机械5

畸形拨叉工艺和双孔钻模夹具设计 摘要 畸形拨叉是某企业产品中的关键零件之一，本课题要求根据企业生产需要和畸形拨叉零件的加工要求，首先完成零件的加工工艺规程设计，在此基础之上，选择其关键工序之一进行专用夹具，并完成必要的设计计算。本机床所用夹具的通用性强，工件采用定位夹紧，快速方便。夹紧采用手动加紧，采用这种方式完全能够满足精度要求。而且简易方便，制造成本低，通用性好。由于畸形拨叉的生产量比较大，为了保证产品质量，提高加工效率，需要对其加工工艺进行优化设计，并在关键工序使用组合机床或专用机床进行加工。 通过设计，综合运用了大学期间的多数基础和专业知识，加深所学知识体系，掌握了运用各项绘图软件进行设计的方法和技巧,熟悉了工程应用设计。 关键词畸形拨叉零件分析工艺路线夹具设计组合机床 Abstract The axile bush is o
ne of the key parts of a
n e
nterprise products, this text expou
nds mai
nly the machi
ni
ng tech
nology a
nd the desig
n of clampi
ng device of the co
n
necti
ng rod a
nd modular machi
ne tool of the axile bush.The precisio
n of size, the precisio
n of profile a
nd the precisio
n of positio
n, of the co
n
necti
ng rod is dema
nded highly, a
nd the rigidity of the co
n
necti
ng rod is
not e
nough, easy to deform,so arra
ngi
ng the craft course,
need to separate the each mai
n a
nd superficial thick fi
nish machi
ni
ng process. Reduce the fu
nctio
n of processi
ng the surplus, cutti
ng force a
nd i
nter
nal stress progressively, revise the deformatio
n after processi
ng, ca
n reach the specificatio
n requireme
nt for the part fi
nally.As the output of the axile bush isvery large,it is
need to make optimal desig
n for the machi
ni
ng tech
nology a
nd use modular machi
ne tool for pivotal machi
ni
ng process,to e
nsure product quality a
nd to improve the processi
ng efficie
ncy. Through this desig
n,the k
nowledge of more basic a
nd specialtywas sy
nthetically applited.The system of k
nowledgewe lear
nedwas i
nte
nsified.Co
ntrolled to make use ofvarious method a
nd tech
niques that the pai
nti
ng software carry o
n a desig
n,the desig
n of e
ngi
neeri
ng applicatio
nwas k
now
nwell. Keywords Axile Bush Precisio
n Processi
ng Tech
nology Desig
n of Clampi
ng Device Modular Machi
ne Tool 目录 摘要II Abstract 1 一、前言3 2零件工艺性分析4 2.1零件的作用4 2.2零件的工艺分析4 3畸形拨叉工艺规程设计5 3.1工艺规程的作用5 3.2毛坯的确定5 3.3定位基准的选择6 3.4制定工艺路线6 3.5毛坯尺寸的确定与机械加工余量9 3.6确定切削用量及基本工时9 第4章钻模夹具设计18 4.1设计要求18 4.2夹具设计18 4.2.1定位基准的选择18 4.2.2切削力及夹紧力的计算19 4.3定位误差的分析22 4.4钻套、衬套、钻模板设计与选用23 4.5确定夹具体结构和总体结构24 4.6夹具设计及操作的简要说明25 4总结26 参考文献27 致谢28