• Title/Summary/Keyword: optimum condition

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A Study on the Rapid Prototyping using Automatic Design Program (자동설계 프로그램을 이용한 급속성형에 관한 연구)

  • 이승수;김민주;전언찬
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.11 no.5
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    • pp.15-22
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    • 2002
  • A study is the selection of optimum forming condition for RP system. We develop the Automatic design program for machine element using visual LISP program in AutoCAD. Automatic design program reduces the required time for feedback between design and manufacturing of workpiece. Also we investigate the relationship between circularity of 3D solid model and circularity of rapid prototype using RP system and we will find optimum forming condition in RP system.

A Study on the Rapid Prototyping using Automatic Design Program (자동설계 프로그램을 이용한 급속성형에 관한 연구)

  • 김세민;이승수;김민주;주만식;전언찬
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2001.04a
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    • pp.365-370
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    • 2001
  • This study is the selection of optimum forming condition for RP system using ADS. Program using ADS reduces the required time for feedback between design and manufacturing of workpiece. When we produce rapid prototype using RP system, we investigate the relationship between Facetres in system variable number of AutoCAD and circularity of rapid prototype, and we will find optimum forming condition in RP system.

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A Study on prototyping and Automatic Design Programing using VisualLISP (VisualLISP을 이용한 자동설계프로그래밍과 시작품 제작에 관한 연구)

  • 김태호;이승수;김민주;박정보;전언찬
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.996-999
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    • 2001
  • This study is the election of optimum forming condition for RP system using ADS. Program using ADS reduces the required time for feedback between design and manufacturing of workpiece. When we produce rapid prototype using RP system, we investigate the relationship between Facetres in system variable number of AutoCAD and circularity of rapid prototype, and we will find optimum forming condition in RP system.

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Studies on the Optimum Preconditioning Condition of BASMA Tobacco Leaves (BASMA 잎담배의 최적 습점조건에 관한 연구)

  • 김기환;김천석
    • Journal of the Korean Society of Tobacco Science
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    • v.11 no.1
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    • pp.79-85
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    • 1989
  • For the Purpose of this study, were researched the optimum condition preconditioning condition of orient tobacco leaves . The loss of 3-methyl pentanoic acid (3-MP) component of BASMA leaves in the treatment process amount to about 60% , but the loss of 3-MP At the optimum conditions of BASMA CTC treatment, the temperature was 45-$65^{\circ}C$ and the treatment time 25-35 minutes. And further, the physical properties of BASMA after CTC treatment was remarkably similar to the control's. Since VTC minimized the loss, it is suggested that CTC method should be changed by VTC method.

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Optimal Condition for Spot Weldment of Dissimilar Steel Sheet in Automotive (GA에 의한 차량용 이종재 최적점용접 조건)

  • Han, Jae-Hee;Yang, Sung-Mo;Yu, Hyo-Sun;Kim, Tae-Jin
    • Transactions of the Korean Society of Automotive Engineers
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    • v.18 no.4
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    • pp.68-73
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    • 2010
  • Welding conditions in process of spot welding must become optimum and need to guarantee stability and reliability of vehicle body considering dynamic load history. Because welding parameters in process of spot welding are various, it is difficult that the quality of spot weldment was included in the optimum levels. In this paper, we found the optimum welding conditions satisfying KS spot welding qualities using genetic algorithm and spot welding experiments of high tensile strength steel and galvanized steel. Those experiments were dissimilar weld and 2-lap spot welding. Genetic algorithm created random welding condition after that, selected optimum individuals by probability concept.

A study on the Optimum Wheel Characteristics Using Grinding Machine (연삭 장비를 이용한 최적의 휠 특성분석)

  • Ko, Jun-Bin;Kim, Woo-Kang;Jeon, Tek-Jong
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.7 no.4
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    • pp.142-148
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    • 2008
  • This study aims to find the optimal cutting conditions, which are obtained by grinding condition, and the grinding characteristics and condition of constant velocity joint were investigated with respect to wheel velocity, depth of cut, feed speed. Grinding machine has been widely used in manufacturing optical reflects of metal. Such as steel are easy to be machined because of their proper material. As a result I obtained the data of grinding conditions makes good surface roughness and the optimal condition of grinding and get the mesh condition. The purpose of this study is to find the optimum grinding wheel characteristics for cutting constant velocity joint.

