• Title, Summary, Keyword: 스피닝

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A Study on the Process of Tube Spinning for the Titanium Alloy (티타늄 합금재의 튜브 스피닝 공정해석)

  • 홍대훈;황두순;이병섭;홍성인
    • Journal of the Korean Society of Propulsion Engineers
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    • v.4 no.3
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    • pp.55-63
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    • 2000
  • Studies for tube spin forming have been implemented restrictively compared to spinning process, because of the complex of deformation mechanism. Especially there were not many studies by using FEM(Finite Element Method) for overcoming restriction of upper bound method. In this paper, the tube spinning process is analyzed to produce cylindrical body made by titanium alloy. In analysis, processing parameters was obtained by using upper bound method to consider material properties of titanium alloy and finite element analysis was implemented to investigate the flatness and the elongation of the titanium alloy workpiece by using ABAQUS code. The independent variables are ; material properties of workpiece, angles of roller, reduction of diameter. Three variables, two angles of roller and reduction of diameter are optimized by using the upper bound method. In this method, we can estimate the workable power, working force and reduction of diameter, and also the flatness and the elongation of workpiece by the finite elements analysis using ABAQUS/standard. The results indicates that these variables play a critical factors of spinning process for the titanium alloy and the optimum values of these variables.

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Active Spinning Training System using Complex Physiological Signals (복합 생체신호를 이용한 능동형 스피닝 트레이닝 시스템)

  • Kim, Cheol-Min;Kang, Gyeong-Heon;Kim, Eun-Seok
    • The Journal of the Korea Contents Association
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    • v.15 no.7
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    • pp.591-600
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    • 2015
  • Recently high interest in health and fitness has led to vibrant researches for the active fitness system to learn and enjoy the exercise program for oneself. In this paper, we design and implement the active spinning training system which enables user to have self-learning and experience of customized spinning training program by the biometric and movement information acquired from user's physiological signals. The proposed system provides the appropriate difficulty of spinning program which reflects the concordance rate of spinning dance gestures and the amount of exercising by analyzing the physical status of participant from his brain and pulse waves and recognizing the skeletal movement in real time. For the higher exercise effect, the system offers a virtual personal trainer to show the correct poses and controls the level of difficulty depending on the concordance rate of participant's motions. The experiment with various participants through the proposed system shows that it is able to help users in getting the available exercise effect in comparatively short time.

Sport Functional Movement for Physically Interactive Spinning Game Implementation (체감형 스피닝 게임 구현을 위한 스포츠 기능적 움직임)

  • Gil, Young-Ik;Lee, Hyeon-Ju;Ko, Il-Ju
    • Journal of Korea Game Society
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    • v.20 no.2
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    • pp.139-152
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    • 2020
  • Physically interactive sports games are expanding to be training forms to replace real sports. Previous Physically interactive sports games are mostly technical studies for reality and immersion, and there is a few research related to sports movements for exercise. In this paper, we implement the physically interactive spinning game by applying the functional movement of spinning so that it can't only replace the real spinning but also an individual can play. Sports functional movement is expected to be an appropriate way to create physically interactive sports games.

Evaluation of the Structural Safety of a Vessel with Different Material(Cr-13)-Supplemented Screw Thread (이종재료가 보충된 나사산을 갖는 용기의 구조안전성 평가)

  • Choi, Yong Hoon;Bae, Jun Ho;Kim, Chul
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.39 no.4
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    • pp.375-382
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    • 2015
  • The dome and neck part of a vessel is generally formed by a hot spinning process with a seamless tube. However, as studies on and design data from the hot spinning process are insufficient, this process has been performed based on trial and error and the experiences of field engineers. Changes in the inner diameter from the bottom to the top of the neck have occurred mainly because of the characteristics of the hot spinning process due to the high-speed rotation of the rollers. In this study, a theoretical and finite element analysis of the vessel is conducted with different material(Cr-13)-supplemented screw threads for tapping and to reduce shape errors. Based on the results, tne structural safety under the operating conditions is evaluated.

