation is large, manual welding is to ensure the processing capacity, the thickness of the copper composite layer is increased, resulting in the waste of welding materials and the increase of the processing cycle

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