• 제목/요약/키워드: gears

검색결과 813건 처리시간 0.027초

베벨기어 제조 공정에서 베벨기어의 정도 및 급수에 미치는 인자 (Factors affecting accuracy or grade of bevel gears during manufacturing)

  • 전병윤;엄재근;박정휘;전만수
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2008년도 추계학술대회 논문집
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    • pp.405-409
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    • 2008
  • In this paper, factors affecting accuracy or grade of forged bevel gears are investigated in the experimental way. Two materials of SKD-11 and copper. two machining conditions and two machines of WIA-V50 and Roders-RFM600 are particularly investigated to reveal their effects on the grade of bevel gear forging dies in this study. It has been shown that the bevel gear grades are much affected by all the factors tested, revealing that it is of great significance to find the optimal machining process of die making to develop or manufacture a high precision bevel gear and that the bevel gear is degraded by one from the grade of its related die during forging.

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기어 부품의 검사시스템 개발에 관한 사례 (A Case Study on Developing a Checking System of Gear Parts)

  • 윤태홍;변재현
    • 산업공학
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    • 제21권4호
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    • pp.378-384
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    • 2008
  • Small sized companies have not been successful in systematically applying statistical process control because of insufficient human resources. In this paper we present a case study of automatic checking system for a small sized company which produces various types of gears. A systematic way of automatically measuring gears is proposed and statistical analysis methods are presented. To reduce variation in the measurement data, a standard operating procedure is also proposed. This case study can be helpful to quality assurance practitioners of small sized companies who are willing to develop checking or inspection systems for their products.

Diagnosis in Beding Fatigue of Spur Gear Teeth

  • Sentoku, Hirofumi;Tokuda, Takashi
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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    • pp.307-311
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    • 1993
  • Research concerning gears included in rotating machines has been reported using the acoustic emission (AE) method, however, almost no research has been conducted using the AE method in regard to running gears in a bending fatigue processor spur gear teeth. Therefore, in this report, a power circulating-type gear testing machine was used and AE signals and crack length were measured in the bending fatigue process of case-hardened spur gear. Furthermore, the envelope of the AE signal was detected and various analysis were carried out in this data. In the course of the experiments, the following results were observed : the AE signal envelope consists mainly of contact frequency component and twice as many as this;two peaks of AE appear in each tooth contact by the tip corner contact ; as a result of the severe tip corner contact ; as a result of the severe tip corner contact with the sudden increase of crack length, AE signal becomes large.

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박육직교축 치차의 설계에 관한 기초적 연구 (Study on the Design of Thin Intersected Axe Gear)

  • 장지연
    • Journal of Advanced Marine Engineering and Technology
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    • 제17권3호
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    • pp.80-87
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    • 1993
  • The various configuration of thin-shaped bevel gears are used usually for such as main reduction gear of the hovercraft. But the reasonable and concise guide to thedesign of the se bevel gears is not yet obtained, since the tooth of bevel gear has complex form. The purpose of these investigation is to be establish the design guide and to propose the desirable configuration form for thin-shaped straight bevel gear. In this report, the desirable configuration is examined experimentally by clearing up the effect of web and rim thickness, rim support condition upon the load distribution and root stress distribution along the tooth trace. The results are summarized as follows. (1) The crowning of tooth trace exerts a significant effect on the root stress distribution of thin-shaped bevel gear. (2) As the desirable configuration of the thin-shaped bevel gear, it is to be recommended that the rim is supported at the heel side of tooth trace. (3) But, as special type, it is desirable that the rim is supported at the toe side.

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가속수명시험 모델에 따른 평기어의 신뢰성 해석 (Reliability Analysis of the Spur Gear with Accelerated Life Testing Model)

  • 김철수;권여현;김주형;김정규
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2004년도 추계학술대회
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    • pp.136-141
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    • 2004
  • The gear in various mechanical components easily occurs at damages by the external torque. The main failure modes of the gear are surface pitting with the tooth surface and breakage with tooth root by caused fatigue. Therefore, the gear is very important role in the reliability research since it may cause fatal damage of entire system such as the gear box in automobile transmission. In this study, the failure mode of the gear was analyzed and accelerated durability analysis was employed for the life estimation of spur gears. In the case of assumed load spectrums, the reliability of spur gears was evaluated by inverse power law-Weibull accelerated life test model with cumulative damage exposure.

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SEM을 이용한 나일론피니언의 마멸특성 고찰 (Investigation about the Wear Characteristics of Nylon Pinions Against Steel Gears by SEM)

  • 김충현;안효석;정태형
    • 대한기계학회논문집A
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    • 제26권6호
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    • pp.1159-1168
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    • 2002
  • Power-transmission Nylon pinions against steel gears fur different pitch line velocities was studied with a power circulating gear test rig under unlubricated condition by SEM(Scanning Electron Microscope). The wear characteristics of Nylon pinions varied significantly with the pitch line velocity and applied load. Wear occurred most severely at the regions including pitch circle and root circle of Nylon pinions. It is confirmed that Nylon pinions are able to be used fer power-transmission under limited conditions.

저소음 Axle 개발을 위한 디플렉션 Test에 대한 연구 (Deflection Test for Low Noise Axle)

  • 최병재;박순관;이강현;조윤경;전성하
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 추계학술대회논문집
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    • pp.1391-1394
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    • 2007
  • In order for Hypoid gear development. Gears are required to sustain heavy loads or on applications where the gear box is made or a material with a different coefficient of thermal expansion form that or the gears and shafts, it is desirable to make a deflection and contact check under load. The deflection test is performed in the actual gear mounting using completely processed gear. This test should cover the full operating range of gear loads from no load to peak load. Under peak load the contact pattern should extend to the tooth boundaries without showing a concentration of the contact pattern at any point on the tooth surface.

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