(大连交通大学 材料科学与工程学院，大连 116028)
摘 要: 在连续挤压技术研究的基础上，通过观测挤压轮槽金属的变形形貌，提出了“五分区”的连续挤压变形过程描述模型，构成了连续挤压轮沟槽变形区系统、完整、准确的表征。根据各分区的变形特点，利用塑性力学理论得出接触应力的解析表达式，讨论连续挤压变形区接触应力的分布特点与规律。通过深入分析，得出了个分区关键参数的设计准则与确定方法，探讨了提高挤压力的措施，最后通过与实验结果的比较验证了其工程应用价值。
关键字: 金属成形；连续挤压；应力分布
continuous extrusion process
（School of Material Science and Engineering, Dalian Jiaotong
University,Dalian 116028, China）
Abstract:Based on the research about state of metal in groove, an new Five Zone describing model for continuous extrusion process was established to describe the process, and its analytic solution of stress calculation for each sub-zone was given. The correctness was testified through experimentation, which verifies that it is an effective analyzing method for continuous extrusion industry application to estimate the load on the extrusion wheel and chamber. In addition, the principle for increasing extrusion pressure and determining way for key parameters on each sub-zone was discussed.
Key words: metals forming; continuous extrusion; stress distribution
