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

An automatic welding and grounding block technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of waste of welding material processing cycle, low production efficiency, large deformation, etc., to eliminate post-weld repairs and save welding. material effect

CN113977195APending Publication Date: 2022-01-28HARBIN ELECTRIC MASCH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-01-28

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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.
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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...

Examples

specific Embodiment approach

[0037] The invention provides an automatic welding preparation method for a pure copper layer on the surface of a carbon steel grounding block. According to the technical solution proposed by the present invention, the automatic welding of a pure copper composite layer of a steam turbine generator frame grounding block in a certain project is taken as an example, specifically The implementation mode includes the following steps:

[0038] Step 1: The carbon steel grounding block blank upper 1 and the grounding block blank 2 are blanked. The blanking size is length × width: 400mm × 200mm. It is required to reserve 10mm machining allowance around the surface 4 to be welded and the size The tolerance is not greater than 0.5mm;

[0039] Step 2: Fix the two blanks of the plot to be welded together by back-to-back lap welding. The fixing method and lap welding position are as follows: figure 1 shown;

[0040] Step 3: Clean up the oil, impurities and oxides on the surfaces of the tw...