The main technical requirements analysis of the spindle

Supporting shaft neck of the technical requirements for general axial parts assembly benchmark is a supporting shaft neck and shaft of the precision surface are also the supporting shaft neck as design basis, so the precision of supporting shaft neck shaft is the most important, its precision will directly affect the precision of drive shaft rotation. With taper of A and B before and after surface as the main bearing, intermediate for auxiliary bearing) Its roundness and coaxial degree ( By beating indicators limit) All have high accuracy requirement. Thread the technical requirements of the main shaft for assembling nut, the nut is installed on the shaft of the rolling bearing clearance to use, if nut end relative to the shaft axis tilt, can make the bearing inner ring tilt by force, bearing inner ring skew will affect the spindle rotation accuracy. So the main thread tooth shape is, the clearance between the nut and smaller. Must control end of the nut to beat, make its in trace mobile adjust bearing clearance, stress direction is of bearing inner ring. Front-end taper hole of technical requirements for the spindle taper hole is used to install the top or tool Morse taper bean, the axis of the cone hole must be with the axis of the supporting shaft neck coaxial, otherwise affect top cone bean or tools installation accuracy, when machining the workpiece positioning error is produced. Short front end of the cone and the technical requirements for the main shaft and end face is to install the front end of the cone chuck locating surface, in order to ensure the installation position precision chuck the conical surface must and shaft neck coaxial, must face with the spindle rotation axis vertical. Other technical requirements such as on the surface of the technical requirements on the surface of shaft and gear assembly is: for A and B journal attachment circular run-out tolerance of 0. 015 mm, to ensure the stability of gear transmission, reduce noise. The above ( 1) 、（ 2) Technical requirements affect the spindle rotation accuracy, and ( 3) 、（ 4) Technology requirements affect positioning precision of the spindle as assembly benchmark, and the first ( 5) Technology requirements affect work noise, these technical requirements is the key technology of spindle machining on the surface of the problem. To sum up, for shaft parts, can work from the rotation accuracy, positioning accuracy, noise analysis of the three aspects of the technical requirements.