【摘要】 采用FVM数值模拟方法研究了铜连续挤压过程中坯料的温度场。研究结果表明,坯料与挤压轮之间的摩擦对于坯料温度的上升影响较小,坯料在连续挤压过程中温度的上升主要源自坯料的塑性变形。通过理论分析,导出了铜连续挤压产品在模具出口处的温度计算公式。结果表明,一般情况下,铜挤压产品在模具出口处的温度为490~530℃,主机电枢电流上升10%,产品温度将上升50℃,对应腔体鼻子的温度将上升13~20℃;通过提高挤压轮的转速不能有效提高产品温度,达不到软化产品的效果。更多还原

【Abstract】 The temperature is one of the important factors which affects continuous extrusion process.The temperature field of the billet in copper continuous extrusion process was simulated by finite volume method.The numerical results show that the temperature is affected mainly by metal plastic deforming,and temperature is affected less by friction between extrusion wheel groove and copper rod.Based on energy principle,the calculation formula of product temperature in continuous extrusion process was given.The theory results show that(1)the product temperature is about 490～530 ℃ in usual copper continuous extrusion process;(2)when the current of motor armature is raised by 10%,the temperature of the product will go up 50 ℃,and meanwhile the chamber temperature will be increased by 13～20 ℃;(3)when wheel rotate speed mounts up,the product temperature can not be risen and therefore product will not become soft.更多还原