In large-scale modern production practice, mold is an indispensable important process equipment. The use of mold can not only improve labor intensity, improve labor productivity, but also produce parts with higher precision. The mold is made of special steel, especially for parts with complex shapes, the processing of the mold is difficult, the production cycle is long, and the price is very expensive. In general, the cost of the mold can account for more than 15% of the cost of the product, so increasing the service life of the mold has become an important topic at home and abroad. There are many factors affecting the life of the mold, including: design defects of the mold itself, material of the mold, gap between the upper and lower molds, heat treatment process, normal wear and tear during use, use and maintenance, and so on. Take effective measures according to different situations,
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