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최해석,송석인,이현철 대한인간공학회 2002 대한인간공학회 학술대회논문집 Vol.- No.-
An object of this study is to find the most comfortable shape model. we decided important seat cushion pad shape factor to seating comfort. We uesd CNC(computer numerical control) machine tools and prepared the test sample. We estimated subjective sensitivity measure and objective the body pressure distribution measure. For the first experiment, we evaluated trust of a result by a statistical techniques. The result is not a significant level. we optimized test frequency and model dimension by design of experiment and we executed the same experiment method as the first experiment. The body pressure distribution is investigated and compared with the subjective evaluation. We investigated a trend analysis and an effect analysis by a factor and found the most comfortable shape model dimension.
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.
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.
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 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.
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.
장민규,김창진,최해석,정영득,Jang, Min-Kyu,Kim, Chang-jin,Choi, Hea-Suck,Jeong, Yeong-Deug 한국금형공학회 2015 한국금형공학회지 Vol.9 No.2
In injection molding, many kinds of defects have occurred because of a characteristic of plastics injection molding. Weld line is one of the defects is formed when separated melt fronts recombine together during the mold filling stage. That is one of problems in injection molding. Weld lines in the appearance of plastics parts can deteriorate visible quality. And most importantly, the local mechanical strength in the weld line area can be significantly weaker. It could be one of the most problems for structural applications. In this study, the mold available two-shot-molding of same polymers have been designed, and a series of experiment about tensile strength in weld line area has been conducted using Taguchi's design of experiment to optimize injection molding conditions decreasing of weld strength and find out a factors affected weld strength in two-shot- molding.
사출 성형에서의 Butt Weld Line에 대한 강도 연구
장민규(M. K. Jang),최해석(H. S. Choi),이호재(H. J. Lee),정영득(Y. D. Jung) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
Weld line is formed when separated melt fronts recombine together during the mold filling stage is one of problems in injection molding. Weld lines on the appearance of plastics parts can deteriorate visible quality. And most importantly, the local mechanical strength in the weld line area can be significantly weaker. It could be one of the most problems for structural applications in the weld line areas. In this study, the mold available two-shot - molding of same polymers have been designed, and a series of experiment about tensile strength in butt?weld - line area has been conducted using Taguchi's DOE(design of experiment) to optimize injection molding conditions decreasing of weld strength and find out a factor affected weld strength in two-shot-molding.