• 제목/요약/키워드: Manufacturing condition

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High Speed Machining Considering Efficient Manual Finishing Part II: Optimal Manual Finishing Process and Machining Condition (고속 가공을 이용한 금형의 효율적 생산 제 2 부: 사상 공정 및 가공 조건의 선정)

  • Kim, Min-Tae;Je, Sung-Uk;Lee, Hae-Sung;Chu, Chong-Nam
    • Journal of the Korean Society for Precision Engineering
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    • v.23 no.12 s.189
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    • pp.38-45
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    • 2006
  • In this work, optimal finish machining condition considering total time for mold or electrode manufacturing was investigated. First, manual finishing time according to the machining condition was analyzed for the work material. The effect of runout and phase shift of tool path on surface finish was also considered in those analyses. Secondly, optimal manual finishing processes were determined for various machining conditions. Finally, finish machining time and corresponding manual finishing time were taken into account for the estimation of the total time of manufacturing mold. Though small feed per tooth and pick feed reduced the manual finishing time, the finish machining time increased in such conditions. With a machining condition of feed per tooth of 0.2 mm and pick feed of 0.3 mm, the minimum total time of manufacturing mold was achieved in our machining condition.

A Study on the Actual Condition Survey of Apartment Rebar Work (공동주택 철근공사의 실태조사에 관한 연구)

  • Lee, Taick-Oun
    • Journal of the Korea Institute of Building Construction
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    • v.8 no.2
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    • pp.71-79
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    • 2008
  • The rebar work is very related to the safety and durability of the building. Recently, the rebar work is produced some serious problems due to the lack of skillful crafts-man and the rising cost of rebar materials. Many papers have dealt with the rebar work of the manufacturing system in plants with a view to improvement those problems. But, the research on the rebar work of the manufacturing system in field is in a insignificant condition. This study presents the following improvement schemes as a result. First, the education strengthening for evaluation on practical affairs, second, the reinforcement of drawing & management in shop drawing and finally the simplification of apartment rebar work in slab. Also, this paper aims at advancing apartment rebar work by the actual condition survey in slab work. The further research will be needed about the whole structure parts such as foundation, wall, girder and rebar truss-deck plate as one of the improvement methods.

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 Support System for Searching Robust Injection Molding Condition (안정적인 사출성형조건의 탐색을 위한 지원시스템)

  • Kim, Bo-Hyun;Baek, Jae-Yong;Yi, Il-Lang
    • IE interfaces
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    • v.18 no.1
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    • pp.73-81
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    • 2005
  • Injection molding has been widely used in producing plastic parts in large quantities. However, its productivity mainly depends on the expertise and experience of skilled workers because of the difficulty and complexity to determine a robust injection molding condition which is not influenced by the minor operational variation of an injection molding machine and produces good parts continuously. This study analyzes the defect types of the parts and proposes a support system to assist users in determining the robust process condition. The support system calculates the start condition from the information of an injection mold, the injection molding machine, the resin used, and the part. Through the iterative step which updates the condition using the defect information of the part tested, users can obtain the initial condition which produces the part without any problem for the first time. The support system also assists users in obtaining the robust condition from the initial condition using the technique of experimental design. To prove the validity of the support system, this study implements it in the control panel of the injection molding machine.

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.

Condition Monitoring of Tool Wear and Breakage using Sound Pressure in Turning Processes (선삭공정에서 음압을 이용한 공구마멸 파손의 상태감시)

  • 이성일
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.6 no.3
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    • pp.36-43
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    • 1997
  • In order to make unmanned machining systems with satisfactory performances, it is necessary to incorporate appropriate condition monitoring systems in the machining workstations to provide the required intelligence of the expert. This paper deals with condition monitoring for tool wear and breakage during turning operation. Developing economic sensing and identification methods for turning processes, sound pressure measurement and digital signal processing technique are proposed. The validity of the proposed system is confirmed through the large number of cutting tests.

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The Correlation between Manufacturing Parameters and friction Characteristics of Automotive Friction Materials by Taguchi Robust Experimental Design (다구찌 로버스트 실험계획법에 의한 자동차용 마찰재의 성형조건과 마찰특성과의 상관관계에 환한 연구)

  • Kim, Kwang-Seok;Jang, Ho
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 1999.11a
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    • pp.225-232
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    • 1999
  • The effect of manufacturing parameters such as molding and curing conditions on friction characteristics of friction materials was studied using a pad-on-disk type friction tester. Friction materials containing 15 ingredients were investigated for an optimal manufacturing condition for the best friction characteristics employing Taguchi robust experimental design. The main effects were different for mechanical properties and friction characteristics and were strongly influenced by manufacturing conditions. An optimum manufacturing condition was obtained to achieve the best friction characteristics concerning mechanical properties(hardness, porosity, wear resistance), friction stability, and change of rotor temperature.

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A Study on the Optimization of Position Tolerance of Fasteners Considering Process Capability (공정능력을 고려한 체결구 부품의 위치공차 최적화 방법 연구)

  • Lee, Sang-Hyun;Lee, Tae-Gun;Chang, Sung-Ho
    • Proceedings of the Safety Management and Science Conference
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    • 2008.04a
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    • pp.417-428
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    • 2008
  • Designers have to consider voice of customer, process capability, manufacturing standards & condition, manufacturing method, characteristics of products to decide tolerances. Especially, in case of position of hole and pin, designers have to consider process capability to decide tolerances. The traditional position tolerances used in a drawing are theoretical values which are allocated to position under the worst case assembling condition that both hole and pin are the maximum material condition(MMC). However, When the process capability is high, more exact product size can be produced under stable manufacturing condition. larger clearance of hole and pin can be allocated. In this point of view, manufacturer could increase the yield by allocating larger position tolerance than theoretical position tolerance of hole and pin considering process capability.

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A Study on the Optimization of Position Tolerance of Fasteners Considering Process Capability (공정능력을 고려한 체결구 부품의 위치공차 최적화 방법 연구)

  • Lee, Sang-Hyun;Lee, Tae-Geun;Chang, Sung-Ho
    • Journal of the Korea Safety Management & Science
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    • v.11 no.1
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    • pp.75-85
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    • 2009
  • Designers have to consider voice of customer, process capability, manufacturing standards & condition, manufacturing method and characteristics of products to decide tolerances. Especially, in case of position of hole and pin, designers have to consider process capability to decide tolerances. The traditional position tolerances used in a drawing are theoretical values which are allocated to position under the worst case assembling condition that both hole and pin are the maximum material condition(MMC). However, when the process capability is high, more exact product size can be produced under stable manufacturing condition. Larger clearance of hole and pin can be allocated. In this point of view, manufacturer could increase the yield by allocating larger position tolerance than theoretical position tolerance of hole and pin considering process capability.

A study on the Design on the Tubular Drive Shaft (중공 드라이브 샤프트의 설계에 관한 연구)

  • Kim, Woo-Kang;Go, Jun-Bin;Kim, Hong-Bae
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.8 no.3
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    • pp.7-12
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    • 2009
  • This study aims to find the friction welding and induction harden conditions, which are obtained by welding conditions, and the friction welding characteristics and induction harden conditions of tubular shaft were investigated with respect to low load test, high load test. Friction welding and induction harden machine have been widely used in manufacturing reflects of metal. The material of solid and tubular shaft selected that is used for parts of automobile steel. Such as steel are easy to be machined because of their proper material. As a result I obtained the data of friction welding conditions makes good and the condition of friction and get the tubular condition. The purpose of this study is to find fatigue test condition and induction harden characteristics design for tubular shaft.

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