• Title/Summary/Keyword: Designing Manufacturing

Search Result 485, Processing Time 0.026 seconds

Counter-deforming Method for a Bracket Design of a Ship Via Geometric Shape Deformation (기하적인 형상 변형을 이용한 선박 브라켓 부재의 역변형 설계)

  • Cheon, Sanguk;Kim, Hyeong-Cheol
    • Korean Journal of Computational Design and Engineering
    • /
    • v.18 no.5
    • /
    • pp.321-328
    • /
    • 2013
  • A method of designing a manufacturing shape of ship plate parts considering welding deformation is introduced. In this paper, the design shape of a bracket is deformed not by a thermoelastic method but by a pure geometric method. Deformation quantities are estimated based on data captured in the field and then a manufacturing design shape is obtained by deforming an original design shape by a geometric deformation method. The proposed method has been implemented and tested in the shipyard.

The Establishment of Bonding Conditions of Cu Sheet using an Ultrasonic Metal Welder (초음파 금속 용착기를 이용한 Cu 박판의 접합성 평가)

  • Park, Woo-Yeol;Jang, Ho-Su;Park, Dong-Sam
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.11 no.2
    • /
    • pp.66-72
    • /
    • 2012
  • Ultrasonic metal welder is consisted of power supply, transducer, booster, and horn. Precise designing is required since each part's shape, length and mass can affect driving frequency and vibration mode. This paper gives a description of an experimental study of the ultrasonic welding of metals. A horn suitable for 40,000Hz was attached to the ultrasonic metal welder in order to weld Cu sheet. The Cu sheet welding was done with different amplitude, pressure and welding time, and its maximum tension was measured. Maximum tension of 177.99N was obtained when the pressure was 2.5bar, amplitude was 80%, and welding time was 0.34sec. Therefore, excessive welding condition negatively influences maximum tension measurement result.

Study on Development of Automotive Door Trim Rail including Texturing Skin (텍스쳐링 스킨을 포함하는 자동차 도어트림 레일의 개발에 관한 연구)

  • Lee, Eun-Jong;Kim, Key-Sun
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.12 no.1
    • /
    • pp.28-34
    • /
    • 2013
  • For the senses of beauty and texture, internal components of small passenger cars are manufactured by texturing plastic with drawplate but those of deluxe passenger cars are manufactured by bonding pre-embossed skin to the surface of drawplate. As the pre-embossed skin is bonded at high temperature and pressure, the pattern of skin is distorted. The corner part is hardened and its dimension tolerance is changed by resulting in the increase with its defective rate. This study provides the method to design and manufacture the door trim track by vacuuming the non-patterned skin to upper-side drawplate which forms the pattern of descending skin. It is pressed to the plastic product with hot-press method and the damage of bossed-pattern is prevented. Valuation in this study has been done by analyzing, designing and experimenting method.

Coordinating Production Order and Scheduling Policy under Capacity Imbalance

  • Rhee, Seung-Kyu
    • Journal of the Korean Operations Research and Management Science Society
    • /
    • v.21 no.2
    • /
    • pp.171-186
    • /
    • 1996
  • This paper comes from an observation that overemphasis on capacity utilization meausre, which is usual under capacity shortage, can seriously hurt the firm's profit and potential process improvement. We suggest a model that can be used in designing a coordination scheme for decentralized marketing and manufacturing activities. Using a price and time-sensitive demand and capacitated lotsizing model, we derive an effective communication medium betwen marketing and manufacturing. This Balance Indicator of process capacity and flexibility also implies that the increase in capacity availability and setup time reduction should be balanced by its market requirements. This is particularly important when a firm tries to improve its process capability by kaizen. Further, the model can be used to show the comparative performances of scheduling policies under capacity imbalnce. We show the shortening the scheduling cycle can improve the firm profit without changing the simple scheduling rule.

  • PDF

A Study on the Fabrication and Analysis of Mechanical Parts of a Dynamically Tuned Gyroscope (동조자이로스코우프 기계부의 제작 및 해석에 관한 연구)

  • 안창기;윤종욱;이장무
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 1994.10a
    • /
    • pp.930-937
    • /
    • 1994
  • Straodown intertial navigation system(SDINS) is a navigational instrument necessary to guide and control a free vehicle. Dynamically Tuned Gyroscope(DTG) which is widely applied to SDINS convers a wide dynamic range and is simple and small. In study, the analysis of mechanical parts or sensor parts and research of balancing is performed for manufacturing a DTG. In error analysis the criterion considered during designing and manufacturing is established by quantitatively anayzing the effect of DTG performance by tolerance. And the theory of dynamic balancing is derived and unbalance is reduced through experiment. And the stiffness of flexure is verified by tuning experiment.

