机械5

摘要 本次课程设计主要工作是设计偏心轴的加工工艺规程，特定工序的设计，以及偏心轴专用夹具的设计，以上工作的意义在于熟悉工件的加工过程，并给定该加工过程的方法、使用工具和加工顺序等，通过实际操作，熟悉零件加工过程，并锻炼拥有自主设计的能力，同时也对特定工序进行设计，能够加强对工序的了解和掌握基本设计工序的能力，之后就是偏心轴夹具的设计，设计时需要掌握六点定位原理，首先对偏心轴进行定位，在保证了六个自由度被限制之后要进行加紧装置的设计以及夹紧力的计算，夹具体的设计等等，通过以上过程，可以加深对六点定位原理的认识，以及其他细节性的东西的全方面的了解。 Abstract The mai
n work of this course desig
n is to desig
n the process procedure of ecce
ntric shaft, the desig
n of specific processes, a
nd the desig
n of special fixtures for ecce
ntric shaft. The sig
nifica
nce of the above work is to be familiar with the processi
ng process of the workpiece. A
nd give
n the method of the processi
ng process, the use of tools a
nd the processi
ng order, etc., through the actual operatio
n, familiar with the parts processi
ng process, a
nd exercise the ability to have i
ndepe
nde
nt desig
n, but also to desig
n specific processes, Ca
n stre
ngthe
n the u
ndersta
ndi
ng of the process a
nd master the ability of the basic desig
n process, followed by the desig
n of the ecce
ntric shaft fixture, the desig
n
needs to master the six-poi
nt positio
ni
ng pri
nciple, first of all the ecce
ntric axis positio
ni
ng. After e
nsuri
ng that the six degrees of freedom are limited, the desig
n of the tighte
ni
ng device a
nd the calculatio
n of the clampi
ng force, the specific desig
n, etc., ca
n be carried out. Through the above process, the u
ndersta
ndi
ng of the six-poi
nt positio
ni
ng pri
nciple a
nd other details ca
n be deepe
ned. 目录 1零件的分析1 1.1零件的结构分析1 1.2确定毛坯1 1.2.1毛坯的选择1 1.2.2毛坯加工余量的确定1 1.3零件的工艺过程分析2 1.3.1选择定位基准2 1.3.2制定工艺路线2 1.3.3机械加工余量、工序尺寸及公差的确定3 2专用夹具是设计10 2.1钻φ4孔夹具设计10 2.1.1选取定位基准10 2.1.2自由度的限制10 2.1.3切削力的计算与夹紧力分析11 2.1.4确定夹紧的元件12 2.2定位误差的分析13 2.3夹具装配图13 2.4夹具体图13 3参考资料14