板料拉弯结构弯曲模的凹模圆角半径分析  

Analysis on shoulder radius of die in sheet-metal bending die with stretch construction

作　　者：施于庆[1] 

机构地区：[1]浙江科技学院机械与汽车工程学院,杭州310023

出　　处：《浙江科技学院学报》2016年第5期344-349,共6页Journal of Zhejiang University of Science and Technology

摘　　要：拉弯结构的模具设计有助于减小U形件弯曲后的回弹,但模具的凹模圆角半径设计会对抑制回弹的效果产生影响。通过拉弯时板料受力情况分析计算得出:凹模圆角半径大于凸模圆角半径,U形件有向内侧回弹趋势;凹模圆角半径小于凸模圆角半径,U形件有向外侧回弹趋势;而凹模圆角半径等于凸模圆角半径,则控制回弹的效果最理想。The die construction with stretch bending is useful to reduce springing back after bending of U-shape. But springing back is affected by shoulder radius of die. Analysis on its load conditions in sheet-metal for U-shape is given. The calculation results show that when shoulder radius of die is larger than shoulder radius of punch, springing back of U-shape is inside; when shoulder radius of die is smaller than shoulder radius of punch, springing back of U-shape is outside;when shoulder radius of die is equal to shoulder radius of punch, result of controlling springing back is ideal.

关 键 词：拉弯模具 凹模圆角半径 分析计算 回弹 

分 类 号：TG386.32[金属学及工艺—金属压力加工]