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摘要：
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分析了在连续挤压初始喂料阶段,坯料在圆轮槽中的稳定性。通过理论计算和模拟研究得出,圆轮槽中的凸台对于铜的连续挤压建立一个稳定的挤压过程起关键作用。并在此基础上提出了针对圆杆形坯料的几种新的轮槽形状,将这几种轮槽对铜母线连续挤压扩展成形的影响进行了有限元数值模拟。就轮槽形状对铜扩展成形中金属的成形性、挤压轮的扭距以及成形金属流动的均匀性的影响进行了分析讨论。最后得出,带凸台的扩口形轮槽是连续挤压扩展成形中最优的轮槽形状。
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The stability of the feed in wheel groove at the beginning of the feeding stage was analyzed.The convexity in the round wheel groove was critical for founding a steady copper continuous extrusion through the theoretical calculation and simulation analysis.Some new shapes of wheel grooves based on the round rod were brought forward.FEM simulations were done on those wheel grooves for copper extending continuous extrusion.Then the influence of wheel groove on the metal formability,the torque of the extrusion wheel and the uniformity of the metal flow were analyzed in copper extending extrusion.At last,the conclusion is drawn that the flared wheel groove with convexity is the optimum wheel groove for the extending extrusion.
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基金项目：
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国家自然基金资助项目(50635020)
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作者简介：
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参考文献：
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[1]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,(5):189-190.
[2]宋宝韫,樊志新,陈吉光,等.铜、铝连续挤压技术特点及工业应用[J].稀有金属,2004,28(1):257-261.
[3]张新宇.连续挤压包覆机传动功率计算[J].塑性工程学报,1998,5(3):40-44.
[4]李仲阳.连续挤压机挤压轮轮槽的应力集中[J].中南矿冶学院学报,1994,25(4):506-510.
[5]樊志新,宋宝韫,刘元文,等.连续挤压变形力学模型与接触应力分布规律研究[J].中国有色金属学报,2007,17(2):283-287.
[6]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.
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