• Title/Summary/Keyword: Design of experiments

Search Result 595, Processing Time 0.127 seconds

Optimal Grinding Condition of Tungsten Carbide(WC) for Aspheric Glass Lens Using DOE (DOE를 적용한 비구면 Glass 렌즈 성형용 초경합금(WC) 코어 연삭가공 최적화)

  • Kim, Hyun-Uk;Jeong, Sang-Hwa;Ahn, Jun-Hyung;Cha, Du-Hwan;Lee, Dong-Gil;Kim, Sang-Suk;Kim, Hye-Jeong;Kim, Jeong-Ho
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.5 no.4
    • /
    • pp.41-45
    • /
    • 2006
  • In recent years, the demands of the aspheric glass lenses increase since it is difficult to obtain the desirable performance in the plastic lens. Glass lens is manufactured by the forming with high precision mold core. This paper presents the analysis of optimal grinding condition of tungsten carbide(WC, Co 0.5%) using design of experiments(DOE). The process parameters are turbin spindle, work spindle, feedrate and depth of cut. The experiments results are evaluated by MINITAB software.

  • PDF

Optimization of a Gate Valve using Design of Experiments and the Kriging Based Approximation Model (실험계획법과 크리깅 근사모델에 의한 게이트밸브 최적화)

  • Kang, Jung-Ho;Kang, Jin;Park, Young-Chul
    • Transactions of the Korean Society of Machine Tool Engineers
    • /
    • v.14 no.6
    • /
    • pp.125-131
    • /
    • 2005
  • The purpose of this study is an optimization of gate valve made by forging method instead of welding method. In this study, we propose an optimal shape design to improve the mechanical efficiency of gate valve. In order to optimize more efficiently and reliably, the meta-modeling technique has been developed to solve such a complex problems combined with the DACE (Design and Analysis of Computer Experiments). The DACE modeling, known as the one of Kriging interpolation, is introduced to obtain the surrogate approximation model of the function. Also, we prove reliability of the DACE model's application to gate valve by computer simulations using FEM(Finite Element Method).

Performance Evaluation for Coordinate Measuring Machine using Design of Experiments (실험계획법을 이용한 3차원 좌표 측정기의 성능 평가)

  • Lee, Seung-Pyo;Ha, Sung-Kyu
    • Transactions of the Korean Society of Machine Tool Engineers
    • /
    • v.17 no.4
    • /
    • pp.133-139
    • /
    • 2008
  • With the increasing demand for higher production quality and growing competition in the global market, coordinate measuring machine(CMM) has been widely used in industry to improve the efficiency and effectiveness of measurement. In this paper the performance evaluation of coordinate measuring machine is proposed using design of experiments. A factorial design is applied to carry out the performance test proposed by ISO 10360 with a length bar and to investigate CMM measurement errors associated to orientation and length in the work volume. The determination of the significance of effects in an experiment is made through the analysis of variance(ANOVA). The results show that the proposed method is suitable to analyze the factors which affect the CMM measurement performance.

Determination of Optimal Cutting Conditions in Milling Process using Multiple Design of Experiments Technique (밀링 가공 공정에서 복합실험계획법을 이용한 최적 절삭조건 결정)

  • Kim, Yong-Sun;Kwon, Won-Tae
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.20 no.3
    • /
    • pp.232-238
    • /
    • 2011
  • In the present study, Taguchi method is used to determine the rough region first, followed by RSM technique to determine the exact optimum value during milling on a machining center. A region reducing algorithm is applied to narrow down the region of the Taguchi method for RSM. The result from the Taguchi method is fed to train the artificial neural network (ANN), whose optimum value is used to drive the region reducing algorithm. The proposed algorithm is tested under different cutting condition and results show that the introduced algorithm works well during milling process. It is also shown that theoretically obtained optimal cutting condition is very close to experimentally obtained result.

Shape Optimization to Minimize The Response Time of Direct-acting Solenoid Valve

  • Shin, Yujeong;Lee, Seunghwan;Choi, Changhwan;Kim, Jinho
    • Journal of Magnetics
    • /
    • v.20 no.2
    • /
    • pp.193-200
    • /
    • 2015
  • Direct-acting solenoid valves are used in the automotive industry due to their simple structure and quick response in controlling the flow of fluid. We performed an optimization study of response time in order to improve the dynamic performance of a direct-acting solenoid valve. For the optimal design process, we used the commercial optimization software PIAnO, which provides various tools for efficient optimization including design of experiments (DOE), approximation techniques, and a design optimization algorithm. 35 sampling points of computational experiments are performed to find the optimum values of the design variables. In all cases, ANSYS Maxwell electromagnetic analysis software was used to model the electromagnetic dynamics. An approximate model generated from the electromagnetic analysis was estimated and used for the optimization. The best optimization model was selected using the verified approximation model called the Kriging model, and an optimization algorithm called the progressive quadratic response surface method (PQRSM).