자동차용 충격흡수기의 튜브 스피닝 공정 해석

  • 김영호;박재우;조호성
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.3
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    • pp.33-38
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    • 2000
  • In process of tube spinning far shock absorber on vehicles, the selection of feed rate and rounding radius of forming roller and revolution speed of tube and forming roller, forming gap between die and forming roller are very important factors to obtain the optimal process result. In this paper, rigid-plastic FEM and UBET analysis are applied to verify effect of each factors by forming load. We can obtain the optimal conditions to prevent defects during processing.

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A Lower Upper - bound Solutions for Shear Spinnings of Cones (원추체의 전단스피닝 가공에 대한 상계해석)

  • 최재찬
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.6 no.2
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    • pp.169-175
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    • 1982
  • 원주체의 전단스피닝 가공에서 가공물의 반경과 두께 방향의 상대 위치가 변화하지 않는다는 조건 아래서 흐름 함수에 의하여 속도장을 구하고, 접촉계수에 대하여 변형에너지의 국소치를 구함으로써 상당히 낮은 상계치를 얻었으며, 이를 A1-1100-1, A1-1100-H14, A1-6061-0 등 여러 가지 재료에 대한 실험치와 비교한 결과, 정량적으로 일치하였다.

Forming of Dome and Inlet Parts of a High Pressure CNG Vessel by the Hot Spinning Process (열간 스피닝 공정을 통한 CNG 고압용기의 돔 및 입구 부 성형)

  • Lee, Kwang O;Park, Gun Young;Kwak, Hyo Seo;Kim, Chul
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.40 no.10
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    • pp.887-894
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    • 2016
  • The CNG pressure vessel is manufactured by a deep drawing and ironing (D.D.I) process for forming cylinder parts, followed by a spinning process for formation of the dome part. However, studies on the buckling phenomenon of the dome part and formation of the inlet part have not been performed yet, and the CNG pressure vessel is produced by the experience of the field engineers and the trial and error method. In this study, buckling phenomenon during the spinning process was predicted by comparing critical buckling loads obtained through theoretical analysis with axial loads from the FEA, and a method for preventing buckling of the dome part was proposed by employing commercial software (Forge NxT 1.0.2). Also, to form the inlet part, forming loads of the roller at contact point between the roller and the dome part were analyzed according to radii of the dome part, and the inlet part was formed by controlling the radius of the dome part.

Development of the Wheel Disc Spinning Machine (휠 디스크 스피닝 성형기 개발)

  • Kang, Jung-Sik;Kang, E-Sok;Lee, Hang-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.6
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    • pp.58-65
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    • 1999
  • The spinning machine has been developed for a bus and truck wheel disc which is manufactured by spinning process method. This machine has the mechanical structure with bed, 2-column, cross head, 2-vertical slide, 2-horizontal slide with forming roller, clamp slide and main spindle similar to large size vertical lathe. Main spindle attached the mandrel is rotated about 500rpm drived by 280kW power DC motor, and a rotating black material pressed on the mandrel with the clamp slide is spinformed by 2-forming rollers which are attached inner end of the 2-horizontal slides. The 2-vertical and 2-horizontal slides are actuated by the hydraulic cylinder which is controlled by the servo valve individially, and these servo valves are controlled by control signal of the CNC controller which is computed with position signal feedbacked from the encoder sensor. The developed machine can manufacture wheel disc of various section profile without mandrel change because section profile is easily modified using program editing in the CNC controller processor. The wheel disc manufactured by spinning process method has many advantages that the endurance is increased by 2 times and the weight is decreased by 30% compared with a conventional disc.

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Uncertainty Analysis of Spinning Rotor Gauge Calibrated by High Vacuum Standard of Static Expansion Method (정적법 고진공표준기에 의해 교정한 스피닝 로터 게이지 불확도 평가)

  • Hong S. S.;Lim I. T.;Shin Y. H.;Chung K. H.
    • Journal of the Korean Vacuum Society
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    • v.14 no.4
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    • pp.186-194
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    • 2005
  • A Spinning Rotor Gauge was calibrated between $4.04\times10^{-3}$ Pa and $1.11\times10^{-2}$ Pa at the high vacuum standard by static expansion method. The results were analysed according to the document of 'Guide to the Expression of Uncertainty in Measurement' of ISO. The expanded uncertainty was $3.0035\times10^{-3}$ Pa at $7.5448\times10^{-3}$ Pa. $95\%$ confidence level, and coverage factor of k = 1.