A graphite electrode and a method for processing the inner diameter of a steel pipe using the graphite electrode

Abstract

The invention discloses a graphite electrode and a method for steel pipe inner diameter machining with the graphite electrode. The graphite electrode comprises an insulation shell, a connection cable, an insulation bearing plate and a graphite electrode head. The insulation shell is fixedly connected to the top end of the insulation bearing plate. One end of the connection cable penetrates through the insulation shell and is electrically connected with the graphite electrode head. The graphite electrode head comprises a connection portion and a working portion integrally connected to the bottom end of the connection portion. The connection portion is fixed to the insulation bearing plate. An electrolysis unit is composed of the graphite electrode, a bearing seat, a steel pipe, an electrolysis solution box and a sediment box. The electrolysis unit machines a stainless steel pipe inner diameter and can accurately correct the stainless steel pipe inner diameter, and the defects of wall deviation, protruding and the like caused by extrusion forming are overcome. Long stainless steel pipes with the length being more than 3 meters can be machined, the defects of traditional machining are overcome, working efficiency is high and the graphite electrode and the method for steel pipe inner diameter machining with the graphite electrode are friendly to the environment and free of pollution.

Description

technical field [0001] The invention relates to a graphite electrode and a method for processing the inner diameter of a steel pipe by using the graphite electrode. Background technique [0002] At present, some seamless stainless steel long tubes on the market are produced by extrusion technology, and the inner diameter is uniformly controlled, and often have partial wall or elliptical protrusions, which cannot meet some requirements for the accuracy and uniformity of the inner diameter of stainless steel tubes. Higher industry use (such as the production of rotating targets requires the inner diameter of the stainless steel tube to be 125mm, the tolerance of the inner diameter to be plus or minus 0.5mm, and the difference in wall thickness to be within 0.5mm, but the existing long stainless steel tube often exceeds the tolerance by about 2 to 3 times. ). [0003] Due to the long length of stainless steel pipes, traditional mechanical turning can only process about 0.5 met...

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Problems solved by technology

[0002] At present, some seamless stainless steel long tubes on the market are produced by extrusion technology, and the inner diameter is uniformly controlled, and often have partial wall or elliptical protrusions, which cannot meet some requirements for the accuracy and uniformity of the inner diameter of stainless steel tubes. Higher industry use (such as the production of rotating targets requires the inner diameter of the stainless steel tube to be 125mm, the tolerance of the inner diameter to be plus or minus 0.5mm, and the difference in wall thickness to be within 0.5mm, but the existing long stainless steel tube often exceeds the tolerance by about 2 to 3 times. )

[0003] Due to the long length of stainless steel pipes, traditional mechanical turning can only process about 0.5 meters in length. For long stainless steel pipes with a length of 3 meters, it is impossible to turn the inner diameter of the steel pipe.

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