摘要 本文是有关偏心轴工艺步骤的说明和机床夹具设计方法的具体阐述。工艺设计是在学习机械制造技术工艺学及机床夹具设计后，在生产实习的基础上，综合运用所学相关知识对零件进行加工工艺规程的设计和机床夹具的设计，根据零件加工要求制定出可行的工艺路线和合理的夹具方案，以确保零件的加工质量。 据资料所示,偏心轴一般是通过偏心孔固定在电机旋转轴上，在电机启动时，做凸轮运动。因此广泛应用于汽车、发动机、泵等。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。 关键词：机械加工、工艺规程、专用夹具、偏心轴，加工铣齿面 Abstract This paper is the descriptio
n of the process steps of the ecce
ntric shaft a
nd the desig
n method of the fixture. The process desig
n is based o
n the productio
n practice after lear
ni
ng the tech
nology of mecha
nical ma
nufacturi
ng tech
nology a
nd the desig
n of machi
ne tool fixture, a
nd o
n the basis of the productio
n practice, the desig
n of the machi
ni
ng process specificatio
n of the parts a
nd the desig
n of the fixture of the machi
ne tool are combi
ned, a
nd the feasible process route a
nd reaso
nable fixture scheme are formulated accordi
ng to the processi
ng requireme
nts of the parts, so as to e
nsure the processi
ng quality of the parts. Accordi
ng to the data, the ecce
ntric shaft is usually fixed o
n the rotati
ng shaft of the motor through the ecce
ntric hole, a
nd the cam motio
n is do
ne whe
n the motor is started. Therefore, it is widely used i
n cars, e
ngi
nes, pumps a
nd so o
n. I
n the process of desig
ni
ng ecce
ntric shaft machi
ni
ng process, the total margi
n a
nd tolera
nce of each surface should be accurately determi
ned by looki
ng up the table method, a
nd the machi
ni
ng equipme
nt of machi
ne tool a
nd the correspo
ndi
ng machi
ni
ng tool, feed qua
ntity, cutti
ng speed, power, torque a
nd so o
n should be selected reaso
nably to improve the machi
ni
ng accuracy a
nd e
nsure its machi
ni
ng quality. Key words: machi
ni
ng, process pla
n
ni
ng, special fixture, ecce
ntric shaft, machi
ni
ng a
nd milli
ng tooth surface 目录 1.零件的分析----------------------------------------------5 1.1零件的作用---------------------------------------5 1.2零件的工艺分析-----------------------------------5 2.确定生产类型--------------------------------------------6 3.确定毛坯------------------------------------------------6 3.1确定毛坯的材料-----------------------------------6 3.2确定毛坯的加工余量-------------------------------6 4.工艺规程设计--------------------------------------------7 4.1偏心轴加工定位基准的选择-------------------------7 4.1.1粗基准的选择-----------------------------7 4.1.2精基准的选择-----------------------------7 4.2制定工艺路线-------------------------------------8 4.3确定工序尺寸-------------------------------------9 4.3.1端面的加工余量---------------------------9 4.3.2铣平面的加工余量------------------------10 5.切削用量、时间定额的计算--------------------------------10 6.夹具设计-----------------------------------------------23 6.1设计要求----------------------------------------23 6.2夹具设计----------------------------------------23 6.2.1定位的选择----------------------------23 6.2.2切削力的计算与夹紧力分析----------------23 6.2.3定位误差--------------------------------25 6.2.4装配图----------------------------------25