共查询到20条相似文献,搜索用时 125 毫秒
1.
2.
3.
通过研究本文提出了一种以网络结点为基础,在齿面上的活动标架里,计算出齿轮处于不同啮合位置时的接触点,以求得接触迹线的新方法,同时可校核在接触点之外,两齿面是否相交干涉。由于以齿面网络结点的离散数据描述齿面,这种方法可用来研究有误差或产生变形的真实齿面的形状和接触迹线,以便进行齿面的接触分析。 相似文献
4.
5.
6.
7.
8.
9.
弧齿锥齿轮齿面啮合点的搜索策略研究 总被引:1,自引:0,他引:1
研究了弧齿锥齿轮啮合点的数值求解方法。以计算结果、精度和速度为指标 ,比较了几种齿面啮合点搜索方法的优劣 ,得到一种综合搜索方法。数值计算结果表明 ,这种方法是十分有效的 相似文献
10.
真实齿面的描述和相啮合齿面各点间隙的计算 总被引:4,自引:0,他引:4
本文提出一种在轮齿两侧面生成对应网络的新方法,利用网络曲线和齿厚的变化描述齿面形状。在齿面上活动标架里,计算出齿轮处于不同啮合位置时,相啮合齿面各点的间隙,可以校核在接触点之外,两齿面是否相交干涉。由于以齿面网络结点坐标的数组描述齿面,这种方法可用来研究有误差或产生变形的真实齿面的形状,进行齿面接触分析。 相似文献
11.
The authors have proposed methods (lead crowning and profile modification) for modifying the geometry of spur gears and investigated the contact pattern as well as the transmission errors to recommend the appropriate amount of modification. Based on the investigation, dynamic load of the modified spur gear drive has been calculated, which is helpful to predict the life of the designed gear drive. Computer programs for simulation of meshing, contact and dynamics of the modified spur gears have been developed. The developed theory is illustrated with numerical examples. 相似文献
12.
展成法大轮准双曲面齿轮点啮合齿面主动设计 总被引:2,自引:0,他引:2
为准双曲面齿轮传动点啮合齿面主动设计建立通用的技术平台对于方便点啮合齿面主动设计的实际应用和更加深入的锥齿轮技术研究都是一项重要的基础工作.基于三轴联动锥齿轮机床建立准双曲面齿轮展成法大轮齿面的通用数学模型.根据点啮合齿面主动设计的原理和方法,在大轮轴截面内描述空间齿面啮合的接触点迹线,推导得到了展成法大轮点啮合齿面主动设计所需要的具体计算公式.这些公式可用于不同展成型式的展成法大轮点啮合齿面主动设计.最后,给出了一个展成法大轮准双曲面齿轮传动点啮合齿面主动设计的算例. 相似文献
13.
14.
本文对范成法加工的渐开线圆柱齿轮,在单对齿啮合受载时,按轮齿危险截面形状(分平截面法和折截面法)、加工方法(分齿条刀类和插齿刀类),给出四组齿形系数的计算式。此式既可计算标准(或非标准)齿轮齿顶受载时的齿形系数,又可计算标准(或非标准)齿轮齿廓任意点受载时的齿形系数,还可计算具有非标准齿廓参数的渐开线齿轮任意点受载的齿形系数,为精确计算轮齿齿根弯曲强度提供了依据。 相似文献
15.
The usual derivations of the well-known fundamental formulae of stereology are unsatisfactory. Precise and general conditions for the validity of a comprehensive system of such formulae are given. They take the form of unbiased ratio estimators of stereological fractions. These estimators are defined for various types of ‘weighted’ random plane and line sections of the specimen. Thanks to certain probabilistic equivalences, these sections may in practice be implemented fairly easily. The system includes new formulae which allow the estimation of the mean lineal and areal projections of embedded features. The mean square errors of several alternative estimators of the same feature characteristics are compared. 相似文献
16.
Envelope-approximation theory of manufacture technology for point-contact tooth surface on six-axis CNC hypoid generator 总被引:1,自引:0,他引:1
Zhou KaihongTang Jinyuan 《Mechanism and Machine Theory》2011,46(6):806-819
A new generation method for point-contact tooth surface is proposed based on the six-axis movement of CNC machine. The new method is derived from the idea of motion of Darboux-Frenet trihedron along a predesigned path of contact on the predesigned (theoretical) tooth surface. The generated tooth surface provided by the new method has tangency of second order with the predesigned (theoretical) surface along the predesigned path of contact and the predesigned (least) warping in regions that differ from the path of contact. This means that the new method can reliably control meshing characteristics at each contact point. In contrast, the previous method can only control meshing characteristics at a mean contact point and make correction by observing the contact-bearing condition to determine meshing characteristics at other contact points. Different from the previous CNC generation method translated from the cradle-style universal hypoid generator, the developed method directly suits the six-axis movement of CNC machine to identify the relative motion between the tool and the workpiece based on the predesigned meshing characteristics of the gear being generated. A numerical example is given to prove that the above-mentioned manufacture method is accurate and feasible. 相似文献
17.
18.
19.
Simulation study on dynamics of cylindrical gear meshing with the evolution meshing stiffness
下载免费PDF全文
![点击此处可从《仪器仪表学报》网站下载免费的PDF全文](/ch/ext_images/free.gif)
《仪器仪表学报》2016,(Z1)
Simulation study on the cylindrical gear meshing with the evolution gear meshing stiffness is being done for better understanding the dynamic characteristics of the kinematics.With consideration of damping,bearing clearance and gear backlash nonlinearity,the dynamic model is set up and computed in MATLAB.The analysis about the relationship between the kinematic responses and the meshing stiffness are carried out.And the results showed that as the gear mesh stiffness is changed from small to large,the performance of the system is changed from the harmonic stable periodic motion to with one times,two times,four times,ending chaos of the stability of the bifurcation.The research results would have theoretical guidance value for the fault diagnosis in engineering. 相似文献
20.
针对双渐开线齿轮传动动态特性问题,通过建立双渐开线齿轮的有限元模型,综合考虑齿面摩擦与齿轮啮合刚度二因素,对双渐开线齿轮传动系统进行了有限元模态分析,运用响应曲面法研究了齿面摩擦与齿轮啮合刚度对双渐开线齿轮振动变形和模态频率的影响;选取不同模态阶数对双渐开线齿轮传动系统进行了动态特性研究,分析了不同模态阶数下双渐开线齿轮的振动变形与模态频率变化状况。研究结果表明,随着齿面摩擦因数与齿轮啮合刚度的增加,不同模态阶数下双渐开线齿轮传动系统各阶振动变形与模态频率均显著增加,齿面摩擦与齿轮啮合刚度对双渐开线齿轮传动动态特性有一定影响,在对齿轮传动系统进行动态特性研究时,必须对齿面摩擦与齿轮啮合刚度进行充分考虑。 相似文献