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

Lee, Min-Koo; Kwag, Hyo-Chang

Journal of Korean Society for Quality Management > Volume 33(1); 2005 > Article

Journal of Korean Society for Quality Management 2005;33(1): 88-.

스폿 용접공정의 TIP 수명 향상을 위한 6시그마 프로젝트 사례

이민구¹, 곽효창²

¹충남대학교 정보통계학과
²(주)카테크 기술연구소

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

Min-Koo Lee¹, Hyo-Chang Kwag²

¹Department of Information and Statistics, Chungnam National Univeristy
²R&D Center, Kartek Co. Ltd.

ABSTRACT

This paper considers 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 vital few input variables are jointly obtained by maximizing TIP life time using DOE and alternative selection method.

Key Words: Six Sigma;TIP Life Time;Spot Welding;