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Special requirements for shearing process of Three -phase EI lamination silicon steel sheet
Dec 03, 2018

The performance quality of three-phase EI lamination silicon steel sheet directly affects the consumption of electric energy in practical applications, and also affects the performance, volume, weight and various material savings of products such as motors and transformers. After three-phase EI lamination silicon steel sheet is cut and stamped, internal stress will be generated, which will deform the crystal grain, resulting in a decrease in magnetic permeability and an increase in iron loss. Therefore, it is necessary to ensure the elimination of internal stress and ensure the original performance.

Moreover, in the process of shearing of the three-phase lamination silicon steel sheet, insulation damage should be avoided in the shearing range, and the edge of the sheet should be free from crushing, otherwise the quality of the core will be affected. In general, the special requirements for the shearing process are: burrs on the silicon steel sheets used in generators, motors and transformers, which have an effect on their electromagnetic properties, motor output power and generator life, and burrs during lamination The eddy current loss caused by the short-circuit between the sheets is increased, and the lamination filling factor is lowered, so that the product after shearing should be substantially free of burrs.

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