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How to improve the quality of silicon steel three-phase EI Lamination with holes
Mar 10, 2018

At present, in the production of silicon steel three-phase EI Lamination with holes products, although the production technology has been relatively mature, there are still many hidden factors affecting the quality of silicon steel three-phase porous EI products. So how to improve the quality of three-phase free EIP?

 

One of the first issues that should be considered is the rational selection of silicon steel grades. If the grade is not selected, it will directly affect the quality of silicon steel three-phase EI Lamination with holes. Therefore, for producers, how to select the grade and volume number according to the core no-load indicators Io, Po is a problem that must be solved first. Silicon steel grades are generally defined by the material's weight per kilogram of iron, W1.5/50 (unoriented steel) or W1.7/50 (oriented steel).

 

It should be noted that a reasonable choice of materials can not only improve the quality of silicon steel three-phase EI Lamination with holes, but also avoid waste. Second, we must pay attention to the strict management of silicon steel edge materials. Some factories purchase uncut silicon steel coils. Compared with the intermediate material, the edge materials on both sides have three characteristics: First, the electromagnetic properties of the edge material are 5 to 10% worse than the intermediate material; the second is the material thickness ratio of the intermediate material. Slightly thin; third is slightly thicker inside, slightly thinner outside, trapezoidal cross section.

 Three -phase EI lamination.jpg

If the edge material is mixed with the intermediate material, it will naturally cause a series of quality problems. Therefore, the quality of the materials should be strictly controlled during the production process. In addition, the sub-materials on the upper and lower tool positions should be separately labeled and separately punched so as not to affect the quality of silicon steel three-phase porous EI sheets.

 

In comparison, the upper tool, the material received by the stress is small, electromagnetic quality is excellent, so the silicon steel out of the three-phase hole EI plate shape is good, excellent electromagnetic quality; under the knife, open material stress, The electromagnetic quality is poor, then the three-phase EI Lamination with holes that is punched out of silicon steel has poor plate shape and poor electromagnetic quality.

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