Apparatus for locking main shaft

Abstract

The invention discloses a spindle locking device and relates to a precise spindle locking device. The spindle locking device consists of an internal expansion sleeve, an external expansion sleeve, a spring disc, a piston block and a fixed post, a fixing bolt and a fixing bolt. The internal expansion sleeve is fixed on a spindle and can rotate together with the internal expansion sleeve. The external expansion sleeve is sleeved on the internal expansion sleeve. Conical surfaces which are matched with each other are arranged between the internal expansion sleeve and the external expansion sleeve. The external expansion sleeve is sleeved on the internal expansion sleeve through the conical surfaces. The spring disc is sleeved on the internal expansion sleeve. The external expansion sleeve is positioned between a rear flange of the spindle and the spring disc. The spring disc is fixed with the rear flange through the fixed post and the fixing bolt. The spring disc and the external expansion sleeve are locked through the locking bolt. The piston block is arranged between the rear flange and the external expansion sleeve. Using the deformation characteristic of the spring disc and a taper locking mode, the locking device avoids any influence on the precision of the spindle when the spindle is locked and absolutely reliable locking is achieved, thereby ensuring the precision of processed parts, the precision of the spindle and the service life of the spindle.

Description

technical field [0001] The invention relates to a spindle locking device, which relates to a precision spindle locking device, in particular to a precision spindle locking device for a high-speed electric spindle used in a machining center. Background technique [0002] The existing machine tool spindle locking devices are bulky, complex in structure, unreliable in locking, and due to the eccentric error with the spindle during locking, it is easy to affect the accuracy of the spindle; while the high-speed electric spindle for machining centers is generally used for precision CNC machining center, the precision requirements of the spindle are particularly high. If the spindle locking device affects the precision of the spindle, the machining accuracy will not be achieved, and the service life of the spindle bearing and the spindle will be reduced; in addition, most of the electric spindles of high-speed precision machining centers are used in multi-axis Linkage, for example,...

AI Technical Summary

Problems solved by technology

[0002] The existing machine tool spindle locking devices are bulky, complex in structure, unreliable in locking, and due to the eccentric error with the spindle during locking, it is easy to affect the accuracy of the spindle; while the high-speed electric spindle for machining centers is generally used for precision CNC machining center, the precision requirements of the spindle are particularly high. If the spindle locking device affects the precision of the spindle, the machining accuracy will not be achieved, and the service life of the spindle bearing and the spindle will be reduced; in addition, most of the electric spindles of high-speed precision machining centers are used in multi-axis Linkage, for example, on a five-axis linkage machining center, the electric spindle is generally superimposed on the slide plate, and needs to move up and down, forward and backward, and also needs to rotate. This requires that the volume of the spindle should not be too large. The existing spindle locking device generally Huge volume; due to the simplified structure of the existing turning and milling machining center, the turning tool is installed on the electric spindle of the machining center, which requires the spindle locking device to be absolutely reliable, and the existing locking device is difficult to meet the requirements

Images