设计简介
弯曲件的冲压成形工艺及模具设计
摘
内容及方向，有一定的设计意义。通过对该零件模具的设计，进一步加强了设计者弯曲模设计的基础知识，为设计更复杂的弯曲模具做好了铺垫和吸取了更深刻的经验。
本设计运用弯曲成型工艺及模具设计的基础知识，首先分析了板材的性能要求，为选取模具的类型做好了准备；然后计算了弯曲件的弯曲力，便于选取压力机吨位及确定压力机型号；最后分析了弯曲件的特征，确定模具的设计参数、设计要点及顶出装置的选取。
本设计采用了八字摆块复合模成型件。复合模具有生产效率高，制件精度高等特点，特别适合大批量高精度生产。成型原理可划分为两个阶段：首先，凸模与凹模共同作用成型U形件；凹模继续下行，迫使摆块左右摆动动作，U型件被再次弯曲成型，最后成型件，这种机构动作灵活可靠，设计方便，非常适合在本副模具中使用。
关键词：弯曲模 凸模 凹模 摆块
Bending stamping process and the mould design
Abstract：The requirement，content and direction of the design of the bending dies parts are embodied on this bending dies design. The designer’s foundation knowledge of the bending dies design is reinforced and is able to design more complex injection mould through the design.
Through the foundation knowledge, firstly, the composion and the perfourmance of the flat sheet is analyzed to choose the type of the mould. Secondly, the volume of the bend is estimated to choose the press molding machine and to detemine the type press machine and tonnage of press. Lastly the character of the part is analyzed to determine the mould design parameter and design point and choose the ejection assembly.Swing block compound die is used in this design to form the part.the compound die can produce pierced blanks to close flatness and dimensional tolerances. Compound die’sproduce efficiency and part precision is hight. Especially fit for volume produce and hight precision produce.Moulding of the part is like this :Fist,behing punch and die’s together operation, the part is form to the fast bending ;die is going down, swing block is flogged to work, and the second bending is begin. At last, the part is form to part. So, it is adapted to be used on this mould extraordinarily.
Keywords: bending dies , punch , dieg, swing block
目 录
1 绪论………………………………………………………………………1
1.1国内模具的现状和发展趋势……………………………………………1
1.2国外模具的现状和发展趋势……………………………………………3
2 弯曲件工艺性分析及方案的确定………………………………………4
2.1弯曲件工艺性分析………………………………………………………4
2.2弯曲工艺方案的确定……………………………………………………4
2.3弯曲件工艺方案分析……………………………………………………6
3主要设计计算………………………………………………………………7
3.1冲裁件主要设计计算……………………………………………………7
3.2弯曲件毛坯坯料尺寸的计算……………………………………………9
3.3弯曲应力的计算………………………………………………………10
3.4压料力的计算…………………………………………………………10
3.5压力机公称压力的确定………………………………………………11
3.6弯曲模工作部分尺寸的设计…………………………………………11
4模具类型的选择…………………………………………………………17
4.1具体结构选择…………………………………………………………17
4.2定位方式的选择………………………………………………………18
4.3出件方式的设计………………………………………………………18
5 主要零件的设计 ………………………………………………………19
5.1凸模的结构设计………………………………………………………19
5.2凹模的结构设计………………………………………………………22
5.3摆块的结构的设计……………………………………………………24
5.4定位零件的设计………………………………………………………26
5.5弹顶部件的设计………………………………………………………28
5.6导板的设计……………………………………………………………28
6 压力机的参数与校核 …………………………………………………29
7 模具零件的加工工艺 …………………………………………………30
7.1凸模的加工工艺过程…………………………………………………30
7.2凹模的加工工艺过程…………………………………………………31
8 模具的装配 ……………………………………………………………32
9 模具试冲时常见的故障及原因和调整方法 …………………………33
总 结……………………………………………………………………34
致 谢……………………………………………………………………36
参考文献………………………………………………………………… 37