A Basic Study of Crashworthiness Optimization Using Homogenization Method(I) (균질화법을 이용한 충돌 최적화 기초 연구(I))

  • 조용범;신효철
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.9 no.3
    • /
    • pp.190-200
    • /
    • 2001
  • The homogenization method is applied to maximize crash energy absorption for a given volume. To obtain the best combination of optimizing factors by resizing and threshold algorithms for an example problem, the sensitivity analysis has been performed using design of experiments. The results show that very little interaction among optimizing factors is found. Optimization analysis of several combination of factors is conducted; and the orignal design and a new design with holes for an example problem are compared for crash energy absorption.

  • PDF

Optimal design of High precision Maglev system using Finite Element Method and Design Of Experiments (유한 요소법과 실험계획법을 병행 사용한 고정밀 자기 부상 시스템의 최적 설계)

  • Lee, Sung-Gu;Won, Sung-Hong;Lee, Hyung-Woo;Lee, Ju
    • Proceedings of the KIEE Conference
    • /
    • 2005.07b
    • /
    • pp.1267-1269
    • /
    • 2005
  • This paper presents the design for improving performance of the high-precision Magnetic levitation system. Motor performance on various design schemes such as thickness and magnetizing patterns of the permanent magnets, pole pitch, length of air gap, turn number of windings, and thickness of the aluminum-core has been investigated in detail by using FEM(Finite Element Method) Simulation-based DOE(Design of Experiments) method is also applied in order to reduce the large number of analysis according to each design variable and consider the effect among variables. The design in all aspects is proposed by an optimization algorithm using regression equation derived from the simulation-based DOE.

  • PDF

Optimal Parameter Design for Al/SiC Composites using Design of Experiments (실험계획법에 의한 Al/SiC 복합재료의 최적공정 설계)

  • Lee, K.J.;Kim, K.T.;Kim, Y.S.
    • Journal of Power System Engineering
    • /
    • v.15 no.5
    • /
    • pp.72-76
    • /
    • 2011
  • In this work, the parameter optimization for thermal-sprayed Al/SiC composites have been designed by $L_9(3^4)$ orthogonal array and analysis of variance(ANOVA). Al/SiC composites were fabricated by flame spray process on steel substrate. The hardness of composites were measured using micro-vickers hardness tester, and these results were analyzed by ANOVA. The ANOVA results showed that the oxygen gas flow, powder feed rate and spray distance affect on the hardness of the Al/SiC composites. From the ANOVA results, the optimal combination of the flame spray parameters could be extracted. It was considered that experimental design using orthogonal array and ANOVA was efficient to determine optimal parameter of thermal-sprayed Al/SiC composites.

An Experimental Study on the Warpage of a Film Insert Molded Plate (필름 인서트 사출성형 평판의 휨 변형에 관한 실험적 연구)

  • Yoo, Y.G.;Lee, H.S.
    • Transactions of Materials Processing
    • /
    • v.21 no.1
    • /
    • pp.30-35
    • /
    • 2012
  • FIM(Film Insert Molding) is an innovative method of producing decorated parts for a wide range of products. Because it requires fewer steps when compared to conventional production methods, the time and cost of manufacturing high quality components can be reduced considerably. In this paper, the effects of processing conditions on the warpage of film-insert molded plate were investigated by using a design of experiments. The dominant factors affecting warpage were mold temperature and holding pressure. Warpage increased with the temperature difference between stationary mold and fixed one. Even when the mold temperature difference was zero, the plate with a film was bent after ejection such that the film side protruded. As holding pressure increased, warpage decreased significantly. In addition warpage increased with time increment for the film-insert molded plates.

A Study on the Optimal Cutting Condition of High Speed Feeding Type Laser Cutting Machine by Taguchi Method (다구찌 방법을 이용한 고속 이송방식 레이저 절단기의 최적 절단 조건에 관한 연구)

  • 임상헌;박동근;이춘만
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.21 no.6
    • /
    • pp.77-83
    • /
    • 2004
  • Cutting by a high speed laser cutting machine is one of most effective technologies to improve productivity. This paper has studied to obtain the cutting characteristics and optimal cutting conditions in a high speed feeding type laser cutting machine by Tacuchi method in design of experiments. A Lf(34) orthogonal array is adopted to study the effect of adjustment parameter. The adjustment parameters consist of cutting speed, laser power, laser output duty and assistant gas pressure. And the quality feature is selected as surface roughness of sheet metal. Variance analysis is performed in order to evaluate the effect of adjustment parameters on the quality feature of laser cutting process.