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渐开线锥形齿轮滚削原理 总被引:2,自引:0,他引:2
基于空间双自由度包络运动理论 ,对渐开线锥形齿轮的滚削原理进行了深入的研究。首先通过分解滚切运动 ,由空间任意点相对速度的啮合接触条件 ,分析了滚刀作平移运动所包络出的产形齿条齿面 ,并求解了其主要参数。进而通过对滚刀、产形齿条及锥形齿轮三者之间空间几何关系的分析 ,从理论上阐明了锥形齿轮的滚齿加工原理并推导了机床调整参数的计算公式。理论和试验的结果表明 ,利用有径向进给运动的通用滚齿机可以实现渐开线锥形齿轮的正确加工 相似文献
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当代先进的双钩型渔网织机中都应用旋转式上钩。上钩上装有一个不能与上钩相对转动的标准模数渐开线直齿圆柱齿轮。一台渔网织机有数百个这样的上钩与齿轮的结合件。它们的轴线互相并行,间距均等,为一整数,且轴线在同一平面内,由一长齿条传递动力,带动齿轮(上钩)转动而完成规定动作(见图1所示)。 由于标准模数齿条的节距总带π因数,而不能使齿轮(上钩)轴线间距ι除以齿条节距的商为整数。这样,齿条与数百个齿轮就无法啮合,所以,必须设计制造节距除齿轮轴线间距ι(一般ι为大于6的整数)的商为整数(即齿条每隔数个整数齿与数百个齿轮啮合)的非标准模数齿条,来解决这个问题。 相似文献
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基于斜齿小齿轮的面齿轮的齿面生成研究 总被引:1,自引:0,他引:1
文中提出了基于斜齿小齿轮的面齿轮传动的两种几何设计方法,一种是利用传统的螺旋渐开线小齿轮的包络原理,另一种是利用由齿条刀具生成的小齿轮的包络原理;推导了两种情况下面齿轮的齿面方程,并讨论了齿宽的限制条件,实现了面齿轮齿面的可视化. 相似文献
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针对一种抽油机换向机构中非完整齿轮-齿条部件,其结构强度关系整机安全性,且齿轮齿条传动会产生振动冲击,影响整机使用寿命,因此,对齿轮齿条传动进行接触分析,并研究齿轮齿条振动冲击的改善方案。利用有限元方法数值模拟齿轮齿条结构强度,分析摩擦对接触强度的影响;基于Adams软件仿真分析接触参数对啮合力突变的影响,提出齿廓修形改善啮合力突变的方案。结果表明,摩擦系数对齿轮齿条接触强度的影响较大,摩擦系数增大,齿面接触强度减小;直线修形渐开线齿廓改善啮合力突变的效果好,同时双圆弧齿廓也能减缓啮合力突变,但啮合力数值较大。研究为后续试验提供了参考依据。 相似文献
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渐开线齿廓基圆展成测量法历来被归属于齿轮单项误差的几何坐标测量法范畴,本文从另外一个视角——齿轮运动几何误差测量理念来探讨它和齿轮整体误差的运动几何测量法之间的关系,认为两者并无本质区别,即均为沿着一条啮合作用线、按照单点啮合创成传动方式,对渐开线齿轮齿廓的几何精度实施测量.二者都应归属于齿轮运动几何测量法的范畴. 相似文献
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渐开线锥形齿轮是齿顶、齿根都带有锥度的渐开线齿轮,它的齿侧面是渐开螺旋面,在垂直干轴线的各个端截面中的齿形都是同一个基圆的渐开线,但各截面中的变位系数不同。 锥形齿轮可以由一个安放在一岁·定位置的齿条包络而成(图2),这个齿条称为产形齿条。由同一个产形齿条包络出来的各个锥形齿轮的基节是相同的,可以相互啮合,所以锥形齿轮传动可以设计成图1所示的各种形式,如平行轴的直齿、斜齿齿轮(图1a,b),相交轴的直齿、斜齿齿轮(图1c,d)交错轴传动(图1e)等。而且,齿轮副中的一个还可以是圆柱齿轮,所以渐开线锥形齿轮能够使用的场合是很广… 相似文献
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Shyue-Cheng Yang 《The International Journal of Advanced Manufacturing Technology》2005,26(5-6):448-456
This paper describes a simple approach based on the gear theory for deriving a helical gear with asymmetric involute teeth. A helical gear with asymmetric involute teeth can be easily obtained through the envelope theory for the one-parameter family of surfaces. The mathematical models for asymmetric helical gears can be provided by the application of two imaginary rack cutters. The investigation on the undercutting analysis of the asymmetric helical gear is studied based on the developed mathematical model and the method of tooth-profile shifting. Here we provide geometric modeling of the designed asymmetric helical gear meshing when assembly errors are present. Stress analysis for the helical and the cylindrical forms are constructed. To illustrate the effectiveness of the approach, an analytical expression of helical gear with asymmetric involute teeth is given. 相似文献
