Process capability improvement through DMAIC for aluminum alloy wheel machining

Journal of Industrial Engineering International

دوره 14، شماره 2، شهریور 2018   

نویسندگان

G. V. S . S. Sharma^{* 1}؛ P. Srinivasa Rao²؛ B. Surendra Babu³

¹Department of Mechanical Engineering, GMR Institute of Technology, Rajam, A.P., 532127, India

²Department of Mechanical Engineering, Centurion University, Parlakhemundi, Odisha, 761211, India

³Department of Industrial Engineering, GITAM University, Visakhapatnam, A.P., 530045, India

چکیده

This paper first enlists the generic problems of alloy wheel machining and subsequently details on the process improvement of the identified critical-to-quality machining characteristic of A356 aluminum alloy wheel machining process. The causal factors are traced using the Ishikawa diagram and prioritization of corrective actions is done through process failure modes and effects analysis. Process monitoring charts are employed for improving the process capability index of the process, at the industrial benchmark of four sigma level, which is equal to the value of 1.33. The procedure adopted for improving the process capability levels is the define-measure-analyze-improve-control (DMAIC) approach. By following the DMAIC approach, the C p, C pk and C pm showed signs of improvement from an initial value of 0.66, −0.24 and 0.27, to a final value of 4.19, 3.24 and 1.41, respectively.

کلیدواژه‌ها

Alloy wheel . CTQ (critical؛ to؛ quality) characteristic . DMAIC (define؛ measure؛ analyze؛ improvecontrol) . Ishikawa diagram . PFMEA (process failure modes and effects analysis) . Control charts