• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.4
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• pp.1982-1987
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• 2011

In this study, we proposed a new method that can estimate viscosity curves of unknown samples or high viscous resins like LFT(Long Fiber Thermoplastics). First, we built the system that could detect the pressure of melt during filling the cavity in a mold. It consists of both pressure sensors which are installed in a mold and the Kit which can convert analog signal to digital signal. The kit measures the melt pressure in mold cavity. We could also simulate the cavity pressure during filling process with commercialized CAE softwares(ex, Moldflow). If the viscosity data in CAE Database were correct, the simulated pressure profile coincided with the measured one. According to our proposed algorithm, we obtained correct viscosity data by iterating the process of comparing the simulated profile with the measured one until both coincided each other. In order to verify this algorithm, we selected well-defined PP resin and concluded that the experimental profile comply with the CAE profile. We could also estimate the optimized viscosity curves for PP-LFT by applying our method.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.6
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• pp.1726-1732
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• 2008

Injection molding is one of plastic forming technology which can easily mass-produce plastic parts with various and even complex shape. The technology has lots of difficulties in making a good part due to phase change of material, high applied pressure, and fast melt flow speed in the cavity. To overcome the problems, they had to make trial and error method until the CAE(Computer Aided Engineering) could be a tool for concurrent engineering. In this paper, we investigate the optimal design for a plastic DVD tray part by systematic approach of the commercial CAE program. In design, we should consider two objectives which are both dimensional stability and cost-down. The dimension of the part is crucial because the tray should carry a DVD correctly, but the part is too thin to injection-mold easily. In order to improve the moldability, the mold is designed in the form of stack mold which is a kind of 4 hot runner system. In first, we changed the stack-mold system with one hot-runner to cost down, and decided the optimal position of the gate. After that, we investigate the effect of both the layout of cooling channels and the cooling temperature on the shrinkage of the DVD tray. A optimal simulation approach, the gate design is 2Gate#3 and the layout is Case2 cooling line as the optimal temperature of $70^{\circ}C$. The Moldflow and PC+ABS are used for the CAE program and material respectively.

• Proceedings of the KAIS Fall Conference
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• 2012.05b
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• pp.593-596
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• 2012

본 논문에서는 형식 조립식 하수관거 기초의 상재하중과 외압에 따른 거동을 범용 구조해석 프로그램인 ABAQUS 2009의 CAE 기능과 범용 CAD 프로그램인 Auto CAD Mechanical 2011의 3D 모델링을 통해 실제 실험결과와 비교하여 복잡한 구조의 구조물에서의 해석 정당성과 방법을 제안하고자 한다.

• Journal of the KSME
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• v.44 no.7
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• pp.18-19
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• 2004

급변하는 시장 요구와 수요에 신속히 대처하기 위하여 제품의 제조 및 조립에 요구되는 각 부품을 설계 단계에서부터 CAE 기술을 적용하여 정량적인 설계 과정으로 확립하고 동시에 이 결과를 제품 개발과 관련된 종사자가 쉽게 공유하게 하는 효율적인 동시 공학적 설계 과정은 기업의 생산성 향상 및 제품 개발 기간 단축을 위해 필수 불가결하게 되었다.(중략)

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.59-60
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• 2015

본 논문에서는 상용 CAE 프로그램인 ANSYS를 이용하여 전자기해석과 유동해석을 연계 계산하였고, 전류크기를 변수로 하여 접점 사이에 발생되는 온도분포를 분석함으로써 컵형 AMF 전극의 아크집중 현상을 예측하였다.

• Journal of the Korean Society for Precision Engineering
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• v.23 no.5 s.182
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• pp.24-29
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• 2006

• Journal of the Korea Convergence Society
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• v.6 no.5
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• pp.49-54
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• 2015

Nowadays, one lift among the fundamental equipments at auto-repair must withstand the heavy weight of car. Therefore, the strong lift which is easy to make repairs on cars is the indispensible equipment. In this study, three kinds of lifts are modelled and the simulation analysis is carried out with the finite element analysis program of ANSYS. The durability of lifts due to each configuration can be estimated on the background of this study result and the data to be contributed to the development of new lift for car with safety and durability can be accumulated ultimately. And it is possible to be grafted onto the convergence technique at design and show the esthetic sense.

• Journal of the Society of Naval Architects of Korea
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• v.30 no.2
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• pp.1-12
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• 1993

The role of product model in CIM environemt(where such heterogenous application programs as CAD, CAE, CAM, Database, and Expert Systems are included) is system integration. Product model manages all the information related to manufacuring activities. This information includes shapes, operation, process, scheduling, quality, and mangement. Product model architecture includes product model kernel, object schema, model manipulation language, and user interface. Objects to be shared are defined using the model manipulation luage and the defintions are saved in the object schema. In this paper, we present the design and implementation of a prototype. In this prototype, application programs for CAPP(Computer Aided Process Planning) are used.

• Proceedings of the KAIS Fall Conference
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• 2010.11a
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• pp.301-304
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• 2010

본 논문에서는 다수 캐비티 금형의 러너 내 불균일한 전단분포로 인해 발생되는 충전불균형에 따른 치수정밀도, 기계적 강도 등 물성의 차이가 발생되는 문제점을 해소하기 위해서 수지가 처음 분기되는 2차 러너의 구조에 변화를 주어 다수 캐비티 사출성형에서 충전균형을 위한 러너시스템을 제시하였다. 이 러너시스템은 전단률차이에 의한 즉, 온도가 불균일한 수지의 흐름을 혼합함으로써 수지의 흐름을 균일하게 하여 충전균형을 이루도록 하였다. PP수지를 대상으로 각 캐비티 간 균형충전에 대해 이 러너시스템이 효과가 있는지 검증하기 위해 CAE프로그램(Moldflow)을 이용한 유동해석을 통해 그 효과를 나타내 보았다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.410-413
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• 2001

This paper is to model a 3D-shape product applying mathematically the data acquired from a 3D scanner and using an Automatic Design Program. The research studied in the reverse engineering up to now has been developed continuously and surprisingly. However, forming 3D-shape solid models in CAE and CAM, based on the research, the study leaves much to be desired. Especially, analyses and studies reverse-designing automatically using measured data after manufacturing. Consequently, we are going to acquire geometric data using an 3D scanner in this study with which we will open a new field of reverse engineering by a program whic hcan design a 3D-shape solid model in a CAD-based program automatically.