Introduce you to improve the performance of the spindle component

1. The directional error of rolling bearing assemblyThe front end of the spindle must have positioning surface (outside cylindrical surface or before the taper hole surface). Before the installation of bearings, must first measure the bearing inner ring and radial beat circle on the surface of the positioning, and then press the directional fitting method to bearing assembly, can achieve the purpose of improving the spindle rotation accuracy.

1) has the outer cylindrical surface of the spindleBecause of the processing technology, the axis of the surface of the shaft neck and the front cylinder positioning the radial beat circle not only in the same amount of axial plane, and in the same direction, therefore, beating the influence of the amount of bearing assembly is very small, is not considered; When assembling, should make the front and rear axle of maximum radial round beating in the same axial plane, and in the same side as the axis, which can reduce the end of the spindle radial circular runout, the spindle rotation accuracy.

2) with a taper hole on the surface of the spindleBecause of the processing technology, the spindle axis neck surface and taper hole surface cannot be processed in a clamping, will inevitably produce relative to the axis of the radial circle dance. Before and after assembly when the main shaft bearing inner ring of the radial circular runout amount and the center line of the spindle taper hole deviation in the same axial plane, and are assembled in a certain direction, in order to improve the spindle rotation accuracy.

2. After finishing assemblySpecial precision of the spindle components, such as coordinate boring machine spindle component, main shaft bearing installed within the sleeve, the spindle taper hole of jitter tolerance only 1 um um - 2, in order to guarantee the precision of the spindle component, can adopt the method of assembly after finishing, namely the spindle component assembly first, based on the spindle taper hole on both ends of fine grinding spindle sleeve cylindrical; Again on the basis set of Jane cylindrical, fine grinding in the hair shaft taper hole.Precision machine tool after adopting these methods quite high rotation accuracy, if you want to remove the bearing when repair, remove before, in between shaft and bearing inner ring, outer ring and housing (or spindle sleeve) should make the mark, between assembly according to mark when installed, otherwise after reshipment precision is difficult to guarantee.