矩形盒变压料方式拉深中应变路径的有限元分析  

Finite element analysis of strain path in rectangular case drawing with variable blank holder mode

作　　者：李治国 鄂大辛[2] 常进明 李德府 

机构地区：[1]博世汽车部件(长沙)有限公司,长沙410100 [2]北京理工大学材料科学与工程学院,北京100081 [3]山西北方惠丰机电有限公司,长治046012

出　　处：《现代制造工程》2008年第10期41-44,共4页Modern Manufacturing Engineering

摘　　要：利用有限元方法模拟五种不同压料方式及压料力控制的矩形盒拉深过程。其中,曲边锥面压料拉深有利于法兰曲边材料向直边扩散,沿拉-压路径变形的质点变形量有所增大。平、曲面分块变压料力拉深降低法兰曲边变形抵抗,但质点应变轨迹控制效果不明显,可相应提高拉深成形性。直边设置拉延槛的矩形盒拉深可将质点变形轨迹基本控制在拉压变形区,缓解凸模转角断裂危险区内双拉变形状态,提高拉深成形极限的效果相对显著。Illustrates that using finite element method to simulate rectangular case drawing process with 5 kinds of blank holder modes and blank holder force. In which, drawing with curve-edged cone blank holder is beneficial to the materials of flange curved edge flowing to the straight edge, and along stretching-compressing deformation path the deformation of particle increases. The variable blank holder force drawing of plane and curve blocking can reduce the flange curved edge＇ s deformation resistance and can improve the property of drawing deformation, but the control effect of particle strain trace is not obvious. Setting drawbeads on straight edge in rectangular case drawing can control particle＇ s deformation trace in stretching-compressing deformation area basically and moderate double stretch deformation state in the rapture-risk-area of punch comer. The effect on improving drawing limit is relatively obvious.

关 键 词：矩形盒拉深 曲面压料 变压料力 应变路径 成形极限 

分 类 号：TG386.3[金属学及工艺—金属压力加工]