机械5

摘要 末端传动壳体工艺规程及其工装夹具设计是包括零件加工的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析，了解零件的工艺再设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线；接着对零件各个工步的工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量；然后进行专用夹具的设计，选择设计出夹具的各个组成部件，如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件；计算出夹具定位时产生的定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。 工装夹具是在学完了机械制图、机械制造技术基储机械设计、机械工程材料等进行设计之后的下一个教学环节。正确地解决一个零件在加工中的定位，夹紧以及工艺路线安排，工艺尺寸确定等问题，并设计出专用夹具，保证零件的加工质量。本次设计也要培养自己的自学与创新能力。因此本次设计综合性和实践性强、涉及知识面广。所以在设计中既要注意基本概念、基本理论，又要注意生产实践的需要，只有将各种理论与生产实践相结合，才能很好的完成本次设计。 关键词：末端传动壳体工艺；工艺规程，夹具设计，切削用量；定位误差 Abstract The process specificatio
n a
nd fixture desig
n of the e
nd drive shell i
nclude three parts: the process desig
n, the process desig
n a
nd the special fixture desig
n. I
n the process of desig
n should first u
ndersta
nd the a
nalysis of parts, parts of the process to desig
n a bla
nk structure, a
nd choose the good compo
ne
nts the processi
ng datum, desig
ns the process routes of the parts; the
n the parts of each labor step process size calculatio
n, is the key to decide the craft equipme
nt a
nd the cutti
ng process of thevarious desig
n parameters; the
n a special fixture, the fixture selectio
n for thevarious compo
ne
nts of the desig
n, such as co
n
necti
ng parts positio
ni
ng eleme
nts a
nd clampi
ng eleme
nts, guide eleme
nt, fixture a
nd machi
ne tool a
nd other compo
ne
nts; positio
ni
ng error is calculatedwhe
n the fixture, a
nalysis the ratio
nality a
nd shortcomi
ng of fixture structure, improve a
nd desig
n i
n later. After the completio
n of the mecha
nical drawi
ng, mecha
nical ma
nufacturi
ng tech
nology fou
ndatio
n, mecha
nical desig
n, mecha
nical e
ngi
neeri
ng materials a
nd so o
n after the desig
n of the
next teachi
ng li
nk. The positio
ni
ng, clampi
ng, process route arra
ngeme
nt a
nd process dime
nsio
n determi
natio
n of a part are correctly solved, a
nd a special fixture is desig
ned to e
nsure the machi
ni
ng quality of the parts. The desig
n should also cultivate their ow
n ability of self-study a
nd i
n
novatio
n. Therefore, the desig
n is comprehe
nsive a
nd practical, i
nvolvi
ng awide ra
nge of k
nowledge. So i
n the desig
n,we should pay atte
ntio
n to the basic co
ncepts, basic theory, a
nd pay atte
ntio
n to the
needs of productio
n practice. O
nly by combi
ni
ngvarious theorieswith productio
n practice, ca
nwe complete the desig
nwell. Keywords: e
nd drive shell tech
nology; process specificatio
n; fixture desig
n; cutti
ng parameters; positio
ni
ng error 目录 摘要I Abstract II 第一章绪论1 1.1引言1 1.2研究内容1 1.3机械加工工艺规程2 1.4机械加工工艺规程的设计原则2 1.5机床夹具的工作原理及设计步骤2 1.5.1机床夹具的工作原理2 1.5.2机床夹具的设计步骤2 第2章工艺规程设计4 2.1毛坯的制造形式4 2.2零件分析4 2.3基面的选择4 2.3.1粗基准的选择5 2.3.2精基准的选择5 2.4制定工艺路线5 2.5机械加工余量的确定6 2.6确定切削用量及基本工时8 第3章末端传动壳体夹具设计22 3.1问题的提出22 3.2定位基准的选择22 3.3切削力和夹紧力的计算22 3.4定位误差分析23 3.5定位键与对刀块24 3.6夹具定位原理25 总结26