机械5

端罩的冲压成形工艺及冲压模具设计 摘要：本设计题目为端罩的设计，体现了深薄壁类零件的设计要求、内容及方向，有一定的设计意义。通过对该零件模具的设计，进一步加强了设计者冷冲模设计的基础知识，为设计更复杂的冷冲模具做好了铺垫和吸取了更深刻的经验。 本设计运用薄板类零件成型工艺及模具设计的基础知识，首先分析了零件的成分及性能要求，为设计拉深及冲裁模的数据指标做好了准备；然后计算了零件的体积，便于设计落料模的刃口尺寸；最后设计了模具的结构特征，确定了模具的设计参数、设计要点及推出装置的设计。 冲压加工分为分离工序和成形工序两大类。落料、打孔属于分离工序，拉深属于成形工序。设计任务是指导老师指定加工的零件为有孔拉深件，材料为铝L3，厚度为2mm，大批量生产，其他具体要求参照零件图。根据零件形状，需要采用落料、拉深、冲孔3个工序，为提高成倍提高生产效率，提高冲压件的质量，可采用落料和拉深过程集中于一套模具来完成，冲孔工序用简单模完成。 关键词：落料拉深冲孔 The drop-cyli
nder-shaped pieces of material,drawi
ng,pu
nchi
ng,trimmi
ng the compou
nd die desig
n Abstract：The desig
n of the sets of topics for the lo
ng i
njectio
n mold desig
n,reflects the deep thi
nwall plastic parts of the desig
n,co
nte
nt a
nd directio
n of a certai
n desig
n sig
nifica
nce.Parts of the mold through the desig
n,the desig
ner has bee
n further stre
ngthe
ned bythe i
njectio
n mold desig
n based o
n k
nowledge,for the desig
n of more complexi
njectio
n molds made a
nd lesso
ns foreshadowi
ng a more profou
nd experie
nce The use of thi
n desig
n parts moldi
ng process a
nd die desig
n of the basic k
nowledge,first of all parts of the compositio
n a
nd performa
nce requireme
nts for the desig
n a
nd drawi
ng Die data prepared for the target a
nd the
n calculate the size of the parts,for desig
n Bla
nki
ng the edge-size; fi
nal desig
n of the structure of the mold,a mold determi
ne the desig
n parameters,desig
n eleme
nts a
nd the i
ntroductio
n of the device desig
n. Cutti
ng a
ndpierci
ng belo
ng to separati
ng,pulli
ng a
nd stretchi
ng belo
ng to cale
nderi
ng.The spare parts fall to cut material-pull a
nd stretch compou
nd die a
nd multiple hole pu
nched die to process.The job is i
n order to process the multiple hole pu
nched die a
nd pull-stretch die desig
nwhich is give
n bythe tutor,the material is AL L3,the thick
ness is a 2 mm,the large qua
ntityqua
ntityproduce,other request to accordi
ng to the spare parts diagram i
n a specificway.Accordi
ng to the spare parts’shape,it
need to to cut material,to pull a
nd stretch,to pu
nched hole 3work,become for the exaltatio
n to raise the productio
n efficie
ncydoubly,raise tothe qua
ntityof part,to cut material a
nd to pull a
nd stretch adopt to compou
nd die to complete,to pu
nched hole adopt to pierce die to complete. Keywords:cut material ;pull a
nd stretch ; pierci
ng 目录 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1 1.2.1模具设计与制造能力状况1 1.2.2专业化程度及分布状况2 1.3冲压模具的发展重点与展望2 1.3.1冲压模具产品发展重点2 1.3.2冲压模具技术发展重点3 2成形制品的工艺性分析4 2.1冲裁件的结构工艺性4 2.2模具结构选择4 2.3确定工艺方案5 3加工工艺的设计7 3.1拉深工艺的设计7 3.1.1外形毛坯尺寸的确定7 3.1.2拉深模工作部分参数7 3.1.3工作部分尺寸的确定9 3.1.4工艺力的计算10 3.2冲压工艺设计12 3.2.1模具间隙的设计12 3.2.2凸凹模刃口尺寸计算13 3.2.3排样的设计15 4模具结构的设计17 4.1落料，拉深工序的结构设计17 4.2冲孔、切边工序的结构设计17 4.3模具工作过程19 5模具主要零件的结构20 5.1落料凹模20 5.2拉深凸模20 5.3凸凹模21 5.4弹性卸料板22 5.5冲孔凸模23 5.6垫板24 5.7其它零件25 6零件的加工28 结束语29 致谢30 参考文献31