汽车覆盖件冲压模具设计

目 录

关键词：刹车片附件 弯曲 冲压模 ............................................................... 1

Key words：Brake Accessory；Bending ；Punching Die； ................................ 2

第1章 零件的工艺性分析和工艺方案的确定 ................................................... 4

1.2 确定冲裁工艺方案 ......................................................................................................... 5

1.3 模具结构形式的确定 ..................................................................................................... 5

第2章 模具设计工艺计算 ................................................................................... 6

2.1毛坯尺寸的计算 .............................................................................................................. 6

2.2 回弹量的计算及弯曲参数的选择 ................................................................................. 6

2.3排样、步距的确定 .......................................................................................................... 7

2.3.2步距 ............................................................................................................................... 8

2.4材料利用率的计算 .......................................................................................................... 8

第3章 冲裁力的计算 ........................................................................................... 8

3.1 冲裁部分冲压力的计算 ................................................................................................. 8

3.1.1切断时冲裁力的计算 ................................................................................................... 8

3.1.2冲孔时冲裁力的计算 ................................................................................................... 9

3.1.3 卸料力、推件力的计算 .............................................................................................. 9

3.2弯曲部分冲压力的计算 .................................................................................................. 9

3.2.1弯曲力的计算 ............................................................................................................... 9

3.2.2 顶件力的计算 ............................................................................................................ 10

第4章 模具压力中心与计算 ............................................................................. 11

第5章 工作部分尺寸计算 ................................................................................. 13

5.1冲裁间隙 ........................................................................................................................ 13

5.1.1 间隙对尺寸精度及模具寿命的影响 ........................................................................ 14

5.1.2 合理间隙值的确定原则 ............................................................................................ 14

5.1.3 合理间隙值的确定 .................................................................................................... 15

5.2冲裁模刃口尺寸的计算 ................................................................................................ 15

5.2.1 凸、凹模刃口尺寸计算原则 .................................................................................... 15

5.2.2 冲裁凸、凹模刃口尺寸计算 .................................................................................... 15

5.3弯曲刃口尺寸的计算 .................................................................................................... 18

5.3.1 凸、凹模圆角半径的确定 ........................................................................................ 18

5.3.2 凹模深度的确定 ........................................................................................................ 19

第7章 压力机的校核 ......................................................................................... 36

1 汽车覆盖件冲压模设计

摘要：本次设计是从汽车覆盖件模板支架的工艺性分析开始，根据工艺要求来确定设计的基本思路。在分析冲压变形过程及冲压件质量影响因素的基础上，经过方案比较，选择级进冲模作为该模具工艺生产方案。然后设计模具的工作部分，即凸、凹模的设计。包括冲压工艺计算、工艺方案制订和冲模设计以及典型零件的工艺分析。

设计中涉及冲压变形过程分析、冲压件质量及影响因素、间隙确定、刃口尺寸计算原则和方法、排样设计、冲压力与压力中心计算、冲压工艺性分析与工艺方案制定、冲压典型结构、零部件设计及模具标准应用、冲模设计方法与步骤等。根据模具的装配原则，完成模具的装配，装配模具试冲通过试冲可以发现模具设计和制造的不足，并找出原因给予纠正，并对模具进行适当的调整和修理， 本冲压模设计完全能生产出合格的零件。

关键词：汽车覆盖件 冲压模

2 The Design of Punching Die for Brake Accessory

Abstract：At present,the Die design is specially the stamping Die design Playing an increasingly

important role in modern manufacturing industries.This design is starts from the Process

Analysis of Parts and determines the design’s Basic ideas according to the Process requirement.

On the basis of analysis of deformation process in the stamping process and factors affecting the

quality of stamping parts，After the programme compared，we take the compound die as the craft

production programme，then the work parts design，that is the convex mold and the concave

mold design.Including the stamping process calculation, the craft programme formulates and the