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CAE를 이용한 도어트림 사출 성형 최적 설계를 위한 프로세스 개발
장익근(Ikkun Jang),전오환(Ohhwan Jeon),최해석(Haeseok Choi),이상준(Sangjun Lee) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
An injection molding optimization process development which uses the computer was desired to reduce a mold trial manufactures repetition work from the trial mistake and loss cost according to product development delay in the product development stage. The result of the CAE(Computer Aided Engineering) can not forecast the result of actual injection molding and can appear as a result entirely different from the result of actual injection molding. We enhanced CAE reliability to reduce the difference between actual injection molding and computer simulation injection molding in this research. We made necessary document for a work procedure not to apply in existing method. The work progressed in order according to the work procedure. We applied DFSS(Design For Six Sigma) technique and progressed this research for optimization design of door trim injection molding. We set up a work process, enhanced the reliability of the computer simulation injection molding and optimized the door trim injection molding condition to the result of this research.
자동차 Door Trim에 적용되는 폴딩포켓 Effort에 관한 연구
지철욱(Chulwook Ji),전오환(Ohhwan Jeon),권영호(Youngho Kwon),김충윤(Chungyoon Kim),이동현(Donghyun Lee),지성호(Songho Ji) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper shows that the mathematical relation-equation about the generated force when the folding-map - pocket in the door trim in the car body is worked and has an intension of optimal design it. Construction parts of the folding-map-pocket (oil damper, torsion coil spring, rubber damper, pocket weight, hinge) cause forces and frictions when the folding-map-pocket is working and relation-equations consider making it. This paper shows verification of the mathematical relation-equation through comparing with the measurement force take advantage of three cars that are GENESIS, GRANDUAR, VERACRUZ.
조현권(Hyunkwon Jo),전오환(OhHwan Jeon),남종현(JongHyun Nam),송병철(ByungChul Song) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Recently the automotive industry has focused on reducing product development time to correspond with the customer’s demands quickly changed. The decreased product development time shortens the quality assurance period which makes it difficult to guarantee the quality of product. Therefore the conflict between development time and quality assurance occurs that customer’s expect actually higher quality is higher than in the past. To solve this problem, many automotive companies have tried to forge a system that verifies the various steps of development in advance. In many case the larger automotive companies have employed a virtual validation system and the Digital Mock-Up (DMU) to help ensure quality control. Domestic car maker era have recognized the importance of virtual validation systems and introduce, build properly and deploy it. But domestic automotive supplier era have a problem with building the system because the software is very expensive, there are few experts, and the system often fails to meet a company’s individual needs. For these reason many suppliers fail to successfully implement quality assurance procedure and just do it formally. In this paper, to approve this problem, we introduce the virtual validation system designed specifically for supplier; build the process and show the case; present the results which show positive effect.
자동차 도어 트림 전면 패드가 스피커에 의한 가진시 승차감에 미치는 영향 연구
지성호(Sungho Ji),박현민(Hyunmin Park),전오환(Ohhwan Jeon),김병훈(byunhoon Kim),이현철(Hyunchul Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The abroad advance of a domestic car increased and A domestic car export is increasing in America market. The sale of the car have been commanded greatly owing to J.D. Power and Associates conducted independent surveys of customer satisfaction A domestic car is true satisfying result in IQS. A Vibration of Doortrim was increased by the speaker compared with former time. The relation is determined with the Door module of the car to the reason. The car to be produced recently is closed completely the outside pannel with the inside pannel of the door because of Sealed module preventing of rainwater and improving of aucoustic. furtermore, An Ansorption pad for door trim exised between insied and outsied was unnecessary. but, by reason of terrivle vibration of the door speaker, We analyzed a vibration problem which brings Sealed Module that has the problem common We analyzed whether the trim-pad covered the whole inside of the doortrim gave the vibration any influence.
차량 도어 시스템의 FEM-EMA Correlation 연구
최재민(Jaemin Choi),전인기(Inki Jun),조미희(Mihee Cho),전오환(Ohhwan Jeon),지성호(Sungho Ji) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The object of this paper is to develop the application method of FEM-EMA correlation and validation techniques to automotive door system for evaluating the vibration effect of door speaker. Recently the door assembly has inner module panel and powerful speaker system to raise their capacity as that result the vibration problem occurred to the door trim. A FE modal analysis and a multi-point experimental modal analysis (EMA) of door assembly are compared with a classical comparing method, MAC (Model Assurance Criteria). In additional in this paper, modeling technique in the mounting area is considered to update dynamic characteristics of the system. Several linkage method and boundary condition are applied to FE model, finally most effective method is suggested for raising the accuracy of FE model and the corrected FE model is set.