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首页> 外文期刊>Journal of manufacturing science and engineering: Transactions of the ASME >Generation of Noncircular Spiral Bevel Gears by Face-Milling Method
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Generation of Noncircular Spiral Bevel Gears by Face-Milling Method

机译：端面铣削法生成非圆弧齿锥齿轮

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摘要

Noncircular bevel gears are applied in variable-speed transmissions with intersecting axes. Since dedicated machines for manufacturing noncircular bevel gears are not available, noncircular bevel gears are normally manufactured using universal computer numerically controlled (CNC) machining centers, resulting in poor productivity. This paper describes a face-milling method for generation of noncircular spiral bevel gears, which is analogous to the generation of spiral bevel and hypoid gears using CNC hypoid gear generators, such as Gleason free-form hypoid generators. As a result, the productivity is significantly improved. Based on the theory of gearing, this paper first describes the basic concept of generation of conjugate noncircular spiral bevel gears. Generation of the tooth surfaces using crown-gear generation concept is analytically discussed with association to the face-milling process of generation of the proposed noncircular spiral bevel gears. The tooth surface geometries are represented by the position vectors and normals. The kinematical model of free-form machines is developed. The machine motion parameters are determined based on the theoretically defined tooth surfaces using the crown-gear generation concept. The developed method is verified by manufacturing a real pair of noncircular spiral bevel gears with satisfactory contact patterns which agree well with those modeled using a commercial CAE software program.
机译：非圆形锥齿轮适用于具有相交轴的变速传动装置。由于没有用于制造非圆形锥齿轮的专用机器，因此通常使用通用计算机数控（CNC）加工中心来制造非圆形锥齿轮，这会导致生产率下降。本文介绍了一种用于生成非圆形螺旋锥齿轮的端面铣削方法，该方法类似于使用CNC准双曲面齿轮发生器（例如Gleason自由形式双曲面双曲面发生器）生成螺旋锥齿轮和准双曲面齿轮。结果，生产率显着提高。本文基于齿轮理论，首先介绍了共轭非圆弧齿锥齿轮的基本概念。结合提出的非圆形螺旋锥齿轮的端面铣削过程，分析了使用冠齿轮生成概念生成齿面的方法。牙齿表面的几何形状由位置矢量和法线表示。建立了自由形式机器的运动学模型。机器运动参数是根据理论上定义的齿面使用冠齿轮生成概念确定的。通过制造一对具有令人满意的接触模式的非圆形螺旋锥齿轮的真实方法，该方法与使用商业CAE软件程序进行建模的方法相吻合，从而验证了所开发的方法。

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