To investigate the relationship of cutting variables to cutting force.
Table 1
Equations from the Class Notes were used for the calculations.
Calculating the HPu values is done by setting c=1 at a feed rate of .012 in/rev.. When interpolating the data gathered in lab the experimental HPu value for aluminum is .313 HP/(in^3/rev) which is very close to the expected value of .3 HP/(in^3/rev). From here the values of the correction factor “c” were calculated Ref Table 2. Values for "c"were off by 21% which could be related to the noise in the dyno readings.
Table 2
Chart 1
Chart 2
To investigate the relationships of the cutting variables and surface roughness.
The depth of the cut was 0.015" for the brass and steel.
The larger the tool radius the smoother the surface finish. As with most machine tool applications this relationship is only true to a point.
The overall surface roughness for the brass was smoother then that of the steel.