机械5

摘要 冲压是机械制造业中一种较先进的加工方法，与切削加工相比，具有材料利用率高、制品力学性能好，互换性强、生产效率高等优点。我设计的这套复合模具，采用倒装复合模具冲压，因为倒装模具有许多的优点，比如说：制件精度高，由于是在冲床的一次行程内，完成数道冲压工序。因而不存在累积定位误差。使冲出的制件内外形相对位置及各件的尺寸一致性非常好，制件平直。生产效率高,模具结构紧凑，面积较校由于采用弹压卸料装置，使冲制出的工件平整，表面质量好。采用打料杆将工件或废料从凹模孔中打下，因而工件或废料不在凹模孔内积聚，可减少工件可废料对孔的涨力。从而可减少凹模的壁厚，使凹模的外形尺寸缩小，节约模具材料。 根据零件图的结构分析,该零件采用倒装复合模具冲压比较合理。该复合模具结构特点是：凸凹模安装在下模座上，采用弹压卸料装置将废料从凸凹模上卸下。而它的凹模是安装在上模座上，因而就存在着如何将凹孔内的工件从孔中排出的问题，故在凹模内安装推件块把凹模内的工件在冲压完成后推出。该模具一次冲压就可以冲出完整的产品。 本应用本专业所学课程的理论和生产实际知识进行一次冷冲压模具设计工作的实际训练从而培养和提高学生独立工作能力，巩固与扩充了冷冲压模具设计等课程所学的内容，掌握冷冲压模具设计的方法和步骤，掌握冷冲压模具设计的基本的模具技能懂得了怎样分析零件的工艺性，怎样确定工艺方案，了解了模具的基本结构，提高了计算能力，绘图能力，熟悉了规范和标准，同时各科相关的课程都有了全面的复习，独立思考的能力也有了提高。 关键词：1.冲压模具，2.凸模，3.复合模具，4.凹模，5.模具结构 Stampi
ng is a ki
nd of more adva
nced processi
ng machi
neryma
nufacturi
ng method,comparedwith the cutti
ng,with high material utilizatio
n a
nd good mecha
nical properties of the products,stro
ng i
ntercha
ngeability,high productio
n efficie
ncy,etc.I desig
n the compou
nd die,the use of i
nversio
n compou
nd stampi
ng mold,because the flip mold has ma
nyadva
ntages,such as: high precisio
n parts,because it is i
n a pu
nch stroke,complete stampi
ng process that
number.So there is
no cumulative positio
ni
ng error.Withi
n the parts made out of shape the relative positio
n a
nd the size of each piece ofverygood co
nsiste
ncy,flat parts.High productio
n efficie
ncy,the mould structure is compact,the area is small.Due to usi
ng pressure u
nloadi
ng device to produce artifacts level off,the surface qualityis good.Shot is expected to adopt theworkpiece orwaste from the co
ncave die hole layi
ng,thus theworkpiece orwaste,
not i
n the co
ncave die hole accumulatio
n,ca
n reduce theworkpiece ca
nwaste up force of hole.Which mayreduce thewall thick
ness of die,to make the shape of the die size,mould materials savi
ng. Accordi
ng to part drawi
ng of structure a
nalysis,the composite die stampi
ng parts adopt i
nversio
n is quite reaso
nable.The compou
nd die structure features are: i
nte
nsive i
nstalled i
n the mold base,with pressure u
nloadi
ng devicewillwaste awayfrom the i
nte
nsive.A
nd the die is mou
nted o
n the mold base,therefore there is howthe co
ncave hole of artifacts from the eductio
n i
n hole problem,so the ejecti
ng block boxi
nstalled i
n the die of the co
ncave die i
nworkpiece i
n stampi
ng is completed.The stampi
ng mold a ca
n out of the complete product. This paper applies the theoryof the courses i
n this major k
nowledge a
nd the productio
n practice for a cold stampi
ng die desig
nwork of practical trai
ni
ng to cultivate a
nd improve stude
nts'abilitytowork i
ndepe
nde
ntly,to co
nsolidate a
nd expa
nd the co
nte
nt of the course such as the cold stampi
ng mould desig
n,master the cold stampi
ng mould desig
n methods a
nd steps,with cold stampi
ng die mold,a basic desig
n skills lear
ned howto a
nalysis tech
nologyof compo
ne
nts,howto determi
ne the processi
ng pla
n,u
ndersta
nd the basic structure of mould,improve the abilityof calculatio
n,drawi
ng ability,familiarwith the
norms a
nd sta
ndards,a
nd related courses i
n all the subjects have a comprehe
nsive review,i
ndepe
nde
nt thi
nki
ng abilityhas bee
n improved. Keywords: 1.Stampi
ng die,2.Pu
nch,(3)composite mould,4.Die,5.The mould structure 目录 1绪论……………………………………………………………………1 1.1国内模具的现状和发展趋势…………………………………………1 1.1.1国内模具的现状………………………………………………2 1.1.2国内模具的发展趋势…………………………………………2 1.2国外模具的现状和发展趋势………………………………………2 1.2.1未来冲压模具制造技术的发展趋势………………………3 1.3冲压件模具设计与制造……………………………………………4 1.3.1冲压件模具设计的设计要点……………………………………6 1.3.2冲压件模具设计的进度………………………………………6 2.卡套冲压工艺与模具设计……………………………………………8 2.1冲裁件的工艺性分析……………………………………9 2.2确定工艺方案及模具结构形式……………………………………10 3必要的工艺计算……………………………………………………11 3.1排样设计…………………………………………………………11 3.2计算凹凸模刃口尺寸………………………………………………11 3.2.1冲孔直径为42mm的凸，凹模刃口尺寸计算………………12 3.2.2外形落料凸凹模刃口尺寸的计算………………………12 3.3冲压力的计算………………………………………………………13 3.4压力中心的计算……………………………………………………14 4.模具主要零部件的结构设计…………………………………………15 4.1凸，凹模，凹凸模的结构设计………………………………15 4.1.1落料凹模的设计………………………………………………16 4.1.2冲孔直径为42的凸模设计…………………………………16 4.2橡胶的选用和计算原则…………………………………………17 4.3模架的设计………………………………………………………18 5.冲裁模具的安装与调试………………………………………………20 5.1冲裁模具的安装…………………………………………………20 5.1.1冲空切断级进模装配的技术要求………………………………20 5.1.2冲裁模的装配……………………………………………………21 5.2冲裁模具的调试…………………………………………………21 5.2.1冲裁模的调试要点…………………………………………22 5.2.2调试方法………………………………………………………23 6.冲压设备的选择…………………………………………………………25 7.绘制模具总装图………………………………………………………26 8.结论………………………………………………………………………27 9.致谢………………………………………………………………………28 10参考文献………………………………………………………………29