It is known that surface characteristics play an important role in the
durability and function of any mechanical components. Roundness is a
very important surface characteristic that can affect on the performance
and behavior of machined parts.
This paper introduces theoretical and experimental investigations on the
effect of some turning parameters on roundness error of turned specimens.
For the study, the turning parameters such as cutting speed, feed and depth
of cut were chosen. Mild steel specimens are used for the experimental
investigations. The output parameters for two different types of chucking
(3-jaw chucking and 4-jaw chucking) are also observed and analyzed. The
relationship between the input parameters and the output parameters is
presented in this paper.
The results of the investigation clearly indicate that, feed, depth of cut,
and cutting speed are interrelated and have significant effects on
roundness error, but feed rate and depth of cut have the most significant
effects. Also the results indicate that the chucking method along with
machining conditions considerably influences the roundness error of the
machined workpiece as a 4-jaw chuck gives better results of roundness
than a 3-jaws chuck. Also machining near the tailstock gives better
roundness than the headstock irrespective of the chucking system used.