冷冲模的工作部份(凸模、凹模)最易损坏,且成本占总成本的70%以上,冷冲模的寿命主要指工作部份的寿命。一、冷冲模的失效方式冷冲模正常失效的主要方式是磨损。但也可能由于各件异常原因导致早期失效。冷冲模的磨损主要是摩擦磨损和咬合磨损(粘合磨损),由咬合磨损产生的碎屑或外部进入的磨粒而造成的磨料磨损,因摩擦发热而产生的热磨损,凸模由于反复承受拉、压应力作用而产生疲劳磨损等等。磨损的过程分三个阶段(见图1)。即初 The working part of cold die (punch, die) is the most vulnerable, and the cost of the total cost of more than 70%, the life of the cold die mainly refers to the working part of the life. First, the failure mode of cold die Die normal failure is the main way to wear and tear. However, it may also lead to early failure due to abnormalities in each piece. Cold die wear is mainly frictional wear and occlusal wear (adhesive wear), caused by occlusal wear debris or external abrasive particles caused by wear and tear due to friction and heat generated by thermal wear, punch due to repeated Pull, compressive stress and fatigue wear and so on. The wear process is divided into three stages (see Figure 1). That is early