Numerical control machine tool spindle box system with indexing mechanism

Abstract

The invention discloses a CNC machine tool main shaft box system with an indexing mechanism, which includes a box body and a main shaft, and also includes a main shaft indexing device, a bearing sealing system, a bearing pre-tightening and anti-backlash device, and a bearing lubricating system. The headstock system uses the active friction wheel with adjustable vertical position to drive the driven friction wheel to rotate, and uses the stepper motor or angle sensor to control the rotation angle of the main shaft. The indexing is accurate, the indexing operation is simple and convenient, and the cost of the indexing device is low. Moreover, the bearing sealing system of the spindle box system can not only protect the bearing from dust and pollution, but also cool down the inner ring of the bearing and the main shaft, improve the rigidity of the main shaft and the inner ring of the bearing, and maintain the rotation accuracy of the main shaft. And the bearing pre-tightening and anti-backlash device can automatically eliminate the gap caused by bearing wear, so that the rigidity of the first deep groove ball bearing and the second deep groove ball bearing is greatly enhanced, which can greatly improve the rigidity of the spindle system, improve the rotation accuracy of the spindle and Machine tool machining accuracy.

Description

technical field [0001] The invention relates to the technical field of machine tools, in particular to a spindle box of a numerically controlled machine tool. Background technique [0002] The spindle box is an important part of the machine tool, which includes a box body, a spindle component, and the like. Main shaft components are usually composed of main shaft, bearings and transmission parts (gears or pulleys). In the machine tool, the main shaft is mainly used to support transmission parts such as gears and pulleys, to transmit motion and torque, to drive the workpiece or tool to rotate, etc. It is used as a CNC machine tool for high-precision machining, and the quality requirements for the main shaft components are very high. [0003] During the processing of the machine tool, the radial force of the spindle is large, but the axial force is relatively small, so the radial bearing supporting the spindle is very critical. In the prior art, deep groove ball bearings are...

AI Technical Summary

Problems solved by technology

[0009] In view of this, the purpose of the present invention is to provide a CNC machine tool headstock system with an indexing mechanism, to solve the technical problems of high cost and complicated operation of the mechanical indexing device used for the existing spindle indexing, and to solve the problem of bearing clearance , Bearing wear, bearing and spindle temperature rise and other technical problems that lead to reduced machining accuracy of machine tools

Images