A Case Study Six Sigma Project for Improving TIP Life Time in a Spot Welding Process

스폿 용접공정의 TIP 수명 향상을 위한 6시그마 프로젝트 사례

This paper consider a six sigma project for improving the TIP life time in a spot welding process. The project follows a disciplined process of five phases: define, measure, analyze, improve, and control. A process map is used to identify process input and output variables. Nine key process input variables are selected by using C&E matrix and FMEA, and finally four vital few input variables are selected from analyze phase. The optimum process conditions of the four vital few input variables are jointly obtained by maximizing TIP life time using DOE.