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논문 기본 정보

자료유형
학술저널
저자정보
신석우 (한국생산기술연구원) 이종훈 (가진테크) 박상흡 (공주대학교)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第36卷 第1號
발행연도
2018.2
수록면
82 - 89 (8page)

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Recently, in the automobile industry, it has become necessary to increase the fuel efficiency and the safety regulations to make the vehicle lightweight. Therefore, it is necessary to manufacture the dual phase steel, the complex phase steel, the MS steel, the TRIP steel, and TWIP have been increasingly applied to high strength steel with a tensile strength of 700MPa or more. In order to apply ultra high tensile steel to the body, welding process is essential. Resistance spot welding, which is advantageous in terms of cost, is applied more than 80% in body welding. It is generally known that ultra high tensile strength steel has poor weldability because it increases the alloy element content to improve strength. In the case of resistance spot welding of ultra high tensile steel, it has been reported that the proper welding condition area is reduced and interfacial fracture and partial interfacial fracture occur in the weld zone. In order to overcome such problems, researches on welding quality judgment that can predict the defect and quality in real time are actively conducted. In this study, the dynamic resistance of the weld is monitored using the secondary circuit process variables detected during resistance spot welding, and the factors necessary for welding quality determination are extracted from the dynamic resistance pattern. Using the analyzed factors, a regression model that could estimate weld strength was developed. Two regression equations of model were suggested depending on the factors, and it was showed that the model developed by backward elimination method was effective one for weld quality estimation. Based on this, a regression model that can be applied to the field was suggested.

목차

Abstract
1. 서론
2. 용접실험
3. 로브 곡선
4. 동저항과 예측인자 추출
5. 용접 강도 예측 모델 개발
6. 결론
References

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UCI(KEPA) : I410-ECN-0101-2018-581-001832669