• Journal of Welding and Joining
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• 제20권3호
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• pp.46-53
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• 2002

The expolitation of substitute material and new manufacturing technology of the automobile body panel for next generation cars have been steadily professed by advanced automobile companies. High strength steel of TRIP (Transformation of Induced Plasticity) type is developed in response to demands about crash safety and high strength of automobile. In this study, basic technologies can fix up problems occurring on the mass production and applied to the other forming methods will be prepared through rasping a property of TRIP material.

• International Journal of Aerospace System Engineering
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• 제3권1호
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• pp.21-24
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• 2016

In this study, a optimal design on the hood automotive using eco-friendly natural fiber composites is performed. The hood of an automobile is determined by dividing the Inner panel shape through optimization phase to outer panel and inner panel. It was performed to optimize the size of the thickness of the inner panel and the outer panel by applying a flax/epoxy composite materials. The optimized shape was evaluated for weight-lightening, stability and the pedestrian collision safety. Through the resin flow analysis are confirmed to molding possibility judgment of product.

• 한국자동차공학회논문집
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• 제2권5호
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• pp.74-84
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• 1994

This paper discusses a method to generate the tool path for NC machining of automobile panel dies. The source data representing a panel die may be generated from digitizing machines, other CAD/CAM systems via IGES files, of compound surface models. From the source data, three types of interferencefree tool paths are generated automatically ; a parallel (Cartesian), an isometric, and a pencil cutting tool path. For the interference-free tool path, a polyhedral model composed of several triangles, and an 'offset triangle' approach are exploited. Finally, some practical examples are illustrated.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2002년도 금형가공 심포지엄
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• pp.148-153
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• 2002

Spring back is the typical deformation of pressing process. This phenomenon much affects productivity and especially Incurs the unexpected result of assembling process. We have been searching for the various of the spring back to minimize spring back effect, because it is inevitable.

• 한국생산제조학회지
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• 제7권3호
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• pp.85-91
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• 1998

In this paper an assessment has been proceeded about component technology that stamping car panel can be designed and manufactured efficiently. Also this study investigate standard model of CAD/CAM system in production process of automobile dies, Recently, motor companies are doing their best to increase productivity and to reduce production time. So to develop user-friendly and effective standard model of CAD/CAM system is very important. The cbtained results will lead to the reductions in lead time and man-hour required for the design and manufacture of the automobile dies.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2007년도 춘계학술대회 논문집
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• pp.149-150
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• 2007

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2003년도 제4회 박판성형 심포지엄
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• pp.3-10
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• 2003

Springback after draw and flange is the critical factor affecting the product quality. It is very difficult to predict the amount of springback not only because of complex geometry and material characteristics of the stamping product, but because the methodology has not been established. In this study, springback mechanism is introduced, and experimental tryout an automobile panel is carried out for die design of automotive hood panel. Further, introduce adapting design and field springback was verified by trial experimental with the measured tryout result. Finally, introduced about general method in order to predict springback in computer simulation.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 추계학술대회 논문집
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• pp.629-632
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• 1995

The formability of an automobile body panel is very important. So, we performed an annealing condition change for the development of annealing condition with temperature, atmospheric gas and the annealing cycle. Formability was changed under the influenced of the mechanical properties of steel sheet for the automobile body panel. Therefore, ot os important in the BAF(Batch annealing furnace) annealing process. Because mechanical properties were decided on the heat treatment method of the coil. So, we tested the development of mechanical properties according to the heat treatment method at the annealing furnace using the Ax atmospheric gas and the HNx atmospheric gas. As a result of several investigations, we confirmed the following characteristics ; mechanical properties change under the influence of the annealing cycle and atmospheric gas.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2004년도 제5회 압연심포지엄 신 시장 개척을 위한 압연기술
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• pp.37-44
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• 2004

Automotive company has been endeavoring to develop high strength steels to get higher fuel efficiency of car since the oil shortage in 1970s and to cope with the recent strict environmental regulation. Outer panels(Hood, Roof, Door and Fender) for automobile require higher dent resistance. Bake-hardenable(BH) steels are known as useful for their high deep drawability and high dent resistance. Recently BH steels are increasingly adapted for outer panel use due to their high drawability and high dent resistance. In this study effect of temper rolling on formability (textures, r value) and bake hardenability is investigated fur improving characteristic of bake-hardenable steels.

• Composites Research
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• 제28권5호
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• pp.291-296
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• 2015

본 연구에서는 자동차 구조물의 경량화를 위해 자연섬유 복합재료를 적용하여 차량용 패널의 구조 설계 및 해석을 수행하였다. 구조 설계를 위해 Flax/vinyl ester 복합재료를 적용하였다. 섬유 복합재 패널의 제조공법은 VARTML(Vacuum Assisted Resin Transfer Molding-Light) 제조공법이 적용되었다. 구조 설계 후 충돌에 의한 구조물의 안전성을 분석하기 위해 충돌 실험을 수행하였다. 충돌 실험은 유럽 보행자 보호 기준에 맞게 수행하였으며 해석 결과를 검증하기 위하여 시편을 제작해 충격 실험을 수행하였다. 또한 충격 손상 후 구조물의 잔류강도를 측정하기 위해 손상을 가한 시편의 압축강도 실험을 수행하였다.