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冷冲压是机械制造业能够优质、高产、省工、省料的先进无屑加工工艺之一。本文根据实践体会就冷冲压过程中的润滑机理进行初步探讨,不当之处望批评指正。(一)冷冲过程中润滑的作用板料冷冲过程中所受外力超过其屈服极限σ_s、达到其抗剪强度τ之后,即发生变形或分离。由于金属晶体流动、品格滑移、晶界破坏以及强烈摩擦等而产生大量热量。其中,相当一部分热量被模具的工作部分所吸收,单靠模具本身的传导、辐射和对流,不能迅速扩散这些热量。因此,当压力机长时间连续运转之后,模具工作部分的温度会迅速提高,其硬度和
Cold stamping is the machinery manufacturing industry to high-quality, high yield, labor-saving, material-saving advanced chip processing technology. This article based on practical experience on the cold stamping process of lubrication to conduct a preliminary discussion, Wang criticized the improper correction. (A) the role of lubrication in the cold-red process The external force in the process of cold-sheet blank exceeds its yield limit σ_s, reaching its shear strength τ, that is, deformation or separation occurs. Due to metal crystal flow, character slip, grain boundary damage and strong friction and so generate a lot of heat. Among them, a considerable part of the heat is absorbed by the working part of the mold, the mold itself, conduction, radiation and convection, can not quickly spread the heat. Therefore, when the press for a long time continuous operation, the working part of the mold temperature will increase rapidly, and its hardness and