拖拉机备轮架连扳落料冲孔复合模设计
毕业论文关键词：精度；连接件；落料冲孔
Abstract The Connection plate parts is the one we see in real life the tractor for part of the wheel frame, due to the importance of this part, demand is bigger also, so after many considerations here with cold stamping process technology to make the mold and production. In this paper, by adopting case fitted on punch and mold structure on the whole selection of inversion compound die instead of in the past often use formal compound die, the advantage is not easy to drop waste on a mold surface an convenient to operate, better solved in the design of the mold manufacturing difficulty. Select mold structure, then consider the center of the layout design, burst pressure and the pressure calculation, determine the intensive fixed size, locate the connection parts of design, equipment selection, mold total height check and mold assembly and so on. Because the precision of the mold is higher, so in the use process must carry on the reasonable maintenance,timely find problems and to repair and correct immediately, so that we can guarantee the quality of the product level.,and ultimately achieve the goal of improving die life!
Keywords: Precision;Fitting;Blanking punch.
目 录
第一章 零件图纸及技术要求.1
1.1 零件图.1
1.2 技术要求.1
第二章 冲压工艺分析与模具设计2
2.1零件的工艺性分析2
2.2确定冲压工艺方案2
2.3模具结构的选取3
第三章 工艺设计与相关计算.4
3.1 排样设计.4
3.2冲压力与压力中心计算5
3.3 工作零件刃口尺寸计算.6
3.4 工作零件结构尺寸.8
3.5 小孔冲裁凸模尺寸的计算11
第四章 模具其他零部件设计与选取.13
4.1 定位零件设计：导料销、挡料销13
4.2 连接与固定零件13
4.3 冲压设备的选用14
4.4 闭合高度校核14
4.5模具总装配.15
结束语16
致谢.17
参考文献.18
第一章 零件图纸及技术要求
1.2 技术要求
1.工件名称：连接件；
2.生产批量：大批量；
3.材 料： Q235；
4.料 厚：2 ；
5.模具总寿命不低于 万次；
6.工件外观必须平顺，毛边、毛刺等均需去除。
第二章 冲压工艺分析与模具设计
2.1零件的工艺性分析
2.1.1材料：Q235；具有优良的冲压性能，且是一种塑性优良的碳素结构钢；
2.1.2工件的结构：如图1.1所示，零件可分为冲孔和落料两大部分，零件结构形状简单对称。
2.1.3尺寸精度：（查文献《互换性与测量技术基础》表2—4标准公差数值）可知零件中：两边孔尺寸精度为中等精度。其它的的尺寸都没有把公差标注出来，其应属于自由尺寸，所以按IT14级确定工件的尺寸公差，尺寸精度满足一般的冲裁要求。
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