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由球墨铸铁制造的拉伸模,设计要求HRC53～57。改进前模具硬度仅达HRC32～48。拉伸封头数量最高为8000～10000件,一般小于8000件。模具失效形式表现为磨损和划痕。 (1)影响模具寿命的因素:如图1。其中热处理及铸造质量是主要因素。
Drawing die made of ductile iron, design requirements HRC53 ~ 57. Improve the mold hardness before HRC32 ~ 48 only. Stretching the highest number of head 8000 to 10000, generally less than 8000. Mold failure forms manifested as wear and scratches. (1) Factors affecting the life of the mold: Figure 1. Heat treatment and casting quality is the main factor.