Anti-deformation processing method and special tool for magnetic isolation groove of pull plate of transformer clamp

Abstract

The invention relates to method and special tools for anti-deformation machining of flux barriers of a clamp pulling plate of a transformer and belongs to the technical field of transformers. According to the technical scheme, the multiple special tools (22) for anti-deformation machining and the clamp pulling plate (21) are fixed together in a spot welding mode, the clamp pulling plate is placed on a working table of a plasma cutting machine and is adjusted to be located at a position suitable for machining, then the height of the water surface of the plasma cutting machine is adjusted to guarantee reliable cooling of the clamp pulling plate during cutting, then the flux barriers are cut-formed in the clamp pulling plate underwater by means of the plasma cutting machine, the deformation of the clamp pulling plate is controlled by means of the special tool for anti-deformation machining during plasma cutting, and then the machining of the flux barriers of the clamp pulling plate of the transformer is achieved. The method and special tools for anti-deformation machining of the flux barriers of the clamp pulling plate of the transformer aim at the pulling plate, of a multi-groove structure, of the transformer, the flux barriers are formed in a plasma underwater cutting mode, the special tools for anti-deformation machining are manufactured according to the distance between the flux barriers, and therefore the deformation of the multi-groove clamp pulling plate is effectively controlled during machining, the occurrence of unqualified products is reduced, and the machining efficiency of the clamp pulling plate is improved.

Description

technical field [0001] The invention relates to an anti-deformation processing method and a special tool for a magnetic isolation groove of a pull plate of a transformer clip, and belongs to the technical field of transformers. Background technique [0002] With the increase of the voltage level of the power transformer, the structure of the drawing plate used to connect the upper and lower clamps is becoming more and more complex. In order to reduce the eddy current at the drawing plate and reduce the heat generation, the drawing plate material is upgraded from ordinary low carbon steel to 20Mn23Al Low magnetic material, the number of magnetic isolation slots is increased from one slot to five slots. In order to improve the processing efficiency, the magnetic isolation groove of the draw plate in the background technology is processed by flame or plasma cutting, and the cutting performance of the steel plate made of low magnetic material is poor by flame or plasma cutting, ...

AI Technical Summary

Problems solved by technology

In order to improve the processing efficiency, the magnetic isolation groove of the draw plate in the background technology is processed by flame or plasma cutting, and the cutting performance of the steel plate made of low magnetic material is poor by flame or plasma cutting, and it is easy to deform and cannot be cut during the cutting process. control, it often leads to the width of the magnetic isolation groove being out of tolerance, and the deformation is serious, resulting in repair

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