共查询到19条相似文献,搜索用时 78 毫秒
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随着新产品的开发,对齿轮的承载能力、传动质量和使用寿命的要求日益提高。国内外大量实践证明采用硬齿面齿轮传动,对此有明显作用。采用刮削方法加工硬齿面齿轮是国际上60年代兴起的一项现代先进切削技术。除了可使齿轮承载能力、传动质量和使用寿命有明显提高以外,还可使生产效率明显提高,加工成本大幅度降低,表面质量优于磨齿。且在实际生产应用中取得了良好效果,为大型硬齿面圆锥直齿轮的访形刮创精加工开辟了新的途径。迄今为止,硬齿面齿轮的刮削加工均为圆柱齿轮、弧齿锥齿轮和中、小型圆锥直齿轮,大都采用展成加工法。近年来… 相似文献
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圆锥齿轮的轮齿有直齿、曲齿2种类型。与直齿圆锥齿轮相比,曲齿圆锥齿轮齿面的相对曲率半径较大,承载能力高;轴向重和度大,传动平稳;齿面局部接触对误差敏感性小。所以,曲齿圆锥齿轮应用广泛。 相似文献
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为解决直齿圆锥齿轮的端啮问题,通过对直齿圆锥齿轮进行齿廓修形,提高小端的油膜承载能力,使得载荷沿齿宽方向分布均匀。齿廓修形先采用二次抛物曲线,再改变主动轮和从动轮的齿顶修缘高度,确定修形参数后,建立直齿圆锥齿轮无限长线接触弹性流体动力润滑模型,压力和膜厚采用多重网格法求解,弹性变形采用多重网格积分法求解。齿顶修缘后啮入点的油膜压力比原来小,油膜厚度变大;二次抛物曲线修形后,啮入瞬时点和啮出瞬时点的油膜压力在赫兹接触区明显降低,赫兹接触区的油膜厚度明显增大,沿啮合线分布的最大油膜压力降低,最小油膜厚度增大,中心油膜压力降低,中心油膜厚度增大;修形参数的变化影响修形后的油膜压力和油膜厚度;修形改变了齿宽方向的载荷分布,直齿圆锥齿轮的小端和大端的载荷差距减少,齿面载荷由端部向齿宽中部转移。研究结果说明,齿廓修形可以改善齿轮的润滑状况,提高啮合过程的油膜压力,减少齿面的摩擦和磨损,同时也可以避免齿面胶合的产生。 相似文献
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本文主要介绍,利用仿形原理设计在Y23160伞齿刨上用于加工直齿圆锥齿轮的模板,采用微机设计,解决了模板设计难的问题。该模板在本钢机械设备制造公司应用,效果良好。 相似文献
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In the manufacture of straight bevel gears, a precision forging method has been mainly used in recent years and the precision forging die has been usually manufactured using electric discharge machining. However, it is difficult to content the high productivity and low manufacturing cost using electric discharge machining because the gears are produced through a process of several steps. In this article, a design and manufacture of a straight bevel gear for a precision forging die by direct milling is developed in order to improve the productivity and manufacturing cost for the gear production. The tooth profile of a straight bevel gear generated by a quasi-complementary crown gear instead of a usual complementary crown gear is introduced. For this study, first the numerical coordinates on the tooth surface of the straight bevel gear were calculated and the tooth profiles were modeled using a 3D-CAD system. Afterward, the direct milling of the precision forging die of the straight bevel gear in the hardened state was carried out using a CNC milling machine based on a CAM process through the calculated numerical coordinates. 相似文献
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V. V. Akimov 《Journal of Machinery Manufacture and Reliability》2008,37(4):371-378
A procedure of optimization of the initial contour and normal correction coefficient of bevel gears with circular teeth is proposed. This procedure permits a substantial increase in the geometrical factors of the gear and the load capacity of bevel gears with circular teeth. An algorithm of realizing the optimized initial contour by standard tool heads is suggested. 相似文献
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基于Pro/E的直齿锥齿轮参数化设计 总被引:2,自引:0,他引:2
在Pro/E中,根据机械设计中有关齿轮的设计原理,通过建立直齿锥齿轮中各变量与模数m、齿数z等基本设计参数的关系,实现直齿锥齿轮的参数化设计。更改齿轮的基本设计参数,便能自动生成新的齿轮三维模型,提高了设计效率。 相似文献
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为了满足直齿圆锥齿轮实际生产和设计的需要,根据角度变位直齿圆柱齿轮的计算公式和直齿圆锥齿轮当量齿轮推导出角度变位的计算公式,再利用计算机编程语言VB生成计算程序。实践证明:运用此方法推导出的计算公式是可靠的,且角度变位设计有利于提高齿轮传动质量。 相似文献
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Yi-Pei Shih Ya-Chuan Huang Yi-Hui Lee Jhih-Ming Wu 《The International Journal of Advanced Manufacturing Technology》2013,68(9-12):2499-2515
Face hobbing is a continuous indexing and double-flank cutting process whose high productivity and precision has made it one of the leading methods for fabricating spiral bevel and hypoid gears. The current method is inappropriate, however, for cutting straight bevel gears (SBGs) because it generates extended epicycloidal flanks. Nonetheless, a mathematical model of a face-hobbed SBG was successfully established in earlier research that enables straight cutting paths to cut straight tooth spaces based on a hypocycloidal straight-line mechanism in which the rolling circle radius equals half the base circle radius. This mathematical model, however, is based on a virtual universal cradle-type bevel gear cutting machine that has not yet been developed. This paper therefore proposes another mathematical model of face-hobbed SBG based on a modern six-axis computer numerical control (CNC) bevel gear cutting machine. The six-axis nonlinear machine settings are derived through conversion from the cradle-type machine settings. Meanwhile, the usage of electric gearbox (EGB) for bevel gear cutting is not revealed because of commercial consideration. Therefore, we also provide a solution to use EGB of Fanuc 16i CNC controller. A cutting experiment validates the proposed mathematical models using our developed six-axis CNC bevel gear cutting machine to cut the face-hobbed SBGs. Finally, a flank topographic correction is made that, according to postcorrection simulated topographic errors, can effectively reduce manufacturing errors. This paper successfully implements a face-hobbing process for manufacturing SBGs on a modern six-axis CNC bevel gear cutting machine. 相似文献
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介绍了利用展成加工原理,模拟实际加工过程,实现直齿锥齿轮参数化三维造型的基本思想及具体步骤,为直齿锥齿轮的啮合过程、加工方法、误差分析等提供了强有力的研究工具。 相似文献
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根据切向变位的直齿锥齿轮的结构特点,建立了由实体单元和接触单元构成的一对齿接触的模型。采用基于圣.维南原理的局部优化网格化方法以及局部网格优化方法,建立了更为合理的有限元计算模型。计算结果表明,采用局部网格化方法可以更加迅速和精确的计算含有应力集中现象的模型,同时也为锥齿轮的强度设计提供合理的参考依据。 相似文献