Designing Pitch Curves of Non-Circular Gears

Medvecká-Beňová, Silvia

doi:10.20858/sjsutst.2018.99.10

Cited by 5 publications

(6 citation statements)

References 5 publications

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“…Çalışılan dişli tertibatının kinematik özelliklerinin, silindirik düz dişliler gibi standart dairesel dişlilere nazaran farklı olduğu ortaya koyulmuştur. Dairesel olmayan dişlilerin, dairesel dişlilerin ve kam mekanizmalarının avantajlarının sentezlendiği ve sürekli değişken oran ile yüksek çıkış gücü ve mükemmel doğruluğun bir kombinasyonunu sunduğu görülmektedir [9]. Bazı çalışmalar, eliptik adım elipslerinin kinematik analizi ve bilgisayar destekli tasarımına odaklanmıştır [10].…”

Section: Eli̇pti̇k Di̇şli̇leri̇n Tasarimiunclassified

Eliptik Dişli Tasarımı, İmalatı, Analizi ve Eliptik Dişlilerin Endüstriyel Uygulamaları

PAZARKAYA

Yazar

ÖZDEMİR

2022

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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The studies covered elliptical gears focus on the design of tooth profiles and the researches increase about prototype manufacturing of elliptical gears. Elliptical gear tooth profile, which is developed based on the fact that the tooth profiles of elliptical gears are not identical to cylindrical gears; It is obtained by shaping tooth flanks with involute curves in accordance with the rolling method on the section ellipse with a rack or cylindrical spur gear cutter. It has been determined that the use of CNC electrical discharge machining (EDM) in the manufacture of elliptical gears has preferably become, also, the manufacturability of elliptical gears in standard modules by developing electronic gearboxes for hobbing machines. Elliptical gear pairs are used into different machines, mechanism and equipments, especially flow meters, and pumps with elliptical gear pairs are seen to be widespread. In today's world, where energy efficiency is of utmost importance, accurate and precise measurement of high fluid amounts and eliminating the losses in the fluid transfer of enterprises are also required. In this review study, the design of elliptical gears, traditional and non-traditional manufacturing methods, strength and vibration analyzes, and various industrial applications in the literature were evoluated and the common result of the literatüre works were obtained. It is predicted that elliptical gears will be an indispensable part of many smart products that contain mechanical parts in the near future.

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Section: Eli̇pti̇k Di̇şli̇leri̇n Tasarimiunclassified

Eliptik Dişli Tasarımı, İmalatı, Analizi ve Eliptik Dişlilerin Endüstriyel Uygulamaları

PAZARKAYA

Yazar

ÖZDEMİR

2022

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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“…Furthermore, he presented the rapid prototyping methods of models of cog belt pulleys with non-circular envelopes, and the evaluation method of manufacturing accuracy of cog belt pulleys, which were applied in uneven running belt transmissions. Medvecká-Be ňová [24] presented the design for the shape of a pitch outline for a specific requirement, that is, continuous change in gear ratio during one rotation. Maláková [25] presented the design of a suitable gear transmission with a continuously changing gear ratio in the range from 0.5 through 1.0 to 2.0 and back during one revolution of intermeshing gears, according to demands specified for a practical application.…”

Section: Introductionmentioning

confidence: 99%

Design and Application of Non-Circular Gear with Cusp Pitch Curve

Liu

Tong

et al. 2022

Machines

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To solve the design problem of non-circular gears with cusp pitch curves, this paper proposed a new variable-involute and incomplete variable-cycloid composite tooth profile (VIIVC-CTF), deduced the new VIIVC-CTF mathematical model, and constructed the conjugate gear model based on the envelope method. The design software of the non-circular gear with a cusp pitch curve was developed based on MATLAB. The variation law of rolling radius on an incomplete cycloid profile and its characteristics such as pressure angle and radius of curvature were analyzed. The variation relationship of the rolling radius on the meshing line and the contact ratio of the VIIVC-CTF were studied. The variation relationship of incomplete variable-cycloid profile shape, pressure angle, and curvature radius corresponding to different elliptical eccentricities were analyzed. The meshing analysis of the non-circular gear transmission mechanism was carried out based on virtual software. A comparison of the consistency of the theoretical value and simulation value of the transmission ratio curve verified that the tooth profile design method was feasible, and the VIIVC-CTF was applied to the seedling pick-up mechanism of the non-circular gear planetary gear train. Through the seedling picking experiment of the seedling pick-up mechanism, the feasibility of the application of the VIIVC-CTF was verified.

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“…A change of gear parameters, making wheels in higher accuracy classes, the use of bevel teeth instead of straight ones, the use of high teeth [13,14,15,16,17]. The use of favorable bearing methods to dampen the dynamic actions transferred from shafts to bearing housings (use of slide bearings instead of rolling bearings) [18,19,20,21,22]. Shaping of the gear housing in order to minimize vibration at a preset forced gearing [1,23,24,25].…”

Section: Introductionmentioning

confidence: 99%

“…The use of favorable bearing methods to dampen the dynamic actions transferred from shafts to bearing housings (use of slide bearings instead of rolling bearings) [18,19,20,21,22].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Selected Operational Factors on the Vibroactivity of Upper Gearbox Housings Made of Composite Materials

Figlus

Kozioł

Kuczyński

2019

Sensors

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This paper presents the results of laboratory tests in which evaluation was performed regarding the effect of selected operating factors on the vibroactivity of upper gearbox housings made of three different fiber reinforced polymer composite materials with diverse layouts (cross and random) and types of reinforcing fibers: glass fiber and carbon fiber. The results of tests for composite housings were compared with those for a steel housing. The tests showed that composite housings had a weight lower by more than 60% compared to the steel housing. A multisensor measuring system consisting of vibration acceleration transducers, a directional microphone and a data acquisition card with software was used for the study. Tests of the vibroactivity of upper gear housings were carried out at different loads and rotational speeds of toothed gears. The study showed that composite housings are less sensitive to changes in the rotational speed that steel housings. The tests showed that at a higher rotational speed of the gear transmission, housings made of composite materials had a comparable or lower level of vibration. Tests and analyses of the vibroactivity of housings performed at different loads of the gear allow the conclusion that composite housings, despite a considerably lower weight than steel housings, are less sensitive to changes in the load of the gearing.

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Designing Pitch Curves of Non-Circular Gears

Cited by 5 publications

References 5 publications

Eliptik Dişli Tasarımı, İmalatı, Analizi ve Eliptik Dişlilerin Endüstriyel Uygulamaları

Eliptik Dişli Tasarımı, İmalatı, Analizi ve Eliptik Dişlilerin Endüstriyel Uygulamaları

Design and Application of Non-Circular Gear with Cusp Pitch Curve

The Effect of Selected Operational Factors on the Vibroactivity of Upper Gearbox Housings Made of Composite Materials

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