小钣金件冲孔翻边复合模设计  

Small sheet metal parts punching flanging compound die design

作　　者：孙令真 陈运胜 SUN Lingzhen;CHEN Yunsheng

机构地区：[1]广州华立科技职业学院电力与智能制造学院,广东广州511325

出　　处：《模具技术》2022年第4期12-15,共4页Die and Mould Technology

基　　金：2021年广东省普通高校特色创新类项目(编号:2021KTSCX349)。

摘　　要：形状不规则的小钣金件很难精确定位,所加工的翻边孔不合格率高。为解决这个问题,将冲底孔与翻边两个工序设计成复合模具,将上模设计成台阶,台阶的小头为冲孔模凸模,大头为翻边模凸模,将下模的刀刃部分设计成可以上、下运动的凹模芯。在凹模芯底部设置滑块、斜楔、滑块弹簧、凹模复位弹簧等模具零件。当上模升降时,带动凹模芯同步升降,可以实现冲孔凹模与翻边凹模的切换,从而在一个冲压循环中完成冲底孔及翻孔两道工序,保证了冲孔翻边两个工序的同心度,提高产品的合格率。同时凹模芯在复位过程中将产品顶出,有效提升了生产效率。Small sheet metal parts with irregular shape are difficult to locate accurately,and the flanging hole processed by them has a high unqualified rate.To solve this problem,the two processes of punching bottom hole and flanging are designed using compound die.The upper die is designed as a step,the small head of the step is a punching punch,the big head of the step is a flanging punch,and the cutting edge of the lower die is designed as a die core that can move up and down.At the bottom of the die core,a slide block,an oblique wedge,a slide block spring,a die return spring and other die parts is provided.When the upper die rises and falls,it drives the die core to rise and fall synchronously,which can realize the switch between punching die and flanging die.Thus,hole punching and flanging processes are completed in a punching cycle.It improves the concentricity of punching and flanging process,and the qualified rate of products.At the same time,the die core ejects the product out in the return stroke,which effectively improves the production efficiency.

关 键 词：小钣金件 冲孔 翻边 复合模具 凹模芯 

分 类 号：TG385.2[金属学及工艺—金属压力加工]