本文關(guān)鍵詞： 雙圓弧修正擺線齒輪 接觸強(qiáng)度 分形理論 仿真 疲勞壽命　出處：《昆明理工大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：目前,擺線齒輪主要應(yīng)用于鐘表、儀器和儀表中,它具有體積小、無根切、傳動(dòng)平穩(wěn)、重合度大等優(yōu)點(diǎn),更多地被應(yīng)用到一些精度要求很高的場合,尤其在軍械、鐘表等行業(yè)應(yīng)用廣泛。工程中主要使用修正擺線齒輪,目前有三種常用的修正擺線齒輪：鐘表齒輪、雙圓弧修正擺線齒輪及擺線針輪。由于對雙圓弧修正擺線齒輪缺乏系統(tǒng)性的理論研究,本論文將針對雙圓弧修正擺線齒輪的嚙合性能進(jìn)行研究。 雙圓弧修正擺線齒輪的加工特點(diǎn)為：模數(shù)相同,齒數(shù)不同的雙圓弧齒輪,可以用同一把滾刀滾切,使?jié)L刀品種可以減少,大大降低了加工成本。傳動(dòng)特點(diǎn)為：嚙合齒廓為內(nèi)外凸凹圓弧面接觸,其接觸面積大,接觸應(yīng)力小,傳動(dòng)效率高；傳動(dòng)過程中,傳動(dòng)比為定值,傳動(dòng)平穩(wěn)、可靠；側(cè)隙和頂隙較大,傳動(dòng)靈活；齒頂高和齒根高較小,不容易卡滯；輪齒根部有較寬的齒厚,提高了輪齒根部的彎曲強(qiáng)度。 本文首先建立了齒輪齒廓的參數(shù)化數(shù)學(xué)模型,用UG三維軟件建立了齒輪模型。其次,本文主要研究輪齒的接觸性能,傳統(tǒng)的齒輪接觸是建立在Hertz理論上的,Hertz模型是從物體的宏觀特性進(jìn)行研究的,能較正確地反映兩接觸齒輪的應(yīng)力狀態(tài),但沒有考慮接觸體的表面微觀特性,如接觸表面的形貌特征及其表面粗糙度等對接觸強(qiáng)度的影響,而分形理論對齒輪接觸的微觀特性提供了較好的研究,充分考慮到兩齒輪的微觀特性因素。本文將從宏觀和微觀兩個(gè)方面出發(fā)對雙圓弧修正擺線齒輪的輪齒接觸強(qiáng)度進(jìn)行研究,利用分形理論研究齒輪嚙合的接觸強(qiáng)度,利用有限元軟件UG/NAS TRAN進(jìn)行有限元分析；再次,基于FE-safe軟件對齒輪的接觸疲勞壽命進(jìn)行分析,并對疲勞壽命進(jìn)行了預(yù)測；最后,基于ADAMS對齒輪的動(dòng)力學(xué)性能進(jìn)行分析,提取相關(guān)數(shù)據(jù)的圖表進(jìn)行分析。 通過本論文的研究,有助于齒輪加工制造的優(yōu)化設(shè)計(jì),并為實(shí)際加工制造中設(shè)計(jì)效率、產(chǎn)品質(zhì)量及可靠性的提高提供了理論依據(jù),促使雙圓弧修正擺線齒輪更廣泛地應(yīng)用于高接觸強(qiáng)度、高壽命的齒輪傳動(dòng)系統(tǒng)中。
[Abstract]:At present, cycloidal gear is mainly used in clocks, instruments and instruments. It has the advantages of small volume, rootless cutting, stable transmission, high coincidence, and so on. Especially in the ordnance, clock and other industries widely used. The main engineering use of modified cycloidal gear, there are three kinds of commonly used modified cycloidal gear: clock gear. Due to the lack of systematic theoretical research on double circular arc modified cycloidal gear, the meshing performance of double circular arc modified cycloidal gear is studied in this paper. The machining characteristics of double circular arc modified cycloidal gear are as follows: double circular arc gear with the same modulus and different teeth can be hobbed with the same hob so that the variety of hob can be reduced. The characteristics of the transmission are as follows: the tooth profile is internal and external convex and concave arc contact, its contact area is large, the contact stress is small, and the transmission efficiency is high; In the process of transmission, the transmission ratio is fixed, the transmission is stable and reliable; Large clearance and top gap, flexible transmission; The tooth top height and the tooth root height are smaller, not easy to get stuck; There is a wide tooth thickness at the root of the gear, which increases the bending strength of the root of the gear. In this paper, the parameterized mathematical model of gear tooth profile is established, and the gear model is established by UG software. Secondly, the contact performance of gear tooth is studied in this paper. The traditional gear contact model, which is based on Hertz theory, is studied from the macroscopic characteristics of the object, which can accurately reflect the stress state of the two contact gears. However, the influence of the contact surface on the contact strength is not taken into account, such as the morphology of the contact surface and the surface roughness, while the fractal theory provides a better study on the contact microcosmic characteristics of the gear. In this paper, the tooth contact strength of double circular arc modified cycloidal gear is studied from macro and micro aspects. The contact strength of gear meshing is studied by fractal theory, and finite element analysis is carried out by finite element software UG/NAS TRAN. Thirdly, the contact fatigue life of gear is analyzed based on FE-safe software, and the fatigue life is predicted. Finally, the dynamic performance of gear is analyzed based on ADAMS, and the graph of relevant data is extracted for analysis. Through the research of this paper, it is helpful to the optimization design of gear machining and manufacturing, and provides the theoretical basis for the improvement of design efficiency, product quality and reliability in actual manufacturing. The double circular arc correction cycloidal gear is more widely used in the gear transmission system with high contact strength and long service life.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH132.41

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