Arrangement of two bearing spindle high-speed drilling planer milling machine tapping machining center of rolling bearing:
The reasonable arrangement of rolling bearing spindle planer milling machine, two bearing spindle bearing configuration form two bearing spindle bearing configurations, including spindle bearing selection, combination and arrangement. Mainly according to the design of the spindle components in the speed, bearing capacity, stiffness and precision and other aspects of the requirements. The layout of the common two bearing spindle rolling bearings is given. The following general principles should be followed in determining the configuration of two bearing spindle bearings.
1) planer milling machine to stiffness and bearing capacity requirements should meet the requirements of bearing capacity and stiffness. When the radial load is large, the bearing configuration can be selected, and the configuration form can be used in the lower hours. In addition, the stiffness of the double row bearing is higher than that of the single column. As the stiffness of the spindle can be improved effectively, the rigidity of the bearing should be raised in the front support.
2) meet the speed requirement of planer milling machine maximum speed allowed by the bearings of different types, specifications and grades are different. Under the same conditions, the contact of the point contact is higher; the cylindrical roller is higher than the ring cone roller. Therefore, the two aspects of the stiffness and speed of the spindle should be taken into consideration to select the bearing configuration.
3) to meet the requirements of precision planer milling machine spindle bearing axial thrust bearing configuration seven is directly affected by the axial position precision spindle. The performance and application range of the three commonly used configuration forms. When the front end is positioned, the main shaft is heated and deformed to extend back, and the machining accuracy is not obvious. However, the structure of the front support is complex, so it is not convenient to adjust the bearing clearance. The amount of L heating at the front support is large. The characteristics of the back end positioning are contrary to the above. When the two ends are located, the axial gap of the bearing is changed greatly when the spindle is heated and elongated.
High speed drilling center
