Journal of Korean Society for Quality Management (품질경영학회지)

Korean Society for Quality Management (한국품질경영학회)
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A Study on the Improvement of Spot Welding Quality of Wire Cu Alloy by Taguchi Method for Dynamic Characteristics

동특성 다구찌 기법을 통한 Cu합금 와이어의 스폿용접 품질향상 연구

  • Suk, Ho-sam (Graduate School of Industrial Management Engineering, Kyonggi University) ;
  • Kim, Yeun-sung (Graduate School of Industrial Management Engineering, Kyonggi University) ;
  • Yoo, Choon-burn (Dept. of Industrial Management Engineering, Kyonggi University)
  • 석호삼 (경기대학교 대학원 산업경영공학과) ;
  • 김연성 (경기대학교 대학원 산업경영공학과) ;
  • 유춘번 (경기대학교 산업경영공학과)
  • Received : 2017.12.05
  • Accepted : 2017.12.11
  • Published : 2017.12.31
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Abstract

Purpose: The purpose of this study is to find the optimum working conditions for spot welding of wire Cu alloys to achieve high-level quality. The parts subject to spot welding are brush card assemblies, which are the main module of the electric movement method of the car seat. Methods: In this study, the signal-to-noise ratio(SN ratio) and the loss function [L(y)] are used as Taguchi method for dynamic characteristics. Results: The results of the study are as follows. First, the analysis of variance using SN ratio showed 6 significant factors(p = 0.1% or less) among 7 factors except press force. Second, the optimal design of the dynamic characteristics is the tip exchange cycle: 50,000 ea., the welding time is 110 ms, the pressing force is 11 kgf/cm2, the rise time is 40 ms, and the tip dressing is 3,000 ea., Tip angle is 12o and electric current is 1,800 A. Conclusion: The validity of the spot welding process of the manufacturer's brush card assembly was verified and proved to be consistent with the study results. The results of this study are expected to standardize the welding conditions and guarantee the quality level required by the customers.

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References

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