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This paper describes a simple approach based on the gear theory for deriving a helical gear with asymmetric involute teeth. A helical gear with asymmetric involute teeth can be easily obtained through the envelope theory for the one-parameter family of surfaces. The mathematical models for asymmetric helical gears can be provided by the application of two imaginary rack cutters. The investigation on the undercutting analysis of the asymmetric helical gear is studied based on the developed mathematical model and the method of tooth-profile shifting. Here we provide geometric modeling of the designed asymmetric helical gear meshing when assembly errors are present. Stress analysis for the helical and the cylindrical forms are constructed. To illustrate the effectiveness of the approach, an analytical expression of helical gear with asymmetric involute teeth is given. 相似文献
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非对称渐开线斜齿圆柱齿轮作为一种新型的齿轮,目前对其还没有展开详细的研究。从齿轮范成法加工角度出发,根据齿条型刀具上各曲线部分参数,推导求得非对称渐开线斜齿圆柱齿轮端面主动侧、从动侧的渐开线、齿根过渡曲线方程。以轮齿端面曲线方程为基础,结合三维造型软件Pro/E,建立出非对称渐开线斜齿圆柱齿轮的三维模型。由于建立后的齿轮模型已经参数化,通过更改基本参数,可以快速生成需求的齿轮。同时,以建立的模型为基础,结合有限元分析软件,对对称与非对称渐开线斜齿圆柱齿轮两个特殊啮合位置的轮齿齿根弯曲强度进行了分析、比较。 相似文献
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In a given size of symmetric involute gear designed through conventional approach, as the load carrying capacity is restricted at the higher pressure angle due to tipping formation, the use of the asymmetric toothed gear to improve the fillet capacity in bending is examined in this study. Non-standard asymmetric rack cutters with required pressure angles and module are developed to generate the required pinion and gear of a drive with asymmetric involute surfaces and trochoidal fillet profiles. The respective profiles thus generated are optimized for balanced fillet stresses that are equal and possibly the lowest also. For this study of optimization, several non-standard asymmetric rack cutters are designed to accommodate different combinations in the values of pressure angle, top land thickness ratio, profile shift, speed ratio and the asymmetric factors. However for any drive with a given center distance and a speed ratio, only two non-standard asymmetric rack cutters, one for the pinion and other for the gear are used to generate a required numbers of pinion and gear with different cutter shift values for the purpose of optimization. The influence of these parameters on the maximum fillet stress has been analyzed to suggest the optimum values of these parameters that improve the fillet capacity in bending. The optimization of the asymmetric spur gear drive is carried out using an iterative procedure on the calculated maximum fillet stresses through FEM for different rack cutter shifts and finally the optimum values of rack cutter shifts are suggested for the given center distance and the speed ratio of an asymmetric gear drive. Comparisons have also been made successfully with the results of the AGMA and the ISO codes for symmetric gears to justify the results of the finite element method pertaining to this study. 相似文献
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交错轴渐开线锥形齿轮副啮合原理研究 总被引:3,自引:1,他引:3
基于空间啮合理论,在对共轭齿轮副与公共齿条之间啮合关系进行分析研究的基础上,推导了交错轴传动在不同布局形式下,齿轮副安装距、轴间夹角、中心距及公共齿条分度平面上齿线倾斜角等几何参数的计算公式,提出了保证安装参数的锥形齿轮设计方法,为交错轴传动渐开线锥形齿轮副的几何设计打下了理论基础。理论与试验结果表明,推导得到的计算公式,不仅适合于交错轴传动在各种布局形式下的锥形齿轮副设计,同样也适用于平行轴、相交轴等传动类型。最后,通过测试齿轮及实际产品的设计、加工,验证了该研究结果的正确性和实用性。 相似文献
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给出搓齿刀的定义,介绍花键冷搓工艺,并在实际制造搓齿刀具的基础上,总结出了渐开线花键搓齿刀的设计原则及制造工艺,分析影响搓齿花键精度的主要因素,介绍渐开线花键搓齿刀的精度指标,搓齿刀修磨。 相似文献