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目 录

§前言 任务描述 ····································· 1 一. 冲压件工艺性分 ·································· 2 二. 冲压工艺方案的确定 ······························ 2 三. 主要设计计算 ···································· 2

（1）排养方式的确定以及计算 ······························· 2 （2）冲压力的计算 ········································· 2 （3）压力中心的确定及相关计算 ····························· 3 （4）工作零件刃口尺寸计算 ································· 3 （5）卸料橡胶的设计 ······································· 4

四. 模具总体设计 ···································· 4

（1）模具类型的选择 ······································· 4 （2）定位方式的选择 ······································· 4 （3）卸料，出件方式的选择 ································· 4 （4）导向方式选择 ········································· 5

五. 主要零部件设计 ·································· 5

（1）主要零件的结构设计 ··································· 5

a.落料凸模 ·············································· 5 b.冲孔凸模 ·············································· 5 c.凹模 ················································· 5 （2）定位零件的设计 ······································· 6 （3）导料板的设计 ········································· 6 （4）卸料板部件设计 ······································· 6 （5）模架及其他零部件设计 ································· 6

六. 模具总装图 ······································ 7 七. 冲压设备的选定 ·································· 7 八. 工作零件的加工工艺 ····························· 7 九. 模具的装配 ····································· 8 十．设计小结 ······································· 9 附图 装配图 ········································10

（参考文献）·····························································11

冲裁模设计说明书

冲裁模设计：

根据给定工件图设计冲裁模具。工件尺寸如图所示，料厚t=1, 材料:紫铜; 大批量. 要求: 1.完成模具总装图(3D电子文档); 2.完成总装配图,图纸符合国家制图标准; 3.绘制工程图,图纸符合国家制图标准. 4.编写设计说明书.(A4纸打印)

工件图

工件名称：垫片

工件简图：如图所示 生产批量：大批量 工件材料：紫铜 材料厚度：1 mm

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一. 冲压件工艺性分析

此工件只有冲孔和落料两个工序。材料为紫铜，具有良好的冲压性能，适合冲裁。工件结果简单，有2个直径10mm的孔；孔与孔，孔与边缘之间的距离满足要求，工件的尺寸全部为自由公差，可看着IT14级，尺寸精度底，普通冲裁就能满足要求。

二. 冲压工艺方案的确定

该工件包括落料 冲孔 两个基本工序，可有以下三种工艺方案： 方案一：先落料，后冲孔。采用单工序模生产。 方案二：落料—冲孔复合冲压。采用复合模生产。 方案三：冲孔—落料级进冲压。采用级进模生产。

方案一模具结构简单，但需要两道工序两套模具，成本高而生产效率低，难以满足大批量生产要求。

方案二只需一套模具，工作精度及生产效率都比较高，但制造难度大，并且冲压成品件留在模具上，清理模具上的物料影响冲压速度，操作不方便。

方案三也只需要一副模具，生产效率高，操作方便，设计简单，由于工件精度要求不高，完全能满足工件技术要求。

通过对上述三种方案的分析比较，该件的冲压生产采用方案三为最佳。

三. 主要设计计算

（1）排养方式的确定以及计算

设计级进模，先要设计条料排样图。工件图可视为一矩形中间两个孔，直排材料利用率最高。如 图一 所示的排样方法，可减少废料。第一次冲裁使用活动挡料销，然后第二次可用固定挡料销。搭边值取1.5mm，壁厚取2.5mm，条料宽度为65mm，步距为31.5mm，一个步距的材料利用率为88%（计算见 表一）

（2）冲压力的计算

该模具采用级进模，选择弹性卸料，下出件。冲压力的相关计算见 表一 根据计算结果，冲压设备拟选择 J23-25。

图一 排样图

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