机械5

摘要 经过两年多对机械知识的学习，基于自己所学的机械设计、机械制图等课程，本人对支架加工工艺及加工过程中钻铣所用到的夹具进行设计，其中包括公差配合、切削机床等多方面相关知识。 本设计主要对支架工艺规程铣底面和宽24键槽的夹具进行设计。本人将整个设计过程分为三部分:第一本分对零件加工工艺设计；第二部分对零件加工工序进行设计；第三部分是对专用夹具进行设计。在整个设计工程中，对零件分析并选定加工基准，了解其结构是第一步，然后设计出工艺路线。下一步，对零件各个尺寸进行精确计算，根据计算结果选择切削设备以及切削用量，同样根据计算出的尺寸选出夹具的组成部件，例如与机床连接部件等其他部件；通过计算误差分析设计的可行性。 关键词:切削用量；夹紧；误差 ABSTRCT After more tha
n twoyears of mecha
nical k
nowledge, the course of mecha
nical desig
n, their school of mecha
nical drawi
ng based o
n fixture, drilli
ng a
nd milli
ng used to support my machi
ni
ng process a
nd machi
ni
ng process desig
n, i
ncludi
ng tolera
nces, cutti
ng machi
ne tools a
ndvarious related k
nowledge. This desig
n is mai
nly desig
ned for the bracket process specificatio
n, the milli
ng bottom surface a
nd the 24 key slot jigs. I divide thewhole desig
n process i
nto three parts: the first part is the desig
n of parts processi
ng tech
nology; the seco
nd part is the desig
n of parts processi
ng procedure; the third part is the desig
n of special fixture. I
n thewhole desig
n project, it is the first step to u
ndersta
nd the structure of the parts a
nd select the processi
ng datum, a
nd the
n the process is desig
ned. Next, o
n the part of each size accurately calculated accordi
ng to the calculatio
n results, selectio
n of cutti
ng equipme
nt a
nd cutti
ng parameters, the same accordi
ng to the calculated size of selected parts of the fixture, such as machi
ne co
n
necti
ng parts a
nd other compo
ne
nts; through the calculatio
n a
nd a
nalysis of feasible desig
n error. Keywords: cutti
ng amou
nt; clampi
ng; error 目录 摘要I ABSTRCT II 第1章绪论1 第2章零件的分析2 2.1零件的作用2 2.2零件的工艺分析2 第3章工艺规程设计4 3.1确定毛坯的制造形式4 3.2基面的选择的选择4 3.3精基准的选择5 3.4制定工艺路线5 3.5机械加工余量、工序尺寸、毛坯尺寸的确定7 3.6确定切削用量及基本工时7 第4章铣夹具设计11 4.1问题的提出11 4.2定位基准的选择11 4.3铣削力的计算11 4.4定位误差分析11 4.5夹具设计及操作的简要说明12 结论15 参考文献16 致谢17