工艺孔和定位销等对纵梁翼边孔高度尺寸的影响  

Effects of auxiliary holes and locating pins on height dimension in the wing side hole for the longitudinal beam

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》2017年第5期334-338,共5页Journal of Zhejiang University of Science and Technology

摘　　要：平板汽车纵梁工艺孔对准定位销放入进行弯曲作业,现有模具结构难以保证纵梁弯曲后侧壁孔到纵梁底部的高度尺寸要求,而定位销直径很难由模具设计人员确定。定位孔与定位销直径之差或间隙越小,高度尺寸容易保证但冲压作业困难;定位孔与定位销直径之差或间隙越大,高度尺寸不容易保证但冲压作业顺利。今对板料上的工艺孔对准放入定位销后最大移动进行分析计算,结果显示板料和推板往一侧移动,而纵梁侧壁孔到纵梁底部的高度尺寸超差。因此设计出推板宽度与凹模两侧间隙配合结构的模具,能解决高度尺寸超差。As bending form is carried out when auxiliary holes aligned and loaded with locating pins in the plate truck,the existing press-tool structure is difficult to meet the requirement of height dimension from the wing side hole to bottom of the longitudinal beam which is being bent,while the diameter of the locating pin is difficult to determine for the press-tool designer.The larger difference in diameter between the auxiliary hole and the locating pin,the higher bending precision is guaranteed,and the more difficult it is for press-working.On the contrary,the smaller difference in diameter between the auxiliary hole and the locating pin,the lower bending precision is guaranteed,and the easier it is for press-working.The paper analyzes and calculates the maximum movement after auxiliary holes of sheet-metal aligned and loaded with locating pins in the top plate.The results show that the sheet-metal and the top plate move onone side,with the deformed height dimension from the wing side hole to bottom of the longitudinal beam.Therefore,construction of a press-tool designed is presented by fitting the top plate width and gap of the die on both sides,the oversized problem of height dimension can be solved.

关 键 词：U形件 弯曲 工艺孔 定位销 

分 类 号：TG386.32[金属学及工艺—金属压力加工]