The spindle assembly has a lot of performance in use, and people have higher performance requirements for the spindle assembly, because now the use of the spindle assembly is more extensive, and plays an important role in use, we should pay attention to the performance of the spindle assembly when purchasing. At present, there are many spindle components in the market with different quality. When purchasing, the performance of spindle components should be considered. Now let's introduce to you the performance requirements for the spindle assembly when purchasing.
The first is the rotation accuracy, the rotation accuracy of the spindle assembly, which means that when the machine tool rotates at low speed and no-load, the radial and axial runout values of the workpiece or tool installed at the front end of the spindle meet the requirements, and the spatial position of the rotation center line changes at every instant. The average spatial position of these instantaneous rotation centers is called the ideal rotation center line. The distance between the instantaneous rotation center line and the ideal rotation center line in space is the rotation error of the main shaft, and the range of rotation error is the rotation accuracy, which needs to be controlled in the design. Secondly, the stiffness of the spindle assembly refers to the ability of the spindle assembly to resist deformation when subjected to external forces. It is usually expressed by the applied force in the direction of displacement when the unit displacement is generated at the front end of the main shaft. The greater the stiffness of the spindle assembly, the smaller the deformation of the spindle. The visible stiffness directly affects the performance of the spindle assembly. The stiffness of the main shaft components is related to the structural size of the spindle, the span of the support, the type and configuration of the bearing, the adjustment of the bearing clearance, and the position of the transmission elements on the spindle.