机械5

摘要 此次课程设计包括了偏心轴零件工艺过程的设计和专用夹具设计两个部分，因为此前没有设计夹具的经验我在设计之前在网上查阅了相关资料并参考和借鉴其中的一些经验以此改进我的设计。 此次设计研究的目的就是为了更好的掌握机械制造的大致流程以及具体的设计方法，我的设计方法是因考虑到自己经验不足所以参考专业书籍根据自己的题目加以改进从中汲取经验。我的设计结果满足了夹具定位基本原理和重要计算结果的验证。结论是在设计偏心轴机械加工工艺过程时要通过查表法准确的确定各表面的总余量及余量公差，合理选择机床加工设备以及相应的加工刀具，进给量，切削速度、功率，扭矩等用来提高加工精度，保证其加工质量。根据零件加工要求制定出可行的工艺路线和根据夹具定位误差是否合理选择夹具方案，以确保零件的加工质量。 Abstract This course desig
n i
ncludes two parts: the desig
n of ecce
ntric shaft parts process a
nd the desig
n of special fixture. Because there is
no previous desig
n experie
nce, I co
nsulted releva
nt i
nformatio
n o
nli
ne before the desig
n a
nd referred to some of the experie
nce to improve my desig
n. The purpose of this desig
n study is to better grasp the ge
neral process of mecha
nical ma
nufacturi
ng a
nd specific desig
n methods, my desig
n method is to take i
nto accou
nt their lack of experie
nce, so refere
nce professio
nal books accordi
ng to their ow
n topics to improve a
nd lear
n from experie
nce. My desig
n results meet the basic pri
nciple of fixture positio
ni
ng a
nd the verificatio
n of importa
nt calculatio
n results. The co
nclusio
n is that whe
n desig
ni
ng the machi
ni
ng process of ecce
ntric shaft, the total allowa
nce a
nd allowa
nce tolera
nce of each surface should be accurately determi
ned by looki
ng-up table method, a
nd the processi
ng equipme
nt a
nd correspo
ndi
ng cutti
ng tools, feed, cutti
ng speed, power a
nd torque should be reaso
nably selected to improve the machi
ni
ng accuracy a
nd e
nsure the processi
ng quality. Accordi
ng to the requireme
nt of parts processi
ng, the feasible tech
nological route a
nd reaso
nable fixture scheme are worked out to e
nsure the quality of parts processi
ng. 目录 一摘要 二偏心轴零件工艺过程的设计1 2.1零件的分析1 2.1.1零件的作用1 2.1.2零件的工艺分析1 2.2确定毛坯制造形式2 2.3基准的选择2 2.4工艺规程的设计2 2.4.1制定工艺路线2 2.5机械加工余量、工序尺寸及公差的确定5 2.6确定切削用量7 三专用夹具设计13 3.1钻φ10孔夹具设计13 3.1.1选取定位的基准13 3.1.2切削力的计算与夹紧力分析13 3.1.3确定夹紧的元件14 3.1.4专用钻夹具的定位误差14 3.1.5专用夹具的使用简单说明14 3.2夹具零件图及装配图15 四参考文献17