  • PDF

A Study on the Development of the Gear Design Program by using Auto_LISP (Auto_LISP을 이용한 기어설계 프로그램 개발에 관한 연구)

  • 조규종;김종석
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 2000.10a
    • /
    • pp.422-427
    • /
    • 2000
  • Gear design carried in former type determined a few variables like module, pressure angle, helix angle. After investigating repeatedly results obtained through stress analysis and making a determination an optimal shape, but its design process was not only complex but also difficult to get a precise profile curve from operating by hand. In this study, rotating shape of gear profile curves were generated automatically with standard spur gear, equivalent helical gear, shifted gear & pinion by using developed program which is Auto_LISP language supported in Auto-CAD. Output tooth profile by using CAE program is applied as Preprocessor for stress analysis in each contact points. This program which can be determined rapidly an optimal shape of gear will be successfully supported for Small & Medium companies designing and manufacturing gears by using Auto-CAD.

  • PDF

Design of a Torque Arm Pin and Elastomeric Bushings for the Three-point-Suspension Gearbox of a Wind Turbine (풍력발전기용 3점 지지 기어박스의 토크암 핀 및 탄성중합체 부싱 설계)

  • Shim, Sung Bo;Nam, Ju Seok
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.26 no.2
    • /
    • pp.199-204
    • /
    • 2017
  • In this study, analytical methods for designing a torque arm pin and elastomeric bushings of a conventional-type three-point-suspension gearbox of a wind turbine are investigated. The design loads for the torque arm were derived by considering the effects of the transmitted torque and self-weight of the gearbox. Based on the design loads, design methods for the torque arm pin and elastomeric bushings were introduced in the terms of material and size selection. Finally, a small-scale conventional-type gearbox was designed by applying the derived design methods. This study is an elementary and analytical study for the design of the torque arm pin and elastomeric bushings. It is necessary to verify and supplement the results further through extensive experimentation.

A Study on the Manufacturing Process for High-finned Tube of Copper Pipe using Roll Forming Method (전조공법을 이용한 동관의 하이핀 튜브 제조 공정에 대한 연구)

  • Kim, Tae-Gyu
    • Korean Journal of Materials Research
    • /
    • v.16 no.2
    • /
    • pp.111-115
    • /
    • 2006
  • High-finned tubes have good thermal conductivity and have better cooling efficiency than plain tubes or low-fined tubes due to bigger air contact area. During high-fined tubes are manufactured by roll forming, the main technique is illustrated to optimizing primary material(copper pipe), optimized die matrix designing technique for roll forming, control manufacturing speed to develop productivity etc. In this study, a roll forming system was developed in oder to produce high-finned tube. Also a multi-step roll forming die was designed & built to produce high-finned tube that has over 10 mm fin height. And then, roll forming test using copper pipe was performed to produce high-finned tube. Roll forming process for producing highfinned tube was optimized by analyzing and adjusting misrostructure, hardness, and surface roughness of roll formed high-fined tube.

PM Reduction Efficiency using Metal Type DPF (금속 DPF를 이용한 입자상물질의 저감효율에 관한 연구)

  • Rah, Wan Yong
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.21 no.5
    • /
    • pp.176-180
    • /
    • 2013
  • After-treatment apparatus ceramic DPF (diesel particulate filter) have been applied to reduce harmful particulate matters(PM) among emissions from diesel engines so far, but they are easy to be fragile and weak in thermal shock. This research aims to investigate a metal type filter which is superior in mechanical strength and heat conduction rate and is beneficial economically in manufacturing. Basic performance of metal DPF such asloading test, temperature gradient test, thermal shock test, heat resistant test and back pressure was carried out. And then their experimental data provided key informations in designing and manufacturing such as detailed structures of metal mesh filter. Also diesel engine and vehicle of 2957cc displacement was tested under lug-down 3 mode and CVS-75 mode. PM reduction efficiency was 54.5% using metal DPF without loss of performance and fuel consumption.

A Study of Aero for Hovercraft (공기부양선의 추진기 고찰)

  • Kang, Dong-Woo;Lee, In-Sun
    • Special Issue of the Society of Naval Architects of Korea
    • /
    • 2008.09a
    • /
    • pp.62-67
    • /
    • 2008
  • The hovercraft is the amphibious hovercraft. Design and manufacturing companies of the aero propeller exist rarely in the world. Hence the propeller has beef designed and manufactured by manufacturing companies which make aero propeller mainly. In this paper, the hovercraft propeller of similar, which is building and designing by HHIC, is considered the type of aero propeller, rotational speed, diameter, number of blades, Open air propeller efficiency. As the result of check, hovercraft which is necessary huge static thrust is needed the ducted propeller in order to improve climbing capacity. However, the number of blades and turning direction almost do not affect.

  • PDF