管轴压精密成形过程中管坯脱模点的预测  

PREDICTION OF NOOE SEPARATING FROM DLE IN TUBE AXIAL COMPRESSIVE PRECISION FORMING PROCESS

作　　者：孙志超[1] 杨合[1] 李明奇[1] 

机构地区：[1]西北工业大学材料科学与工程学院,西安710072

出　　处：《塑性工程学报》2001年第2期86-88,共3页Journal of Plasticity Engineering

基　　金：国家自然科学基金! (5 9775 0 5 5 )资助项目

摘　　要：管轴压精密成形过程中 ,存在着管坯脱离模具而由约束变形到自由变形的转变 ,因而明确管坯脱模点的位置 ,将对整个成形过程的研究具有重要意义。本文采用有限元数值模拟 ,对成形过程中管坯的脱模特性及其影响因素进行了研究 ,结果表明 :管轴压成形过程中管坯的脱模状况 ,受到变形几何参数和材料参数的共同作用 ,其中几何参数是影响管坯脱模点位置的决定因素 。The forming modes of tube blank change from constrained deformation to free deformation in tube axial compressive forming process, it is important to know the position of node separating from die for study of the process. In this paper, the characteristic of node separating from die and effects of forming parameters are investigated by finite element simulation. The results show that: the behavior of nodes separating from die is affected by geometric parameters and material properties; the position of node leaving the die depends mainly on geometric parameters, the material properties have an significant influence on the deforming force. Key words:tube axial compressing;precision forming;nodes separating from die; FEM; free deformationn exists between two benzoic ether site of the adjacent molecules, which caused the formation of a one dimensional saw toothed supramolecule.

关 键 词：管轴压精密成形过程 管成形 脱模点 有限元 自由变形 

分 类 号：TG306[金属学及工艺—金属压力加工]