U形弯曲件模设计说明书.docVIP

河南职业技术学院 模具设计与制造专业 冷冲压专业课程设计说明书 课　 题：四角形弯曲件 院 系：机 电 系 班 级：模 具 112 专 业：模具设计与制造 姓 名：赵 新 亚 学 号：1 1 1 1 6 0 8 0 指导教师：鲁 子 亮 目录 第一章 工艺方案拟定·······································6 1.1材料分析··········································6 1.2结构分析··········································6 1.3毛坯展开··········································6 1.4方案确定··········································8 第二章弯曲工艺计算········································7 2.1冲压力计算·········································7 2.2模具工作部分尺寸计算······························9 第三章 模具总结构形式确定·······························8 第四章 冲压设备的选择 ··································12 第五章 弯曲模模架及零件设计·····························12 5.1后侧导柱模架的选用································13 5.2其它零件结构······································13 第六章 模具制造工艺过程·································13 6.1凹模制造工艺过程·································1 6.1凸模制造工艺过程·································16 第七章 模具各部分零件参数·····························16 第八章 橡胶垫的选用···································17 第九章 总装配及零件图·······································18 小结·················································19 参考文献·············································22 题目：四角形弯曲件成形工艺及模具设计 图纸: 技术要求：零件无毛刺，按IT14级。 材料:08F钢 料厚:1mm 板宽25mm. 设计资料(数据)及要求: 1、图纸 2、材料 3、批量 4、公差 均见图示 设计要求： 1、绘制主要零件图； 2、编制零件工艺规程； 3、绘制模具总装图和非标准零件图； 4、编写设计计算说明书。 第一章 工艺方案拟定 1.1、材料分析 该工件所用材料08F钢是常用的冲压材料，塑性较好,适合冲压加工 查表得：抗拉强度=300Mpa，屈服强度=180Mpa。 1.2、结构分析 该工件结构简单，形状对称，适合弯曲。工件弯曲半径为1mm,查表3.1（垂直于纤维），查表rmin=0.2t=0.2mm，即能一次弯曲成功。工件的弯曲直边高度为9-1-1=7mm，大于2t，因此可以弯曲成功。该工件是一个弯曲角度为90o的弯曲件，所有尺寸精度均未标注公差，而当r/t5时，可以不考虑圆角半径的回弹，所以该工件符合普通弯曲的经济精度要求。 该工件的弯曲工艺性良好，适合进行弯曲加工。 1.3、毛坯展开。 如图所示 毛坯总长度L=6*2+38+14.5*2=79mm 由表1可得：r/t=1则x=0.32，可以看出中性层的位移情况 r/t 0.1 0,2 0.3 0.4 o.5 0.6 0.7 0.8 1.0 1.2 x 0.21 0.22 0.23 0.23 0.25 0.26 0.28 0.30 0.32 0.33 r/t 1.3