• Journal of Welding and Joining
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• v.19 no.3
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• pp.255-260
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• 2001

• Journal of Welding and Joining
• /
• v.16 no.2
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• pp.29-36
• /
• 1998

• NEWSLETTER 전기공업
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• no.91-21 s.34
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• pp.1-15
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• 1991

• Journal of Welding and Joining
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• v.29 no.6
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• pp.26-32
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• 2011

• Journal of the korean Society of Automotive Engineers
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• v.11 no.2
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• pp.13-17
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• 1989

전기저항을 이용하여 두께가 1-7mm(0.03-0.27in)의 얇은 구조물을 국부적으로 융착시켜 접합하는 점용접은 자동차 및 항공기 부품산업에 활용도가 높아지고 있다. 구조물 접합시 점 용접은 너깃 주위의 열영향부에 잔류응력이 발생하므로 정적강도와 피로강도를 저하시키려는 원인이 되고 있다. 따라서 강도의 저하를 방지하기 위하여 용접시간, 용접전류량, 용접 가압력 등에 대한 최적 용접조건을 설정하기 위한 연구가 많이 진행중에 있다.

• Proceedings of the KWS Conference
• /
• 2006.10a
• /
• pp.262-264
• /
• 2006

• Proceedings of the KWS Conference
• /
• 2004.05a
• /
• pp.30-32
• /
• 2004

최근 자동차 산업에서 추구하고 있는 경량 차체 제조와 경량 구조의 건축 판재, 전자 제품 외판재의 필요가 대두됨에 따라 초경량, 고비강성/고비강도 구조재에 대한 연구가 다각도로 진행되고 있으며, 현재 급속도로 적용 영역이 확대되고있다. (중략)

• ICROS
• /
• v.2 no.6
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• pp.38-49
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• 1996

본 논문에서는 시각 인식 기술을 이용한 자동화된 생산기술 분야로, 전자회로 기판 생산 공정과 용접 공정을 예롤 들었으며, 각 분야에서의 연구 동기 및 현황을 소개하고 최근 사용되고 있는 기술에 대해 논하였다. 여기서, 전자회로 기판 생산공정에 적용된 시각 인식 기술로는 인쇄 회로 기판(PCB)의 도체 패턴의 양/불량 판정 검사, FIC부품의 인식 및 리드 검사, FIC부품의 장착상태검사, 장착 후의 납땜 검사 등을 다루었으며, 용접 공정에 대한 기술로는 맞대기 용접에서의 용접선 추적, 고주파 전기저항 용접으로 생산되는 강관의 용접품질 검사 등을 다루었다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.3
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• pp.52-60
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• 2018

In the automobile industry, in order to increase the fuel efficiency and conform to the safety regulations, it is necessary to make the vehicles as light as possible. Therefore, it is crucial to manufacture dual phase steels, complex phases steels, MS steels, TRIP steels, and TWIP from high strength steels with a tensile strength of 700Mpa or more. In order to apply ultra-high tensile strength steel to the body, the welding process is essential. Resistance spot welding, which is advantageous in terms of its cost, is used in more than 80% of cases in body welding. It is generally accepted that ultra-high tensile strength steel has poor weldability, because its alloy element content is increased to improve its strength. In the case of the 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. Therefore, research into the welding quality judgment that can predict the defect and quality in real time is being actively conducted. In this study, the dynamic resistance of the weld was monitored using the secondary circuit process variables detected during resistance spot welding, and the factors necessary for the determination of the welding quality were extracted from the dynamic resistance pattern. The correlations between the extracted factors and the weld quality were analyzed and a regression analysis was carried out using highly correlated pendulums. Based on this research, a regression model that can be applied to the field was proposed.

• Proceedings of the KWS Conference
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• 2000.10a
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• pp.201-203
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• 2000

In this study, effect of welding parameters on the defect density in the weldments produced by high frequency electric resistance welding process. The defect density measured by X-ray radiography showed a W-type curve as a function of heat input rate. The mechanisms of the such behavior were discussed based on the chemical compositions of the oxides formed at the weldments.