中文摘要：

通过研究薄壁铜管旋锻缩径工艺的成形机理,建立了相应的运动学模型,推导了锻打频率以及最大进给速度和进给力的计算公式。利用有限元分析软件MSC.MARC建立了薄壁铜管旋锻缩径的有限元模型,对其成形过程进行模拟计算,获得不同工艺参数下的成形特征,并分析锻打频率对薄壁铜管旋锻缩径成形的影响规律。同时对旋锻缩径过程进行了实验研究分析,讨论了锻打频率对铜管成形质量的影响。有限元模拟和实验结果均表明提高锻打频率有利于提高进给速度和进给力,改善成形缺陷。而锻打频率的误差通过测量主轴转速计算得到,验证了计算公式的正确性。

英文摘要：

The forming mechanism of the rotary swaging process of thin-walled copper tubes is investigate＆ The corresponding kinematic model is established and the calculating formulas of the forging fiequency and the maximum feeding speed are derived. Finite element software MSC.MARC is utilized to establish the model of the thin-walled copper tube under the rotary swaging process and simulate the forming process. The forming characteristics under different process parameters are obtained and the influence of the forging frequency is analyzed. The rotary swaging process is also analyzed by experimental research and the influence of the forging fiequeney is discussed. Both the simulation and experimental results indicate that increased forging frequeney enables to increase the feeding speed and the feeding load, which could reduce the forming defects. The error of the forging frequency is derived by measuring the rotating speed of the spindle, which verifies the theoretical calculating formula.