SILPAKORN UNIVERSITY SCIENCE AND TECHNOLOGY JOURNAL, Vol 5 (No 2) Special issue from OR-Net 2011 Conference

Parameter Setting for Rod Push Production Process on Multiple Responses : A Case Study in Motorcycle Parts Factory

Erawin Thavorn, Prapaisri Sudasna-na-Ayudthya

Department of Industrial Engineering, Faculty of Engineering Kasetsart University, Bangkok

Department of Industrial Engineering, Faculty of Engineering Kasetsart University, Bangkok


Abstract


The aim of this research is to study appropriate setting of parameters in the production process of Rod Push which affect quality characteristics such as diameter and surface roughness. Cycle time is also considered. The problem was done at a study plant and it was found that the actual process capability index (Cpk) of two quality characteristics was less than the manufacturer’s standard of 1.33. Central composite design was used to examine Rod Push produced by CNC with 5 controllable process factors including three factors from rough-cutting process (spindle speed, feed rate, and depth of cut) and two factors from finish-cutting process (spindle speed and feed rate). The nuisance factor of CNC was cutting tool wear. After collecting all data, the appropriate setting was investigated. The new results indicated that the new condition yielded the better process performance index and shorter cycle time.

Keywords: DOE; Central Composite Design; Rod Push Process; CNC Turning Machine

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