• Title/Summary/Keyword: 기어치형

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전위기어의 성능 및 강도설계

  • 박재춘
    • Journal of the KSME
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    • v.25 no.1
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    • pp.9-22
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    • 1985
  • 재래의 표준기어방식으로는 여러 가지의 취약점이 있는데, 이러한 결점은 치형을 다시 교 정(correction)하는 전위기어방식으로 설계하여 성능이 개선되고 해결될 수 있다. Corrected tooth의 창성은 공구를 전위하여 절삭하므로 이루어지고, 이 방식은 치형곡선의 곡률반지름을 증가시키며, 미끄럼률을 감소시켜서 강도를 증가시키도록 설계할 수 있다. 본 해설에서는 전위 기어 영역에서 기어의 성능개선과 복잡한 강도의 설계방법등을 최근경향에 부합시키고 통일된 형식의 체계로 기어설계를 쉽게 발전시킬 수 있도록 시도한 것이다.

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Contact Fatigue Life for CRG System (CRG 시스템의 접촉 피로수명)

  • Nam, Hyoung-Chul;Kim, Chang-Hyun;Kwon, Soon-Man
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.11
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    • pp.1391-1397
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    • 2012
  • A cam ring gear (CRG) system based on a hypotrochoid curve consists of a pinion with roller teeth and its conjugated internal CRG. In this study, we investigated contact forces, contact stresses, and load stress factors to predict the surface pitting life using an exact CRG profile by introducing the profile modification coefficient. The results show that the pitting life can be extended significantly by increasing the profile modification coefficient without any other change of parameters in the CRG system.

Tooth Form Design of Involute Gear Type External Gear Pump (Involute 기어형식의 외접기어펌프 치형 설계)

  • Shim, Bo-Mi;Choi, Min-Han;Ahn, Jin-Woo;Che, Woo-Sung
    • Proceedings of the KIPE Conference
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    • 2011.07a
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    • pp.539-540
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    • 2011
  • 본 논문에서는 건설기계 및 운반기계, 차량의 유압장치(브레이크, 클러치 및 파워 스티어링 시스템)로 널리 사용되어지고 있는 외접기어펌프의 치형을 Involute 기어형식으로 설계하였다. 상용프로그램인 Pumplinx 프로그램을 통해 이 기어를 해석하여 효율 및 성능을 알아보았다.

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A Study on Composite Tooth Profile Generation of Involute and Circular Are (인벌류우트 - 圓孤 合成齒形의 創成 에 대한 硏究)

  • 최상동;변준형;윤갑영
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.9 no.5
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    • pp.572-578
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    • 1985
  • A composite gear with involute-circular are tooth profile and a tooth profile of the rack to cut this gear are theoretictically obtained. The composite gear has involute tooth profile in the vicinity of pitch point and has circular arc tooth profiles at addendum adn dedendum. The contact ratio(M$_{c}$), chordal tooth thickness (chordal tip tooth thickness S$_{t}$, chordal root tooth thickness S$_{t}$) of the composite gear are compared with those of involute gear. When module, number of teeth and pressure angle eqaul, S$_{t}$ of composite gear is much larger than that of involute gear. Under the same conditions, S/sib t/ and M$_{c}$ of composite gear become smaller than those of involute gear.lute gear.

A Study on The Tooth Creating Algorithms of The Cycloid Curve Gear and The Third Polynomial Curve Gear (사이클로이드 곡선 및 3차 다항식 곡선기어의 치형 설계에 관한 연구)

  • 최종근;윤경태
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.11 no.3
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    • pp.80-85
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    • 2002
  • The free curve gear is a non-circular gear without any relating center, which can perform free curve motion for complicated mechanisms, and minimize the work area. In this study, an algorithms for tooth profile generation of free curve involute gear is developed. The algorithm uses the involute gear creating principle in which a gear can be generated by rolling with another standard involute one. Cycloid me and third polynomial curve gears were designed and verified by computer graphics. These gears are manufactured in the wire-cut EDM and examined in engagement with a standard spur gear. The results showed that the proposed algorithm is successful to design and to manufacture the free curve gear with concave and convex profiles.

A Stress Analysis on the Involute-Circular Arc Composite Tooth Profile Gear (인벌류우트-圓弧 合成齒形기어의 應力解析)

  • 탁계래;최상훈;윤갑영
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.11 no.2
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    • pp.198-204
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    • 1987
  • In a new involute-circular arc tooth profile which is composed of an involute curve in the vicinity of pitch point, a circular arc in the addendum part, and a curve in the dedendum part which is generated by the circular arc profile of mating gear tooth profile, the tooth contact stress is calculated analytically and the root fillet stress is calculated by the finite element analysis. The root fillet stress and the Hertzian contact stress of composite tooth profile gear are decreased with increasing the pressure angle and with decreasing the radius of circular arc and unwound angle. Compared with the standard involute gear, the root fillet stress is decreased by 2-15% and the Hertizian contact stress is decreased by 6-24%.

A Development of Tooth Profile Modification for Spur Gear (스퍼기어의 치형수정 프로그램의 개발)

  • Hwang, Jin-Young;Hwang, Sung-Wook;Kim, Tae-Wan;Cho, Yong-Joo
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 2002.05a
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    • pp.259-266
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    • 2002
  • The basic concept of 'tooth profile modification' is to change a part of the involute profile to reduce the load in that area and appropriate profile modifications can help gears to run quietly and resist scoring, pitting and tooth breakage. In this study, the modification of tooth profile to make a smooth transmission of the normal loads in spur gears has been developed. The modified tooth profile has been determined by the total deflection at contact points. We use the AGMA Standard to design basic gear profile, We also developed a gear design Program using tooth profile modification

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Development of Spur Gear Design Software using Tooth Profile Modification (치형수정 기술을 이용한 스퍼기어설계 소프트웨어의 개발)

  • Kim, Tae-Wan;Hwang, Jin-Yeong;Jo, Yong-Ju
    • Journal of the Korean Society for Precision Engineering
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    • v.19 no.10
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    • pp.202-211
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    • 2002
  • The basic concept of 'tooth profile modification' to change a part of the involute profile to reduce the load in that area and appropriate profile modifications can help gears to run quietly and resist scoring, pitting and tooth breakage. In this study, the modification of tooth profile to make a smooth transmission of the normal loads in spur gears has been developed. The modified tooth profile has been determined by the total deflection at contact points. We use the AGMA Standard to design basic gear profile. We also developed a gear design program using tooth profile modification.

An Investigation on the Method of Tooth Modification for Noise Suppression of Gear Transmission (기어 변속기의 소음저감을 위한 치형수정 설정방법에 관한 고찰)

  • Bae, M.H.;Park, N.G.
    • Transactions of the Korean Society of Automotive Engineers
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    • v.6 no.6
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    • pp.243-251
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    • 1998
  • A method of establishing the tooth modification for gear transmission of vehicles to reduce gear whine noise, caused by tooth impact phenomenon of mating gear, is introduced. The major causes of tooth impact are due to the deflections of gear teeth and shafts of transmission with the loaded condition including various kinds of manufacturing errors. The theoretical shape of tooth surface to avoid tooth impact is derived by the amount of elastic deformation of gear teeth and shaft and overall manufacturing error of machine tool. The surface function is converted with respect to the conventional commercial data usually communicated to the gear inspection system. The proposed method is applied to the gearbox of four wheel drive vehicle and shows the gear whine noise decreased to the 8 dB in the sound level.

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