通过有限元计算及光弹性实验，结果证明，滚针轴承的接触应力分布与轴承手册和教科书中所给出的公式不符。
After calculating with finite element method and photoelastic-test, it shows that the contact stress distribution is not in keeping with the formulas given by some bearing hand books and textbooks.
并且使受电弓框架垂向位移和侧滚角度足够小，弓网接触压力达到车辆正常曲线通过时的水平。
In the mean time, the vertical and roll motions of the pantograph fame should be as small as possible, so that to make the contact force as normal as the conventional train.
轴承滚针的凸度设计，决定了滚动体与滚道间的接触压力分布，影响其性能和寿命。
Crown Drop of a Needle roller decides the pressure distribution between roller and raceway, capability and life.
通过外花键冷滚压精密成形的变形过程分析及适当假设，建立外花键冷滚精密成形滚压接触面积的数学模型。
The deformation process of external spline cold rolling was analyzed according to the suitable assumption. The mathematic model of contact area of external spline cold rolling was founded.
利用轮齿接触分析与齿轮啮合原理，建立了齿面均匀研磨与定点研磨控制的几何运动模型，经滚检检验，该模型能对齿面研磨位置与侧隙进行较准确的控制。
The rolling tests prove that this setup model can control precisely the displacement of the lapped area in the tooth surface and keep the even backlash.
本公司生产深沟球轴承、角接触轴承、圆锥滚子轴承、滚针轴承；
Our products include deep groove ball bearing, angular contact ball bearing, taper roller bearing, and needle bearing;
本公司生产深沟球轴承、角接触轴承、圆锥滚子轴承、滚针轴承；
Our products include deep groove ball bearing, angular contact ball bearing, taper roller bearing, and needle bearing;
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