Statistical Study of Factors Influencing Surface Roughness of Machined Work-piece Using Split-Split Plot Design

Abstract

Profound concern had been expressed in the past on the crafting of
apposite experimental-design that can facilitate the simultaneous study of
the individual and conjunctive effects of several experimental treatments
incorporated in one experimental setting. This work has triumphed over
this perceived difficulty by adopting the split-split plot experimentaldesign to the study of four treatments namely: work piece material, spindle speed, tool type and tool angle, all taken at different factor levels.
Our experimental results suggest that tooling and spindle speed are
critical factors that determine the degree of surface integrity of a
machined work piece. The author believes that the results proposed could
be useful, helpful and insightful to Machinist, Production Engineers,
Quality Engineers and Meteorologists in understanding the dynamics of
interplay of these factors with regard to the quality of surface finish of
machined work piece.