• Title/Summary/Keyword: Gear system

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A Study on the Helical Gear Inspection System for Vehicle Transmission Gear Manufacturing Line (생산라인용 자동차 변속기용 헬리컬 기어 검사 장치에 관한 연구)

  • Lee, Min-Ki;Lee, Eung-Suk;Kim, Ki-Nam;Kim, Kwang-Jung
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.2
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    • pp.237-243
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    • 2010
  • This paper presents a study on the helical gear inspection system for application to vehicle transmission gear manufacturing lines. The special gear profile inspection system is not suitable for manufacturing lines due to the measuring time. The master gear method, which was used in this study and compared with the machined gear in the line, is more efficient and economical. In this paper, three helical gear inspection parameters were of concern: nick, run-out, and PCD (pitch circle diameter) error. To evaluate its influence on the accuracy, the gear measuring system was also studied. This system can be useful in practical vehicle transmission gear manufacturing lines, where imported equipment is currently being used.

Estimation of Damage Condition for the Automobile Transmission Gear by Morphological Analysis of Wear Debris (마멸입자 형태분석에 의한 자동차 트랜스미션 기어의 손상상태 평가)

  • 박흥식;조연상;배효준;이상재
    • Tribology and Lubricants
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    • v.17 no.1
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    • pp.16-21
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    • 2001
  • The wear particles is released from the moving surfaces in gear systems of transmission and its morphology is directly related to the damage and failure to gear system from which the particles originated. It is the effective method for damage condition estimation of automobile transmission gear to observe wear debris in gear oil. We tested with new transmission and took out gear oil according to driving distance. To be applied to damage condition of gear system in transmission of automobile,4 shape parameters of wear particles in gear oil were calculated and wear volume were presumed with the image processing system.

Drop Test Simulation of semi-active Landing Gear using Commercial Magneto-Rheological Damper (상용 MR 댐퍼를 이용한 반능동형 착륙장치 낙하실험)

  • Hwang, Jae-Up;Hwang, Jae-Hyuk;Bae, Jae-Sung;Lim, Kyoung-Ho
    • Journal of Aerospace System Engineering
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    • v.4 no.4
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    • pp.44-48
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    • 2010
  • This paper is used the commercial magneto-rheological(MR) damper for landing gear. The damping characteristics of Commercial MR damper by changing the intensity of the magnetic field are investigated and the dynamic responses of the landing gear. it is set up tset equipment, the landing gear drop test system. The landing gear involved drop testing the gear. The landing gear is tested by implementing sky-hook control algorithm and its performance is evaluated comparing to the result.

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Nonlinear Dynamic Characteristics of Gear Driving System with Tooth Modification (치형수정된 기어구동계의 비선형 동특성 해석)

  • Cho, Yun-Su;Park, Yeon-Sun
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2002.11a
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    • pp.311.1-311
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    • 2002
  • To reduce the vibration of a gear driving system, the modification of gear tooth from the orignal involute gear profile is usually done in gear manufacturers. The quantity of the tooth modification has been decided on the basis of the intereference between two gear teeth during gear meshing and the elastic deformation due to loading. (omitted)

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A Study on the Vibration of 2-Stage Gear System Considering the Change of Gear Meshing Stiffness and Imbalance of Motor (기어 물림부의 스프링강성 변화와 구동기의 불균형을 고려한 2단 기어장치의 진동에 관한 연구)

  • 정태형;이정상;최정락
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.10 no.6
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    • pp.8-14
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    • 2001
  • We develop a method to analyze dynamic behavior off multi-stage gear train system. The example system consists of three shafts supported by ball bearings at the ends of them and two pairs of spur gear set. For exact analysis, the meshing tooth pair of gear set is modeled as spring and damper having time-dependent meshing stiffness and damping. The bearing is modeled as spring. The result of this analysis is compared to that of other model having mean mesh stiffness. The effect of the excitation force by the unbalance off rotor off motor is also analyzed. Finally, the change ova natural frequency of the whole system due to the change of an angle between three shafts is compared in each case, and from this analysis, the avoiding angle for design is advised.

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Profile Shift Coefficient of Gear System Considering Teeth Deflection (변형을 고려한 기어 시스템의 전위 계수 선정)

  • Park, Su-Jin;Yoo, Wan-Suk
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.5
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    • pp.758-763
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    • 2003
  • A profile shifted gear system was analyzed to select the optimum profile shift coefficient, which minimizes gear teeth deflection. Contact force and deformation overlap were calculated by means of FEM and contact theory. The deformation overlap is suggested for an effective indicator to represent the whole deformation of gear system. The optimum value of profile shift coefficients was presented with respect to the deformation of gear system.

A Study on the Automated Design System for Gear (기어설계 자동화 시스템에 관한 연구)

  • Jo, Hae-Yong;Nam, Gi-Jeong;O, Byeong-Gi
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.26 no.8
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    • pp.1506-1511
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    • 2002
  • A computer aided expert system fur spur, helical, bevel and worm gears was newly developed by using AutoiCAD system and its AutoLISP computer language in the present study. Two methods are available for a designer to draw a gear. The first method needs the gear design parameters such as pressure, module, number of tooth, shaft angle, velocity, materials, etc. When the gear design parameters are inputted, a gear is drawn in AutoCAD system and maximum allowable power and shaft diameter are calculated additionally. The second method calculates all dimensions and gear design parameters to draw a gear when the information such as transmission, reduction ratio, nm, materials and pressure are inputted. The system includes four programs. Each program is composed of a data input module, a database module, a strength calculation module, a drawing module, a text module and a drawing edit module. In conclusion, the CAD system would be widely used in companies to find the geometric data and manufacturing course.

Study on the Sizing System of Head Gears (모자업체의 유형별 치수체계에 관한 연구)

  • Lee, Jin-Hee;Do, Wol-Hee
    • Korean Journal of Human Ecology
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    • v.12 no.4
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    • pp.571-578
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    • 2003
  • The purpose of this research was to provide basic information for enhancing sizing suitability in terms of the need for appropriate fit in head gear. The method for this research was to survey about sizing system of head gear, basic measure part, repair service. The subject of this study were 15 head gear companies. The results of this research were as follows : 1. In the sex target analysis according to company type, most of fashion brand companies were producing woman's head gear. In case of the company to produce man's head gear, sizes appeared variously. On the other hand, the sports brand companies were producing unisex head gear and safety helmet companies were producing man's one. 2. The number of size of head gear manufacturing companies were under 3 sizing system. This means that the sizing system of current head gear manufacturing company isn't various. 3. While the measuring part using currently in the company was head girth, one to be considered necessary for manufacturing of head gear except the head girth was head height.

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Structural Analysis of Differential Gear System for Balancing Module Design (Balancing 모듈 설계를 위한 Differential Gear System의 구조해석에 관한 연구)

  • Jang, T.H.;Kim, D.J.;Moon, C.H;Lee, S.J.;Kim, T.G.
    • Journal of the Korean Society for Heat Treatment
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    • v.32 no.6
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    • pp.270-274
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    • 2019
  • In this study, simulation structure analysis was performed for the differential gear system for passenger cars as a prerequisite for the design of the balancing module. The differential gear system was modeled by using CATIA and simulation structure analysis was performed using ANSYS software. The material of the modeled differential gear system uses the mechanical properties of S45C (Q&T). In the structural analysis of the differential gear, the areas where the maximum stress and the maximum strain occurred can be identified. The maximum stress and maximum strain occurred in the pitch circle of the bevel gear. In evaluating the safety factor, it was found that sufficient safety factor was secured. Based on the analysis results for the differential gear, it is expected that it will be a good reference if we design the balancing module device.