• Title/Summary/Keyword: TurnTool

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The Development of An Error Measurement System of 5-Axis Mill & Turn Machine Tool by Double Ball Bar Test (DBB를 이용한 5축 복합가공기의 오차 측정 시스템 개발에 관한 연구)

  • Kim T.H.;Jung Y.G.;Ko H.J.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2006.05a
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    • pp.243-244
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    • 2006
  • In this paper, the development of an error measurement system of 5-axis mill & turn machine tool presented by double ball bar test, which has been widely used to measure the overall accuracy of machining center. and the reliability of an error measurement system of 5-axis mill & turn machine tool was secured by the direct cutting test.

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Implementation and application of interactive Web3D Contents (상호대화식 Web3D 컨텐츠의 구현 및 응용)

  • Kim Hyeock-Jin
    • Journal of the Korea Computer Industry Society
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    • v.6 no.2
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    • pp.317-324
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    • 2005
  • The web technology related with internet at present is changed into the 3D interactive environment form one sided communication of simple contents. In this paper, a high quality interactive Web3D Contents was realized by using the TurnTool, a authoring tool. This paper suggests the method that can easily and quickly realize the Web3D manual which is more realistic md capable of interaction with user. This method makes up for the weak points in the existing Web3D tool system. Therefore we can realize the contents that able to easily interact through minimizing file size md omitting procedure of additional EAI(External Authoring Interface) by using the Java Script.

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A Method for Offline Inter-Turn Fault Diagnosis of Interior Permanent Magnet Synchronous Motor through the Co-Analysis (연동해석을 통한 영구자석 동기전동기의 오프라인 Inter-Turn 고장진단법)

  • Cho, Sooyoung;Oh, Ye Jun;Lee, GangSeok;Bae, Jae-Nam;Lee, Ju
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.3
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    • pp.365-373
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    • 2018
  • In this paper, inter-turn fault diagnosis of the interior permanent magnet synchronous motor (IPMSM) is performed in offline state by linking the finite element analysis (FEA) tool and control simulation tool. In order to diagnose the inter-turn fault, it is important to select the current value to determine the fault. First, the basic principles for inter-turn fault diagnosis of IPMSM are explained and co-analysis model for fault diagnosis is constructed. Further, in order to select the appropriate high frequency voltage, the change of the current value to be judged as failure was analyzed at various voltage and frequency conditions, and the change of the current value according to the number of the failed windings was analyzed. Finally, the current value to be judged as failure is selected.

Development and Verification of Treatment Programs by Turn and Roll Types to Improve the Function of Vestibular System (전정기 기능 향상을 위한 회전과 구르기 훈련 프로그램의 개발 및 검증)

  • Park, Yang-Sun;Kang, Sung-Ho;Lim, Young-Tae
    • Korean Journal of Applied Biomechanics
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    • v.22 no.2
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    • pp.209-217
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    • 2012
  • The purpose of this study was to develop a turn-type treatment program which applies the principle of spotting and a roll-type treatment program that induces off-vertical axis. 29 collegiate students volunteered for this study. 12-week treatment programs were applied to both 15 students for turn-type treatment group and 14 students for roll-type treatment group. As an analytic tool, eye camera was employed to verify the treatment programs for a stimulus upon a turn, recovery after a stimulus upon a turn, and nystagmus that affects a vestibular system. Two-way ANOVA with repeated measures was applied to see the significant differences between the treatment groups, and between the test periods. For Post-Hoc Test, paired t-test was used to within the group and independent t-test was used to between the groups. The results indicated that roll-type treatment training has maximized a stimulus on nystagmyus during the stimulus by a roll. Turn-type treatment training has maximized a stimulus on nystagmyus right after a stimulus by a roll and significantly decreased the intensity of nystagmyus during the recovery. Both turn and roll type treatments have reduced the recovery time which from nystagmyus to a normal status. Roll-type treatment has showed a much shorter recovery time for nystagmyus than the roll-type treatment has. Based on the results of treatment programs developed in this study, we expect the treatment programs can be applied to treat dizziness and to improve the function of vestibular system as a rehabilitation tool.

History as an Educational Tool: The Educational Turn of the Bakken Museum

  • Shin, Jieun
    • International Journal of Advanced Culture Technology
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    • v.9 no.4
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    • pp.71-85
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    • 2021
  • The history of the Bakken Museum, the Museum of Electricity in Life, is useful to understand the universality and particularity of a local science museum. Beginning with the small collections at the medical device company, the Bakken Museum has expanded its scope and facilities by reidentifying its mission from research institute to educational center. The educational turn of the Bakken Museum has been completed with two remarkable events: the launch of the Summer Institute in 1984 and the construction of the new education facility, New Wing, in 1999. During this change, the museum staff developed unique strategies for public engagement, using the history of science and technology as an educational tool. The shift of the Bakken Museum's mission provides an excellent example of how a local museum could meet the social needs for museums to be educational centers by utilizing its history and collections.

