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.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
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)
关键词
平板
漏盘
镦粗
拉应力
切向应力
flat platen
supporting ring
upsetting
tensile stress
shear stress
