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아연도금 방청 강판 용접속도에 따른 기공 품질 영향도 연구
정홍래(Hongrae Chung),최돈현(Donhyun Choi),오상훈(Sanghoon Oh),차승환(Seonghwan Cha),손준형(Joonhyung Son) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
This paper introduce how welding speed affects the blowhole quality of galvanized steel weld bead. Welding is a functional part that connects each metal panels and endure stimulus from the tire wheel. Weld Strength & Durability is the most important performance for the stability of the suspension vehicle and blowhole effects on Weld Strength & Durability critically. In this paper, blowhole quality is compared according to the weld speed and based on the results, we proposed the optimal weld speed.
정홍래(Hongrae Chung),최돈현(Donhyun Choi),오상훈(Sanghoon Oh),차승환(Seonghwan Cha),손준형(Joonhyung Son) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
This paper introduce how the welding bead end type affects the strength and durability of product. Welding is a functional part that connects each metal panels and endure stimulus from the tire wheel. Weld Strengh & Durability is the most important performance for the stability of the suspension vehicle. In this paper, weld strength & durability are compared according to the welding end type and based on the results, we proposed the optimal welding end type.
T-joint 필렛 용접 하중 및 용접부 갭에 따른 피로 특성 연구
안희태(Heetae Ahn),채홍윤(Hongyun Chae),최돈현(Donhyun Choi),김성겸(Sunggyum Kim) 한국자동차공학회 2022 한국자동차공학회 부문종합 학술대회 Vol.2022 No.6
Welding is widely used in the automobile industry, but suspension parts are exposed to various load conditions and are vulnerable to fatigue damage in the welding part. Durability problems occur in areas where gas metal arc welding of subframes and arms is applied. In this study, the fatigue characteristics according to the load direction were analyzed through specimen tests for the T-joint fillet welding structure where welding cracks usually occur, and the fatigue limit according to the gap of the welding part was compared. For each load, the fatigue limit load was compared 300,000 cycles times for each condition of the welding part gap 0, 0.5mm. 1.0mm in the load direction in the tensile, shear, and ± bending directions. Through this, when designing suspension parts, a method for robust design depending on the load direction was identified, and in T-fillet welding, the penetration of the root part had a significant effect on the fatigue durability of the welding part.
T-joint 필렛 용접 형상 및 하중 방향에 따른 피로 특성 연구
안희태(Heetae Ahn),채홍윤(Hongyun Chae),최돈현(Donhyun Choi),오창영(Chang-Young Oh),이진호(Jin-Ho Lee) 한국자동차공학회 2023 한국자동차공학회 부문종합 학술대회 Vol.2023 No.5
Welding is widely used in the automobile industry, but suspension parts are exposed to various load conditions and are vulnerable to fatigue damage in the welding part. Durability problems occur in areas where gas metal arc welding of subframes and arms is applied. In this study, the fatigue characteristics depending on the shape of weld and the load direction were analyzed through specimen tests for the T-joint fillet welding structure. The fatigue limit load was compared 300,000 cycles times for each load condition of the welding part in the tensile, shear, and ± bending directions. A method for robust design depending on the load direction designing suspension parts was identified. And the durability of the double-sided welding in T-fillet joints was compared with the single-sided welding.