共查询到19条相似文献,搜索用时 484 毫秒
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作者们基于以下研究提出了精磨蜗杆的螺旋蜗杆传动的计算机设计和分析方法。1.滚刀的理论螺线表面是用一维面生成的。2.蜗杆表面与滚刀螺线表面相比齿廓和轴向为凸面。3.蜗杆的双凸面可局部承受接触和获得给定范围的传动误差的预先设计的抛物线函数。蜗杆传动的计算机设计可以显示和避免蜗杆齿面形成奇异点和齿棱。模拟双凸面蜗杆和蜗轮齿面的啮合和接触来确定支承接触轴线不对中和传动误差的影响。开发和应用数值解的计算机程序。数值计算实例说明所提供的开发原理。 相似文献
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黎上威 《机械工人(冷加工)》1982,(1)
环面蜗杆传动过去称为球面或弧面蜗杆传动,其外形为圆环面中的一部分(内环面),如图1所示。环面蜗杆与它基本一致的滚刀滚切的蜗轮配合所组成的传动,叫做双包围环面蜗杆传动。这种传动,在正确设计和制造时,可以实现多齿接触、双接触线以及最有利于形成动压油膜的接触状态。因而 相似文献
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无侧隙双滚子包络环面蜗杆传动的参数优化 总被引:5,自引:0,他引:5
无侧隙双滚子包络环面蜗杆传动是一种能同时满足高精度、大载荷要求的新型环面蜗杆传动.为获得啮合性能优良的无侧隙双滚子包络环面蜗杆传动,提出综合考虑传动齿面接触性能和润滑性能对该新型传动的几何参数进行优选.通过对蜗杆副齿面啮合参数如诱导法曲率、卷吸速度、润滑角以及滚子自转角等的数值计算,分析表征传动啮合性能的齿面接触参数的影响因素,进而确定该新型蜗杆传动优化设计变量的取值范围.以此为基础,建立以蜗杆副的滚子自转角及齿面综合系数为优化目标,建立以传动齿面润滑角、蜗杆轴的强度与刚度以及几何不干涉等为约束的优化设计数学模型,并用Matlab的遗传算法工具箱对数值算例进行求解.数值实例表明,经过几何参数优化的蜗杆传动,其齿面接触性能和润滑性能明显得到改善和提高. 相似文献
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本文将对文[1]提出的一种新型点接触弧面蜗杆传动的研究归结为对蜗杆与滚刀的0~2阶关系的分析,证明了它是一种JK制啮合的蜗杆传动,并得出了避免实体干涉的条件;采用简便而独特的方法分析计算了齿面工作线,两次接触,接触椭圆及齿面接触带;在此基础上还拟定了实用的传动设计方法。文中还附有传动实例的数值计算结果。 相似文献
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作者曾提出新的环面蜗杆传动,即在滚齿机上用球面砂轮磨削环面蜗杆时增加一个螺旋运动,使母面成为圆弧螺旋面,并以平面二包磨头的基础作了大圆弧半径的接触线分析,制造了二包蜗轮副用于拉丝机的主传动上,通过研究用环面砂轮磨削面蜗杆,同样可得到这种传动;并解决了一包传动的母面蜗轮的通用滚刀齿形问题-圆弧螺旋面蜗杆,在本文中除讨论该传动副的接触线,诱导曲率和润滑角外,将研究用滚刀的加工方法、滚刀齿形成形原理及环面蜗杆的双面磨削法。 相似文献
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The design and simulation of meshing of a single enveloping worm-gear drive with modified surfaces is presented. Generally worm-gear is generated by the hob which is identical, to the worm. This process guarantees the conjugation between the worm and the gear but results in a line contact at every instant which is very sensitive to misalignment. The localization of bearing contact is necessary to reduce the sensitivity of the worm-gear drive to misalignment. Practically this localization is achieved by application of an oversized worm type hob to cut the worm-gear. The oversized hob approach is very practical and effective to localize bearing contact but can not provide the conjugation between the worm and the modified worm-gear. This work proposes an analytical procedure to make the worm surface conjugate to the worm-gear which is cut by the oversized hob. The developed computer program allows the investigation of the influence of misalignment on the shift of the bearing contact and the determination of the transmission errors, the contact ratio and the principle curvatures. The developed approach has been applied for ZK type of single-enveloping worm-gear drives and the developed theory is illustrated with a numerical example. 相似文献
