측면충돌을 고려한 자동차 도어트림 팔걸이부 최적 설계

최해석(Haeseok Choi),장익근(Ikkun Jang),구자겸(Jakeum Koo),김선민(Sunmin Kim),김한경(Hankyoung Kim) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11

A nation have the regulation for a vehicle safety and interested in the side impact of a vehicle. But we spend a lot of money and time for the side impact test. So we must design a vehicle parts regard to the side impact test. This paper describes a new test method for side impact test. We used DFSS(Design For Six Sigma) process for design of door trim armrest. We searched the door trim armrest control factor and made the experiment plan. We researched the optimal design factor and improved the abdomen injury value of the human dummy.

도어트림 측면충돌 평가를 위한 목표성능에 대한 고찰

최해석(Haeseok Choi),박현민(Hunmin Park),이현철(Hunchol Lee),장익근(Ikkun Jang),윤영한(Younghan Youn) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5

This research is about a door trim assessment for the passenger safety when it does a side impact. We are research about the method to verify the door trim before the full car side impact test. We have prescribed by the nation at the laws and regulations assessment method the case of a full car side impact test. But an assessment regulation about the door trim only does not exist. We related with full car side impact simulation and studied a goal performance of the door trim. We studied the goal absorption energy and impactor velocity for evaluate a door trim side impact performance. A door trim goal performance which is desired by the vehicle has the difference. We used the energy to happen after a side impact and found the goal absorption energy. We found a impactor velocity of a door trim assessment device from an energy relation. We prepared theoretical key point for a goal performance assessment about every vehicle through this research.

자동차 내장재에 대한 Rapid Prototyping 활용 사례

최해석(Haeseok Choi),장익근(Ikgun Jang),나형현(Hyounghyoun Na) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

To satisfy customer demand which should be getting shorter improvement period for new product and ensure the highest quality, the best need thing is how short time soluble present's problem. Every part has a problem. But we can reduce the trial and error if we have a correct understanding about the problem. So we make the best use of RP(Rapid Prototyping) when we need to examine design solution. We make the parts by using solid data within short time and then can check the design skin, matching, assembly, irrationality of design solution and the important dimension etc. So we can get good quality parts quickly due to reduce time of checking quality initially. Also we can resolve all problems that can happen prior to manufacturing. In this paper, we introduced a control process and efficient application method in an automobile interior parts about RP practical use.

측면충돌을 고려한 자동차 도어트림 팔걸이부 최적 설계

최해석(Haeseok Choi),장익근(Ikkun Jang),구자겸(Jakeum Koo),김선민(Sunmin Kim),김한경(Hankyoung Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

A nation have the regulation for a vehicle safety and interested in the side impact of a vehicle. But we spend a lot of money and time for the side impact test. So we must design a vehicle parts regard to the side impact test. This paper describes a new test method for side impact test. We used DFSS(Design For Six Sigma) process for design of door trim armrest. We searched the door trim armrest control factor and made the experiment plan. We researched the optimal design factor and improved the abdomen injury value of the human dummy.

자동차 도어트림 스피커그릴 평가방법에 대한 연구

최해석(Haeseok Choi),장익근(Ikkun Jang),전오환(Ohhwan Jeon),한경식(Kyoungsik Han),소상우(Sangwoo So),허용정(Yongjung Huh) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2007 No.11

도어트림 단품측정충돌 시험 및 해석 정도향상을 위한 연구

최해석(Haeseok Choi),장익근(Ikkun Jang),이현철(Hunchol Lee),한경희(Kyeonghee Han) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3

We carried out impact test and simulation of door trim in order to enhance simulation accuracy of full vehicle side impact. Each door trim was fixed at rigid wall and an impactor was thrown upon it with initial velocity Plastic material property and assembly structure of door trim were thoroughly investigated to develop an appropriate analysis model. Good correlation was obtained between test and simulation. Full vehicle simulation revealed that the effect of chosen parameters was significant for injury prediction.

충격내구성을 고려한 자동차 도어트림 미세망 스피커그릴 개발

최해석(Haeseok Choi),장익근(Ikkun Jang),김충윤(Chungyoun Kim),권근영(Geunyoung Kwon),한경식(Kyoungsik Han),소상우(Sangwoo So) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10

The object of this research is fineness net speaker grille design and mold development and test analysis specification standardization. We established main design factor that influence in quality for speaker grille of door trim that is required from customer, achieved design optimization, and established manufacture standard, test method and test specification for request quality. We developed process for confirmation about reliability of speaker grille of door trim. We will apply process in new model design project. We apply product that study on deluxe car and will contribute to high-quality improvement. We studied actively about design condition grasping, product design technology acquirement, material application, localization of mold technology about fineness net. Injection molding technology for production, confirmation about reliability and specification and cost down through reduction of process. Result presentation of design condition, mold technology, injection molding technology and confirmation about reliability, etc consisted about fineness net speaker grille that is preceding product. Effects are world competitive power increase as engineering technology and reliability construction test method and standardization process settlement. Plan is world market conquest as apply to high-class automobile and cost down through localization, reduction of process.

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.

열융착 Boss 설계 개선

이현철(Hyunmin Park),박현민(Hyunchul Lee),지성호(Sungho Ji),최해석(Haeseok Choi),장익근(Ikkun Jang) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2

In case for door trim of car interior, it is assembled with plastic molding parts. There are two methods for assembling two parts with boss. The first method is screw assembling. It put together strongly each part, but it is required more cost and man hour. The second method is hot sticking method by automatic machine. This method is helpful for factory automation, and good for cost reduction, but it has disadvantage of force for taking off plastic molding parts. In this paper, it is investigated improving force of taking off assembled parts with using hot sticking method. In case of requiring low bolting force, it is possible to substitute screw method to hot sticking method. But it is need to have the similar force of screw method in taking off two parts. Now, it is studied design parameter of hot sticking boss to find appropriate height of boss head and height of initial boss height with two case, outer diameter 7.5㎜ and 8.0㎜. It is used FEM by LS-DYNA and simple regression analysis by JMP program to achieve them.

다꾸지 실험계획법을 이용한 자동차 내장품 covering shelf 의 형상 설계

박현민(Hyunmin Park),이현철(Hyunchul Lee),지성호(Sungho Ji),최해석(Haeseok Choi),전오환(Ohwhan Jun) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2

In order to improve deflection stiffness of covering shelf in car interior, this presents a DOE optimal design process to find design spec for satisfying car interior spec. Covering shelf is located between rear seat and rear window. It is support the small stuffs such as book, tissue etc., so it is designed to resist deflection. After determination of design variables, numerical simulation is carried out by using DOE which is followed method of Tacushi orthogonal array. As a results of that, statistical analysis of regression is performed. If design space is required for out-boundary of initial level, reliability of regression is lowed so that verification is required. It is very important to decide adequate design parameter and level when DOE is used. This study is shown that DOE method and statistical analysis is good design tool for determine design space and various approach is possible to increase reliability.