设计简介
摘 要
本课题所设计的零件是较为典型的U型弯曲件。工件一侧有一个腰圆孔。通过对零件各部分进行计算分析后最终确定加工工序。经计算得翻边可以一次成型，工件整个成型过程所涉及的工序有：落料、冲孔、弯曲三步。在对零件进行工艺分析后，确定最终工艺方案为：落料冲孔复合，弯曲顺次进行。在确定工艺方案的基础上对主要模具进行设计，分析工件成型过程，并画出模具装配图及零件图。在本次设计中主要对落料复合模以及、弯曲模进行设计。
关键词：落料冲孔；冲小孔；翻边；弯曲
Punching Process Analyzed and Die Design of the U Shape GrooUe
ABSTRACT
Typical bended workpiece of U shape with three folds was designed in this graduation project. Two hoes are flanged on one side with a Φ1.8 mm hole. There are three holes on the other side. The process was determined by calculating and analyzing. Flanging can be shaped by one step after calculating. FiUe steps as blanking, punching, punching a small hole, flanging and bending were included. Analyzed the technics of parts, the final process was determined as four steps: blanking-punching compound, punching a small hole, flanging and bending. Besides, the main dies were designed, the process was analyzed, and the die assembly and workpiece pictures were drawed. In this graduation project, blanking-punching compound die, punching a small hole die, flanging die and flanging die were designed.
Key words: blanking-punching compound; punching a small hole; flanging; bending
目 录
摘 要 IU
ABSTRACT U
１前 言 1
1.1 模具加工及金属薄板冲压加工的特点及优势 1
1.2 课题讨论及难点分析 2
1.3 课题总体设计思路 3
2工艺分析及工艺方案确定 5
2.1工件的零件图 5
2.2工艺分析 5
2.2.1弯曲部分工艺分析 6
2.2工艺方案的确定 6
3落料冲孔模的设计 9
3.1毛坯尺寸计算 9
3.2 排样 9
3.3 确定模具压力中心 10
3.4 冲压力的计算 10
3.4.1 落料力 10
3.4.2冲孔力 11
3.4.3卸料力 11
3.4.4推件力 11
3.4.5总冲压力 11
3.5冲压设备的选择 11
3.6工作部分尺寸计算 12
3.6.1落料凸、凹模刃口的尺寸计算 12
3.6.2冲孔凸、凹模的刃口尺寸 13
3.7冲孔落料复合模的设计 14
3.7.1落料冲孔复合模结构的设计 14
3.7.2 落料冲孔复合模主要零件的设计 15
4弯曲模的设计 30
4.1确定模具压力中心 30
4.2弯曲力的计算 30
4.3冲压设备的选择 30
4.4翻边模刃口尺寸计算 30
4.5弯曲模的设计 31
4.5.1弯曲模结构的设计 31
4.5.2弯曲模主要零件的设计 32
5结 论 36
谢 辞 37
参考文献 38
