圆柱体在平板和漏盘间镦粗时的力学分析  

Mechanics Analysis of Cylinder Upsetting between Flat Platen and Supporting Ring

作　　者：刘国晖[1] 肖文辉[1] 倪利勇[1] 刘助柏[1] 

机构地区：[1]燕山大学,秦皇岛066004

出　　处：《中国机械工程》2007年第7期855-858,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助重点项目(59235101)

摘　　要：对水压机锻造平板、漏盘间镦粗圆柱体进行了力学分析。针对毛坯高径比大于1时的情况,提出了刚塑性拉应力力学模型;针对毛坯高径比小于1时的情况,提出了静水应力区切向应力力学模型。前者打破了镦粗体不论高径比如何总存在三向压应力之说;后者圆满地解释了锻造的齿轮轴法兰部分存在层状裂纹的机理。两个模型的提出,使镦粗理论走向了正确、完善的阶段。Mechanics analysis of cylinder upsetting between flat platen and supporting ring was conducted. Rigid-plastic mechanics models for cylinders were presented. When the ratio of the height to the diameter, H/D, was larger than 1, rigid-plastic tensile stress mechanics model was presented while it was smaller than 1, shear stress mechanics model of static hydraulic zone was presented. The former breaks through the theory that there is three-dimensional compressive stress irrespective of the ratio of the height to the diameter. The latter explains satisfactorily the mechanism of layer-like cracks in the flanges of forged gear axles. The representation of the two models makes the upsetting theory into correct and perfect stage.

关 键 词：平板 漏盘 镦粗 拉应力 切向应力 

分 类 号：TG316.2[金属学及工艺—金属压力加工]