共查询到17条相似文献,搜索用时 390 毫秒
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以全展成法加工的摆线齿锥齿轮为研究对象,以获得中部较平坦的高阶传动误差曲线为目标,提出了一种齿廓修形方法,即将刀廓曲线设计为四阶曲线,而不改变切齿过程中产形运动关系,在传统的机械摇台式机床上即可实现齿廓修形.利用优化算法对修形齿面进行了数值计算,并进行了齿面修形数值仿真.在建立摆线齿锥齿轮啮合数学模型的基础上,对修形齿面进行了齿面接触分析.算例分析表明,通过合理选取各阶修形系数可以获得高阶传动误差曲线和所需的齿面接触印痕.与传统的抛物线形状传动误差相比,高阶传动误差曲线幅值小,转换点处两切线夹角大,能有效减少齿轮副在轻载运行下的振动和冲击、降低噪声. 相似文献
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螺旋锥齿轮振动研磨的运动模型研究与分析 总被引:5,自引:3,他引:5
首次提出螺旋锥齿轮振动复合研齿法 ,建立了V/H与齿面啮合关系的数学模型与振动研齿法的运动学模型。利用TCA方法 ,通过对齿面的接触路径与印痕、齿面相对运动速度与研磨轨迹、切削速度数值仿真 ,证明该模型能对齿面研磨中接触路径与印痕进行准确的控制 ,振动研磨加工的质量效率明显优于传统方法 相似文献
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通过齿面点离散的方法,评判机床调整参数误差对螺旋锥齿轮齿面误差的影响程度,进一步分析齿面形状变化趋势,指出了由于齿面误差引起啮合区位置偏移,从而导致的不良啮合状态,为机床误差补偿及提高螺旋锥齿轮的制造精度提供了依据. 相似文献
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Dynamic analysis of involute spur gears with asymmetric teeth 总被引:1,自引:0,他引:1
Fatih Karpat Stephen Ekwaro-Osire Kadir Cavdar Fatih C. Babalik 《International Journal of Mechanical Sciences》2008,(12):1598-1610
New gear designs are needed because of the increasing performance requirements, such as high load capacity, high endurance, low cost, long life, and high speed. In some applications, such as in wind turbines, the gears experience only uni-directional loading. In these instances, the geometry of the drive side does not have to be symmetric to the coast side. This allows for the designing of gears with asymmetric teeth. In previous studies related to bending stress and load capacity, high performance has been achieved for gears with asymmetric teeth. These gears provide flexibility to designers due to their non-standard design. If they are correctly designed, they can make important contributions to the improvement of designs in aerospace industry, automobile industry, and wind turbine industry. At high operation speeds, there is always a concern of dynamic loads and vibrations of equipment. Therefore, there is a need to fully understand the dynamic behavior of gears with asymmetric teeth. Thus, the primary objective of this paper is to use dynamic analysis to compare conventional spur gears with symmetric teeth and spur gears with asymmetric teeth. The secondary objective is to optimize the asymmetric tooth design in order to minimize dynamic loads. This study offers preliminary results to designers for understanding dynamic behavior of spur gears with asymmetric teeth. For this study, a dynamic model was developed, using MATLAB, and used for the prediction of the instantaneous dynamic loads of spur gears with symmetric and asymmetric teeth. Furthermore, a 2-D three-tooth model was developed for finite element analysis. Fast Fourier transform was used for the frequency analysis of the static transmission errors. It is shown that generally, the dynamic factor, for spur gears with asymmetric teeth, increases with increasing pressure angles on the drive side. For asymmetric teeth, increasing the addendum leads to a significant decrease in the dynamic factor. The static transmission error, at the center of the single tooth contact zone, decreases with increasing pressure angle. The first two harmonics slightly increase with increasing pressure angle. It is further shown that the amplitudes of harmonics of the static transmission errors are significantly reduced when asymmetric teeth with long addendum providing high gear contact ratio close to 2.0 are used. 相似文献
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对渐开线齿轮动态力研齿进行了理论分析和试验研究。基于以研代磨的设想,齿轮动态力研齿将研磨工艺用于硬齿面精加工,其加工原理为:两工件齿轮(两被研齿轮)在空载下以确定的速比(两齿轮的齿数比),在大转动惯量下高速稳态运转,研齿时保持两齿轮的速比不变,并周期性改变两齿轮的中心距,利用齿轮啮合时,齿轮本身误差产生的齿面动态力在研磨剂的作用下,修整齿轮误差达到两齿轮提高精度的目的。 相似文献
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提出了超声研磨加工螺旋锥齿轮的理论与方法,利用声弹性理论分析了超声波在齿面传播与反射的机理。超声研齿的材料去除以塑性流动去除为主,机理可归结为磨粒锤击微切削、弹跳冲击与研磨液空化效应。试验证明,超声研齿的材料去除率为普通研齿加工的3倍,且齿面质量明显提高,齿面粗糙度Ra为0.2μm,水平截距c为1.2μm。最优工艺参数组合中转矩为0.12 N.m、转速为600 r/m in、研磨剂浓度为20%,其中转矩对材料去除率的影响最为显著,达到68.11%;其次为转速。对最优工艺参数组合所作的验证试验,材料去除率MRR指标与预测值基本相符。 相似文献
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分析了研齿对准双曲面齿轮副动态性能的影响机理。基于现场研齿试验,对不同转速、载荷下齿轮副啮合振动、噪声进行了对比试验。由振动、噪声频谱图的对比分析可知,研齿对齿轮副动态性能具有明显的改进作用。 相似文献
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A method of finishing a highly accurate external gear with lapping, from both the experimental and theoretical points of view, is discussed. First, the external gear is meshed with the lapping tool, which acts as an internal gear having the same number of teeth and the same tooth-profile as the work. The lap is reciprocated in the direction of the gear axis and is then turned at a certain angle, so as to change the meshing teeth, and lapping is repeated. In a similar manner, the lapping action is repeated, changing the meshing teeth, and the accumulative pitch error is decreased.The aim is to make a highly accurate worm wheel (plane-tooth-profile) as basic research for the study of an indexing table which is assembled with Wildhaber worm gears. The experiment was tried on a worm wheel having an outside diameter 292 mm and 72 teeth. The maximum accumulative pitch error was decreased from 15 sec (10.5 μm) to 3.15 sec (2.2 μm). Thus we obtained a highly accurate worm wheel for practical use 相似文献
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对渐开线齿轮动态力研齿进行了理论分析和实验研究。基于以研代磨的设想,齿轮动态力研齿将研磨工艺用于硬齿面粉加工,其加工原理为,两被研齿轮在空载下以确定的速比,大转动惯量下高速稳态运转,研齿时保持速比不变,并周期性改变两齿轮的中心距,利用齿轮啮合时齿轮本身误差产生的齿面动态力,在研磨剂的作用下,修整齿轮误差达到两齿轮提高精度的目的。 相似文献