摘要：设计的工件是连接支架。从工件结构分析，工件有冲孔、落料、弯曲、压筋4种组成，工件形状成对称的结构。根据工件图给定的技术要求、材料等要求来确定模具的冲压设计方案、模具类型、结构，从工件的的精度等级确定模具制造精度等级，选取模具零件的制造设备，贴切实际生产的角度出发，保证工件冲压生产精度，最后选取该工件的冲裁模具设计方案采用了级进模具冲裁。模具设计前主要根据相关的公差测量资料，查找工件图纸中未标注公差的极限偏差，根据尺寸公差来确定模具制造的精度，经过多次的排样分析以后，开始进行模具的结构设计，并进行相关设计计算；所有的设计方案确定以后开始绘制模具草图、装配图、零件图、编写技术要求、设计说明书。48315

毕业论文关键词： 级进模具；连接支架；排样方案设计；结构分析设计

Multi-position progressive die of connecting bracket

Abstract: Design of the workpiece is connected to the bracket.From the structure of the workpiece, the workpiece has punching, blanking, bending, compression, and so on 4 kinds of components, the shape of the workpiece into a symmetrical structure. According to the requirements of the technical requirements of the workpiece in a given graph and material to determine design scheme of die stamping, mold type, structure, from the level of the accuracy of the workpiece determined the mold manufacturing precision grade, mold manufacturing equipment selection, appropriate practical point of view, stamping parts production precision assurance, finally selects the workpiece punching blanking die design using the level into the mold and punching. Mold design mainly according to the measurement data, find the workpiece drawings unlabeled tolerance limit deviations, according to the dimensional tolerances to determine precision mold manufacturing, after multiple layout analysis to design of die structure, and carry out related design calculation; all the design after determining the start sketching the mold and assembly drawings, part drawings, preparation of technical requirements, design specifications.

Key words: progressive five; connecting bracket;layout design;structure analysis and design 

 目  录

1  前言 1

1.1  冷冲压模具概述和发展 1

1.2当前模具的技术水平 1

1.3冲压模具的优势 2

2  工件工艺分析 3

2.1  工件材料分析 3

2.2  工件结构形状分析 4

2.3  尺寸精度 4

3  冲压工艺方案确定 5

3.1  冲裁工艺方法的选择 5

4  工艺参数计算 7

4.1  弯曲展平尺寸计算 7

4.1.1  弯曲中性层确定 7

4.1.2  弯曲件展平尺寸计算 7

4.2  冲裁工件的排样 8

4.2.1  搭边值的确定 9

4.2.2  送料步距与条料宽度的计算 10

4.3  冲压力的计算 11

4.3.1  冲裁力的计算 12

4.3.2  卸料力计算 12

4.3.3  弯曲力的计算