塑性理论在极端盖机设计中的应用  

THEORY OF PLASTICITY AND ITS APPLICATION TO THE DESIGN OF A STAKE-FLANGE MACHINE

作　　者：何芝仙[1] 戴华岳 

机构地区：[1]安徽工程科技学院机械工程系,芜湖241000 [2]芜湖中亚汽车配件公司,芜湖241000

出　　处：《力学与实践》2004年第3期32-36,共5页Mechanics in Engineering

摘　　要：桩端盖机设计和生产必须解决塑性极限弯矩、配套电动机功率、工件下料尺寸等计算问题。把桩端盖机的工件加工过程视为一个塑性折弯过程,根据问题的特点,提出基于Tresca屈服准则的一种简化计算方法,解决了工件在塑性折弯过程中的受力分析、应力和变形分析等问题,得到相应的数学表达式。最后结合某厂生产实际给出了一个计算实例, 为桩端盖机设计提供了理论依据。This paper discusses the calculation of plastic limit of bending moment of a workpiece, the determina- tion of motor power matching a stake-flange machine and the choice of geometric shape and dimension of workpiece sections in the process of the machine design. Plastic- ity theory is applied to solve these problems and a new simplified method based on Tresca yielding's law is pre- sented according to the features of the problems in order to solve the problems mentioned above. The plastic stress and strain distribution of the workpiece and the respec- tive mathematical formulas are obtained. A calculating example from a factory is given.

关 键 词：塑性理论 桩端盖机设计 塑性极限弯矩 理想弹塑性材料 塑性弯曲变形 平面应力 

分 类 号：O344.3[理学—固体力学]