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A novel specific type of worm drive, so-called end face engagement worm gear(EFEWD), is originally presented to minimize or overcome the gear backlash. Different factors, including the three different types, contact curves, tooth profile, lubrication angle and the induced normal curvature are taken into account to investigate the meshing characteristics and create the profile of a novel specific type of worm drive through mathematical models and theoretical analysis. The tooth of the worm wheel is very specific with the sine-shaped tooth which is located at the alveolus of the worm and the tooth profile of a worm is generated by the meshing movement of the worm wheel with the sine-shaped tooth, but just the end face of the worm(with three different typical meshing types) is adapted to meshing, and therefore an extraordinary manufacturing methods is used to generate the profile of the end face engagement worm. The research results indicates that the bearing contacts of the generated conjugate hourglass worm gear set are in line contacts, with certain advantages of no-backlash, high precision and high operating efficiency over other gears and gear systems besides the end face engagement worm gear drive may improve bearing contact, reduce the level of transmission errors and lessen the sensitivity to errors of alignment. Also, the end face engagement worm can be easily made with superior meshing and lubrication performance compared with the conventional techniques. In particular, the meshing and lubrication performance of the end face engagement worm gear by using the end face to meshing can be increased over 10% and 7%, respectively. This investigate is expect to provide a new insight on the design of the future no-backlash worm drive for industry. 相似文献
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The ZN-type oversize hob cutter for cutting of worm gears is investigated. The mathematical model of the ZN-type worm gear set is developed based on the cutting mechanism and hob cutter parameters. Influences of oversize hob cutter regrinding, worm-thread number and assembly errors on the bearing contacts and kinematical errors of the ZN-type worm gear set are investigated. A numerical example is given to demonstrate the bearing contacts and kinematical errors of the worm gear set. 相似文献
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为了制造出高精度硬齿面斜齿面齿轮和获得抛物线传动误差并改善啮合性能,对采用碟形砂轮加工双向修形的斜齿面齿轮的磨齿方法进行了研究。设计了渐开线失配的碟形砂轮齿面,分析了碟形砂轮磨削斜齿面齿轮的展成原理,根据展成原理和用渐开线失配的碟形砂轮并改变砂轮的运动,推导出双向修形斜齿面齿轮的齿面方程。给出了双向修形斜齿面齿轮的齿面计算和接触分析实例,结果表明:理论齿面的最大齿面误差为5.98×10-4μm,采用碟形砂轮加工双向修形斜齿面齿轮的磨齿方法是可行的,获得了斜齿面齿轮抛物线传动误差,避免了边缘接触并改善了斜齿面齿轮的啮合性能。 相似文献
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以微分几何与空间啮合理论为基础,推导了锥面二次包络圆柱蜗杆传动两次包络过程中的啮合方程和主要啮合性能指标方程,以图直观的表示出其形状、位置和分布状况。研究发现蜗杆副在砂轮半径一定的变化范围之内,其接触性能和传动啮合性能变化不大,为这类蜗杆传动中蜗轮滚刀的设计制造提供了理论基础。 相似文献
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为了实现面齿轮磨齿加工,采用包络原理对面齿轮磨削蜗杆砂轮齿形进行设计,并对蜗杆砂轮的修整方法进行研究.建立了蜗杆砂轮齿面的包络坐标系;给出了蜗杆砂轮产形面方程;推导了蜗杆砂轮齿廓的曲面方程,利用Matlab软件对蜗杆砂轮齿廓进行了仿真,根据面齿轮磨削蜗杆砂轮的齿面生成原理,给出了修整工具的齿廓形状、齿宽限制以及修整工具... 相似文献
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以蜗杆为母面的二次包络环面蜗杆传动 总被引:2,自引:0,他引:2
刘鹄然 《传动技术(上海)》1996,(1):29-30
本文提出以蜗杆为母面,直接利用现有普通滚刀,在第一次包络时加工出蜗轮和蜗轮同开关的工具齿轮,实际只需加工出一个齿,做成沿螺旋线布刀的装配式刀具,这是一个更为经济而现有刀具不能加工的先进新方法。这种也能实现瞬时双线接触。 相似文献
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针对专用设备头架传动机构上的蜗轮磨损过快问题,用蜗轮齿面的接触疲劳强度计算对蜗轮的磨损进行研究,提出了解决措施:用直廓环面蜗杆传动替代阿基米德蜗杆传动,实践表明此法简单可行,是解决蜗轮磨损问题的良好方法。 相似文献