A Study on the Structural Analysis of the Spindle of Swiss Turn Type Lathe for Ultra Precision Convergence Machining (초정밀 융합가공을 위한 주축이동식 자동선반의 구조해석에 관한 연구)

  • Park, Myung-Kyu;Lee, Bong-Gu
    • Journal of the Korea Convergence Society
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    • v.9 no.5
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    • pp.145-150
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    • 2018
  • In the machine tool spindle, various tasks ranging from roughing to finishing must be possible, and the functions of constant speed movement or rotation positioning must be performed. Therefore, there are many variables to be considered in the spindle design. The Swiss Turn Type spindle automatic lathe is a good machine tool for working pins with thinner shafts than a fixed automatic lathe. The Swiss Turn Type spindle is mainly used for precision machining of small products, so the machining precision should be high. The maximum outer diameter limit shall be Ø32 and the inner diameter limit shall be Ø6. In this study, the static and dynamic characteristics of the SCM440 material used in the spindle type automatic lathe were analyzed by applying it to the Swiss turn type spindle automatic lathe. Numerical analysis was used to obtain optimal design technique with high speed and high accuracy considering the factors affecting the static and dynamic characteristics of the spindle.

A Study on Characteristic of Spiral Inductor with Patterned Ground Shield (패턴드 그라운드 쉴드를 적용한 나선형 인덕터 특성 연구)

  • Ko, Jae-Hyeong;Kim, Hyeong-Seok
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.272-273
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    • 2007
  • This paper presents the characteristic of rectangular and octagonal spiral inductor using PGS(Patterned Ground Shield). We investigated variation of inductance and Q-factor with changing of turn number at fixed width, spacing and inner diameter. We confirmed that characteristic of inductance and Q-factor be appled PGS in rectangular and octagonal types spiral inductor by EM simulation tool. Inductance decreased irrespective of structure but Q-factor increased. When PGS not exist, Q-factor of Inductor is analogous at classification frequency but, rectangular is a few larger then octagonal in small turn number. The other side, When PGS is inserted, we confirmed that octagonal lager then rectangular in many turn number. Q-factor is improved in case of octagonal structure and small turn number by PGS effect.

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The Effect of Surface Roughness on Cutting Tool Shape in CNC Lathe C-Axis Turn-mill Machining (CNC선반 C축 Turn-mill 가공에 있어서 절삭공구형상이 표면 거칠기에 미치는 영향)

  • Lee, Soon-kwan
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.16 no.4
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    • pp.62-68
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    • 2017
  • Since the aircraft parts industry is a high-value-added industry, mass production order production, and the hundreds of thousands. Therefore, parts produced However, since these parts require high reliability and stability, a high degree of precision is required. In Korea, there on the roughness of the machined surface in cutting process. However, research on the surface roughness characteristic obtained by which is widely used for aircraft parts is still insufficient in Korea. The purpose of this study is to investigate the effect of turning tool rotation speed and X axis feed rate on the surface roughness of cutting tools in CNC lathes during cutting of aluminum alloy 7075.

Estimation of Tool life by Simple & Multiple Linear Regression Analysis of $Si_3N_4$ Ceramic Cutting Tools (회귀분석에 의한 $Si_3N_4$세라믹 절삭공구의 공구수명 추정)

  • 안영진;권원태;김영욱
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.13 no.4
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    • pp.23-29
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    • 2004
  • In this study, four kinds of $Si_3N_4$-based ceramic cutting tools with different sintering time were fabricated to investigate the relation among mechanical properties, grain size and tool life. They were used to turn gray cast iron at a cutting speed of 330m/min and depth of cut of 0.5mm and 1mm in dry, continuos cutting conditions. Multiple linear regression model was used to determine the relations among the mechanical property, grain size and the density. It was found that the combination of hardness and fracture toughness showed a good relation with tool life. It was also shown that hardness was the most important single element for the tool life.

A Study on the Development of Feature-Based NC Part Programming System 'FeaTURN' for Turning Operation (특징형상을 이용한 NC선반가공 프로그래밍 시스템 'FeaTURN'의 개발에 관한 연구)

  • 강신한;이재원
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.17 no.1
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    • pp.38-45
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    • 1993
  • The feature based modeling approach is useful for post-CAD related works such as process planning and NC part programming. This paper describes the development of 'FeaTURN' system which is feature based NC part programming system for turning operation. The programming task in 'FeaTURN' system becomes easy and effective with the assistance of feature icons. The manufacturing attributes can be handled toghther with the features during input procedure. The cutter location data (CLD) is determined by the processor module. The post process module converts the CL data to machine control data (MCD). Also, the system graphically displays the tool path.