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摘要：
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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。
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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.
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基金项目：
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国家自然科学基金重点项目(50635020)
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作者简介：
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参考文献：
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[1]宋宝韫,樊志新,刘元文.应用连续挤压技术生产铜扁线[J].电线电缆,2001,(2):17 18.
[2]刘元文,宋宝韫,樊志新,等.铜扁线连续挤压工艺[J].锻压机械,2002,37(5):31 32.
[3]谢玲玲,宋宝韫.铜母线连续挤压扩展成形过程的三维有限元数值模拟[J].锻压技术,2005,30(3):72 75.
[4]周飞,苏丹,彭颖红,等.金属塑性成形有限体积数值模拟[J].模具技术,2002,(3):3 5.
[5]周飞,苏丹,彭颖红,等.有限体积法模拟铝型材挤压成形过程[J].中国有色金属学报,2003,13(1):65 70.
[6]李大永,罗超,周飞,等.薄壁门窗型材挤压的有限体积分步模拟[J].中国有色金属学报,2004,14(8):13601365.
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