EFFECT OF CUTTING PARAMETERS ON THE SURFACE ROUGHNESS AND ROUNDNESS ERROR WHEN TURNING THE INTERRUPTED SURFACE OF 40X STEEL USING HSS-TiN INSERT

Abstract

This paper presents a research on investigating the effect of cutting parameters on the surface roughness (Ra) and roundness error (RE) when turning the interrupted surface of 40X steel. The TiN coated high speed steel (HSS-TiN) inserts were used in this research. The cutting parameters include cutting velocity, feed rate, and depth of cut. The Box-Behnken method was applied to develop an experimental matrix with fifteen experiments. The influences of cutting parameters on Ra and RE were found using Pareto chart. Two equations that presented the relationship between Ra, RE and cutting parameters were established. These two equations were used to predict Ra and RE. Genetic algorithm (GA) was also used to determine the optimal values of cutting parameters to simultaneously ensure the minimum values of Ra and RE. The further works of this study was also mentioned in this paper.

Keywords

• interrupted surface
• turning
• 40x steel
• hss-tin
• surface roughness
• roundness error
• ga