【摘要】 通过对不同温度、冲头速率、压边方式、压边力以及润滑条件下板料的变形状态及冲压力-冲压行程曲线的研究,考察不同成形条件对ZE10镁合金板料成形性能的影响.在成形过程中,采用加热元件与热电偶连接的方式对凹模与冲头进行温度控制;通过对弹簧压下量的控制分别施加固定压边力与渐变压边力.结果表明,当凹模温度为250-300℃、冲头温度为(60±5)℃、冲头速率为(20±5)mm/min时,采用浮动压边方式,压边力从2 kN逐渐增大到10 kN,并以80%气缸油+20%石墨作为润滑剂,ZE10镁合金板料具有较好的成形性能,其极限拉深比可达2.8.更多还原

【Abstract】 Based on the deforming status and punching load-displacement curves of ZE10 magnesium alloy sheet,the forming properties of ZE10 sheet were experimentally investigated.The experiments were carried out in different temperatures,punching velocities,blank-holding methods,blank-holding forces and lubricate oil.In the experiments,the temperatures of the die and the punch were controlled via the thermocouples connected to heating components,and the fixed and gradually changed blank-holding forces were exerted by controlling the compression degree of spring.The results show that,when the lower die and punch are respectively heated to 250~300℃ and(60±5)℃,the punching velocity is(20±5)mm/min,the blank-holding force increases from 2 to 10kN,the mixture of 80% gas pump oil and 20% graphite is used as the lubricant, and the floating blank-holding method is adopted,ZE10 magnesium alloy sheet exhibits preferable forming properties with a limit drawing ratio of 2.8.更多还原