Electro-deposition painting process improvement of cab truck by Six Sigma concept

5th International Conference on Manufacturing, Optimization, Industrial and Material Engineering

Kawitu, Kitiya^1 ; Chutima, Parames^1,2

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

10330, Thailand^1

Regional Centre for Manufacturing Systems Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok

10330, Thailand^2

关键词: New parameters;    Process capabilities;    Process Improvement;    Rework costs;    Truck cabs;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/215/1/012007/pdf
DOI  :  10.1088/1757-899X/215/1/012007

来源: IOP

【 摘 要 】

The case study company is a manufacturer of trucks and currently facing a high rework cost due to the thickness of the electro-deposited paint (EDP) of the truck cab is lower than standard. In addition, the process capability is very low. The Six Sigma concept consisting of 5 phases (DMAIC) is applied to determine new parameter settings for each significant controllable factor. After the improvement, EDP thickness of the truck cab increases from 17.88μ to 20μ (i.e. standard = 20 ± 3μ). Moreover, the process capability indexes (Cp and Cpk) are increased from 0.9 to 1.43, and from 0.27 to 1.43, respectively. This improvement could save the rework cost about 1.6M THB per year.