The Size Effects on Process Design of Micro Deep Drawing

This paper suggested to reformulate cylindrical deep drawing parameters with dimensionless form. A diagram, in which a feasible zone is drawn to bound both the maximal allowable tension and compression stress during the deep drawing process, was established. Since it is presented in a dimensionless form, it may be applied for both conventional and micro deep drawing. Cylindrical cup deep drawing was taken as an example to show the dimensionless process design method. In addition, the size effects should be taken into account. Two kinds of size effects on micro deep drawing were investigated, which can be explained by surface layer model and strain gradient model. Numerical simulations were carried out to compare the strain distribution with or without consideration of size effect.     

利用EXCEL软件进行冷冲模辅助设计

随着产品更新换代频率的加快，冷冲压模具设计工作量也越来越大，所以采用计算机辅助设计势在必行，并大大显示出计算机用于该方面设计的优越性。１选用 ＥＸＣＥＬ软件进行辅助设计的原因 因冷冲模设计需进行大量的模具刃口尺寸、模具其它部分尺寸和材料利用率等计算，又要查阅大量表格，并有很多的结构工艺示意图。设计人员每设计一套模具需大量计算工时，往往计算工时多于绘图工时。以汽车某一长方形壳体冲压件为例，该制件需３次拉延，每一次拉延模具与制件半成品有关尺寸计算就需２４ ｈ（利用计算器计算）；而利用ＥＸＣＥＬ软件计算…     

动态显式有限元法在冷冲压加工模拟中的应用

介绍了动态显式有限元法的原理、特点和应用,并用动态显式有限元法对机车车辆的转向架交叉杆冷冲压加工过程进行计算机模拟分析.模拟分析的结果说明了动态显式有限元法在模拟像冲压加工这种大变形过程中的优越性.     

简易模具制作冷冲压成形钣金件工艺分析

论述了简易模具的设计结构、工作原理以及制作。并对简易模具制作冷冲压成形钣金件的工艺性和对经济的低成本成形模具的需要进行了分析。     

菲林光栅冷冲压复合模设计

本文的目的是要设计一副用于加工菲林光栅的冷冲压模。为了保证工件孔与孔以及孔与边的相对位置精度；又由于工件的材料薄，凹凸模之间的间隙很小，所以采用带浮动模柄的复合模具一次冲压完成工件的所有轮廓尺寸。实践表明，该模具冲出的工件形状可靠，质量优良，满足工件的使用要求。