机械5

摘要 夹具设计对每一个理工科学生而言都是必不可少的，夹具的设计和研究为今后的学生和工作将提供很大的帮助。 本文设计的任务是右支架座零件的加工工艺分析及其扩2-Ф43.5孔的夹具设计。在充分了解零件的结构后，对其毛坯尺寸、制造类型、基准、加工的工艺路线进行了确定；然后依据设计的加工工艺路线，对每一个工序进行计算。 本次设计扩2-Ф43.5孔专用钻床夹具，在减少停机时间的同时，还提高生产效率。在进行该专用夹具设计的时候，首先应该是建立在对零件的工艺进行分析、选择粗精基准、进行必要计算的基础上，对所要加工的工序做好定位基准的选择，对夹具中的切削力及夹紧力做出计算。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。 关键词：右支架座；夹具设计；工艺路线；定位基准；切削力 Abstract Fixture desig
n is i
ndispe
nsable for every scie
nce a
nd e
ngi
neeri
ng stude
nt. Fixture desig
n a
nd researchwill provide great help for future stude
nts a
ndwork. The task of this paper is to a
nalyze the processi
ng tech
nology of the right bracket seat parts a
nd to desig
n the fixture for expa
ndi
ng 2-Ф43.5 holes. After fully u
ndersta
ndi
ng the structure of the parts, the bla
nk size, ma
nufacturi
ng type, be
nchmark a
nd processi
ng route are determi
ned, a
nd the
n each process is calculated accordi
ng to the desig
ned processi
ng route. This desig
n expa
nds 2-Ф43.5 hole special drilli
ng fixture, reduces dow
ntime, but also improves productio
n efficie
ncy. I
n the desig
n of the special fixture, first of all, it should be based o
n the a
nalysis of the process of the parts, the selectio
n of rough a
nd precise be
nchmarks a
nd the
necessary calculatio
n, the selectio
n of positio
ni
ng be
nchmarks for the processi
ng procedures, a
nd the calculatio
n of the cutti
ng force a
nd clampi
ng force i
n the fixture. Calculate the positio
ni
ng errorwhe
n fixture is positio
ned, a
nalyze the ratio
nality a
nd shortcomi
ngs of fixture structure, a
nd pay atte
ntio
n to improveme
nt i
n future desig
n. Keywords: right support base; fixture desig
n; process route; positio
ni
ng datum; cutti
ng force 目录 摘要I Abstract II 第1章引言1 2.2零件分析2 2.3基面的选择2 2.3.1粗基准的选择原则3 2.3.2精基准选择的原则3 2.4制定工艺路线4 2.5确定各工序的加工余量、计算工序尺寸及公差5 2.6确定切削用量及基本工时6 第3章右支架的夹具设计17 3.1定位基准的选择17 3.2切削力及夹紧力的计算17 3.3误差分析18 3.1.1定位误差18 3.1.2产生定位误差的原因18 3.3.3定位误差计算19 3.4机床夹具的总体形式19 3.4.1确定夹具体20 3.4.2绘制夹具非标零件图21 3.4.3绘制夹具装配图23 总结26 致谢27 参考文献28