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A Study on Vacuum Sintering of M2 HSS Powder (M2 분말의 진공소결에 관한연구)

  • Choe, Yeong-Taek
    • 한국기계연구소 소보
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    • s.20
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    • pp.89-104
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    • 1990
  • This study was carried out to obtain the most optimum conition in vacuum sintering of M2 HSS powder, by analysis of sintering characteristics and fracture strength in several conditions. The conclusion deduced from this study are as follows; -Boron was more effective element than graphite; at this time, the optimum amount of addition was 0.05 wt% -The optimum condition of sintering temperature and time were 1190- $1200^{\circ}C$ and 1-1.25hr, respectively -Fracture strength of vacuum sintered and heat-treated specimen in the most optimum condition was 2-2.5KN/ $mm^2$

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The Study on the Wafer Surface and Pad Characteristic for Optimal Condition in Wafer Final Polishing (최적조건 선정을 위한 Pad 특성과 Wafer Final Polishing의 가공표면에 관한 연구)

  • Won, Jong-Koo;Lee, Eun-Sang;Lee, Sang-Gyun
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.11 no.1
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    • pp.26-32
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    • 2012
  • Polishing is one of the important methods in manufacturing of Si wafers and in thinning of completed device wafers. This study will report the characteristic of wafer according to processing time, machining speed and pressure which have major influence on the abrasion of Si wafer polishing. It is possible to evaluation of wafer abrasion by load cell and infrared temperature sensor. The characteristic of wafer surface according to processing condition is selected to use a result data that measure a pressure, machining speed, and the processing time. This result is appeared by the characteristic of wafer surface in machining condition. Through that, the study cans evaluation a wafer characteristic in variable machining condition. It is important to obtain optimal condition. Thus the optimum condition selection of ultra precision Si wafer polishing using load cell and infrared temperature sensor. To evaluate each machining factor, use a data through each sensor. That evaluation of abrasion according to variety condition is selected to use a result data that measure a pressure, machining speed, and the processing time. And optimum condition is selected by this result.

Application of Design of Experiment Optimum Working Condition in Flat End-Milling (평면 엔드밀의 최적 가공조건을 위한 실험계획법의 적용)

  • Lee, Sang-Jae;Bae, Hyo-Jun;Seo, Young-Baek;Park, Heung-Sik;Jun, Tae-Ok
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.2 no.3
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    • pp.20-25
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    • 2003
  • The End-milling has been widely used in the industrial world because it is effective to cutting working with various shape. Recently the end-milling is demanded the high-precise technique with good surface roughness and rapid manufacturing time for precision machine and electronic elements. The cutting working of end-milling such as, cutting direction, revolution of spindle, feed rate and depth of cut have an effect on optimum surface roughness. This study was carried out to decide the working condition for optimum surface roughness and rapid manufacturing time by design of experiment and ANOVA. From the results of this study, the optimum working condition for end milling is upward cutting in cutting direction, 600rpm in revolution of spindle, 240mm/mm in feed rate, 2mm in axial depth of cut and 0 25mm in radial depth of cut. The design of experiment has become an useful method to select optimum working condition mend-milling.

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Selection of the optimum mixture condition for stabilization of Songdo silty clay (송도 지역 해양성 점토 고화처리를 위한 최적배합 조건의 선정)

  • Kim, Jun-Young;Jang, Eui-Ryong;Chung, Choong-Ki;Lee, Yong-Jun;Jang, Soon-Ho;Choi, Jung-Yeul
    • Proceedings of the Korean Geotechical Society Conference
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    • 2009.09a
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    • pp.412-419
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    • 2009
  • Large quantity of extra soils discharged from excavation site in Songdo area can be treated by hardening agents and utilized in surface stabilized layer overlying thick reclaimed soft soil deposit. Though surface layer stabilization method using cement or lime for very soft soils has been studied in recent years, but studies on moderately soft clayey silt has not been tried. The purpose of this research is to investigate optimum mixing condition for stabilizing Songdo marine soil with low plasiticity. The optimum mixing conditions of hardening agents with Songdo soil such as kind of agents, mixing ratio, initial water content and curing time are investigated by uniaxial compression test and laboratory vane test. The results indicate that strength increases with high mixing ratio and long curing time, while decreases drastically under certain water content before mixing. Finally, optimum mixing condition considering economic efficiency and workability with test results was proposed.

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