消声器前盖冲压工艺及其模具设计.docx

消声器前盖冲压工艺及其模具设计.docx

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消声器前盖冲压工艺及其模具设计

消声器前盖冲压工艺及其模具设计

毕业设计说明书第I页

毕业设计说明书

消声器前盖冲压工艺及其模具设计

院（系）名称工学院机械系

专业名称材料成型及控制工程

2012年05月10日

消声器前盖冲压工艺及其模具设计

摘要

本设计分析消音器前盖冲压工艺,确定工艺方案及模具结构,论述了级进模的设计过程,同时还介绍了模具关键部位的结构设计，如:

凸模、凹模、凸模固定板、垫板、卸料板、弹簧、挡料销、导正销等。

模架采用标准模架，选用了合适的冲压设备。

设计中对工作零件和压力机规格均进行了必要的校核计算,实践证明:

模具结构合理,生产的零件符合要求。

关键词:

级进模，浮顶装置，冲孔，拉伸，翻孔，落料

毕业设计说明书第II页

Thefrontcoverofthemufflerstampingprocessanalysisandmolddesign

Abstract

Thisprojectanalysisdamperfrontcoverrammingcraft,thedefinitecraftplanandthemoldstructure,elaboratedtheleveltoentermold'sdesignprocess,meanwhileintroducedthemoldessentialspotstructuraldesign,forexample:

Theplunger,thelowerdie,theplungerdeadplate,thebackingstrip,unloadtheyardlumber,thespring,tokeepoffthematerialtosell,toleadaresellingandsoon.Thepouldframeusesthestandardpouldframe,hasselectedtheappropriaterammingequipment.Inthedesigncarriedontheessentialexaminationcomputationtotheworkcomponentsandthepressspecification,thepracticehadproven:

Themoldstructureisreasonable,theproductioncomponentsmeettherequirement.

Keywords:

Progressivedies,Floatingroofdevice,Punching,Stretching,Plunge,Cut

毕业设计说明书第III页

1绪论.....................................................................................................................................1

1.1冲压模具市场情况........................................................................................................1

1.2冲压模具水平状况..........................................................................................................2

1.2.1模具CAD/CAM技术状况......................................................................................3

1.2.2模具设计与制造能力状况..................................................................................4

1.2.3专业化程度及分布状况........................................................................................5

1.3冲压模具未来的发展重点与展望..................................................................................5

1.3.1冲压模具产品发展重点.........................................................................................5

1.3.2冲压模具技术发展重点.........................................................................................52冲压件工艺分析.....................................................................................................................7

2.1冲压件材料分析..............................................................................................................7

2.2冲压件结构工艺性及分析..............................................................................................7

2.3模具结构形式和选材......................................................................................................9

2.3.1模具结构形式........................................................................................................9

2.3.2模具材料选择........................................................................................................93冲压工艺方案的确定...........................................................................................................114工艺计算.........................................................................................................................12

4.1拉伸件展开尺寸计算.....................................................................................................12

4.2材料的规格的选择.........................................................................................................13

4.3排样图的设计与材料利用率的计算.............................................................................13

4.3.1排样图的设计......................................................................................................13

4.3.2材料利用率的计算.............................................................................................17

4.4冲压工艺力的计算.........................................................................................................17

4.4.1冲裁力..................................................................................................................17

4.4.2拉伸部分的拉伸力计算......................................................................................19

4.4.3卸料力及推件力的计算......................................................................................195模具主要零件设计与选择...................................................................................................22

毕业设计说明书第IV页

5.1圆形凸模的设计.............................................................................................................22

5.1.1凸模长度计算…………………………………………………………………………...23

5.1.2承压应力校验…………………………………………………………………………...23

5.1.3抗纵向弯曲应力的校核……………………………………………………………….24

5.1.4圆形凸模固定端面的压力……………………………………………………………25

5.2切断凸模设计……………………………………………………………………………………25

5.2.1凸模承压力校核………………………………………………………………………….26

5.2.2抗纵向弯曲应力的校核……………………………………………………………….26

5.2.3切断凸模固定端面的压力.................................................................................25

5.3拉伸凸模设计................................................................................................................27

5.3.1拉伸凸、凹模圆角半径及工作部分深度的确定.............................................29

5.3.2凸、凹模间隙.....................................................................................................29

5.3.3落料口大小的确定.............................................................................................29

5.4凹模的设计....................................................................................................................29

5.4.1凹模孔口形式及主要参数.................................................................................29

5.4.2整体式凹模外形尺寸的确定..............................................................................30

5.4.3凹模强度校核.....................................................................................................32

5.5弹簧的设计....................................................................................................................32

5.5.1设计弹簧的一般步骤..........................................................................................32

5.5.2弹簧类型的选择..................................................................................................33

5.5.3弹簧材料及许用应力..........................................................................................33

5.5.4弹簧相关几何尺寸的计算................................................................................35

5.5.5拉伸弹簧钩环强度验算……………………………………………………………….37

5.6凸模固定板的选择........................................................................................................38

5.7凸模垫板的选择...........................................................................................................386确定凸、凹模间隙及计算工作部分尺寸……………………………………………………….39

6.1冲裁间隙值的确定.........................................................................................................39

6.2凹、凸模刃口尺寸计算................................................................................................39

毕业设计说明书第V页

6.2.1确定凹凸刃口尺寸的原则..................................................................................39

6.2.2冲裁模刃口尺寸的计算方法..............................................................................39

6.2.3冲裁模刃口尺寸的计算......................................................................................407模具总体设计.......................................................................................................................43

7.1定位零件的设计与选择................................................................................................43

437.1.1挡料销的选择.....................................................................................................

7.1.2定位板的设计.....................................................................................................44

7.1.3止退块的设计.....................................................................................................44

7.1.4导料板的设计.....................................................................................................44

7.1.5导正销的设计.....................................................................................................45

7.2卸料装置的设计............................................................................................................45

7.2.1卸料板的设计.....................................................................................................45

7.2.2卸料弹簧的选择.................................................................................................48

7.2.3卸料弹簧有关尺寸计算.....................................................................................49

7.2.4卸料弹簧的窝座深度H和安装厚度B.............................................................50

D37.2.5安装孔内径和孔底厚度h值的选取............................................................51

7.3凸模固定板的设计.........................................................................................................52

7.4导向零件的选用.............................................................................................................52

7.5模架的选用....................................................................................................................538冲压设备的选择...................................................................................................................55

8.1冲压设备类型的选择.....................................................................................................55

8.2确定设备的规格.............................................................................................................559绘制模具图与撰写说明书...................................................................................................57

9.1装配图的绘制.................................................................................................................57结论.......................................................................................................................................58致谢.........................................................