Process Capability in Turning of Carbon Steel

Process capability is a statistical concept used in engineering and quality management to assess and record a process's performance in comparison to its specifications. This paper aimed to better understanding the process capability through turning operation. The end objective of this experiment is to test if the process falls within the range of specification limits. Inputs including variety range spindle speed, fixed depth of cut, and fixed length of cut have been chosen for this study. Spindle speed of 52, 330, 650, 950, and 1350 rpm was chosen to be used in this study. Depth of cut and length of cut were 0.4 mm and 15 mm, respectively. Diameter, as the output was calculated to obtain process capability index. Stability sand normality tests were carried out before obtaining capability index. Capability index for both machines was in range of required limits. However, more inputs may be added to further grasp the knowledge of process capability.