High performance development of precision spindle bearings

Mr. Ye Jun said that, as a key basic parts, machine tool precision spindle bearings are the foundation to guarantee the machining accuracy index of machine tool. With the development of modern machine tools to the development of high precision, high speed, high reliability direction, put forward higher request to the spindle bearings.

  As in the traditional mechanical or general machinery, mainly in the hundreds to thousands of speed r / min/ agricultural bearings , while the modern high-speed processing machine, spindle speed required to reach tens of thousands to ten revolutions per minute. In the bearing industry, said the speed performance with dmN value, it is a product of the diameter and the speed of the machine tool spindle, the index is generally less than 2 million, the highest of 4 million, require very high.

  Therefore, bearing on the design requirements, with angular contact ball bearing as an example,marine crane bearing from material selection, structure design, guide way design, lubrication, groove curvature coefficient selection and other aspects needed for spindle requirements analysis, research.