锥形凸台体积成形的一种合成力学模型  

A resultant mechanical model for the forming process of cone boss

作　　者：刘德学[1] 秦小琼[2] 

机构地区：[1]兰州理工大学材料科学与工程学院 [2]兰州理工大学机电工程学院,兰州730050

出　　处：《塑性工程学报》2008年第4期90-93,共4页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50571042)

摘　　要：锥形凸台成形是金属体积成形工艺中一种典型的局部成形。该文通过分析锥形凸台在不同体积成形工艺中的成形机理,基于模块化思想,将其成形过程划分为挤压成形与角部充满两个特征时段,并将两个特征时段的滑移线场力学模型有机联结,构建了锥形凸台成形过程的一种滑移线力学模型,并介绍了应力场与变形力的求解方法。该模型丰富了金属体积成形过程的特征单元库,可套用于局部成形的应力场与变形力求解,实现局部成形的模具优化设计。The forming process of cone boss is one of typical local process in metal bulk forming.In this paper,it is divided into two characteristic time-interval based modular design method,one is extrusion processing,the other is the process of the die corner overflowed by deformable body.Then the mechanical models of those two are superposed based on slip-line field theory.The resultant mechanical model is used for solution of deforming force and stress field in open-die forging with a cone boss.In this way,the characteristic element model library of metal bulk forming can be enriched,the optimum design of local forming process can also be realized at the same time.

关 键 词：锥形凸台 特征时段 滑移线 力学模型 

分 类 号：TG302[金属学及工艺—金属压力加工] O165.6[理学—数学]