Apparatus for locking accurate main shaft

Abstract

The invention provides a precise spindle locking device and relates to a locking device. The locking device consists of a fixed board, a flange, braking blocks, dowel bars and a locking oil cylinder, wherein the braking blocks and the dowel bars are arranged at two sides of the flange and are bilaterally symmetric. The flange is fixed on a spindle. The fixed board is fixed on a spindle box. The dowel bars are fixed on the fixed board. The braking blocks are fixed on the inner sides of the dowel bars. The locking oil cylinder is fixed between the left and right dowel bars. Stop pins are arranged on the outer sides of the dowel bars. The dowel bars can rotate by taking only rotating shafts as centers. Braking blocks are fixed on the dowel bars through rotating pins. Based on principles of self-centering and lever force amplification, the precise spindle 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 precision spindle locking device of the present invention relates to a locking device, in particular to a precision spindle locking device. Background technique [0002] The existing machine tool spindle locking device has an eccentric error with the axis of the spindle during locking, causing mechanical damage to the spindle during locking, repeated locking and loosening for a long time, the mild one will affect the accuracy of the spindle bearing, and the severe one will damage the spindle Bearings, so it is easy to affect the accuracy of the spindle, and the locking is not reliable; and with the development of high-precision and high-speed machine tool technology, the accuracy and reliability requirements of the spindle are getting higher and higher. If the spindle locking device has an impact on the spindle accuracy , the machining accuracy cannot be reached, and the service life of the spindle bearing and the spindle will be reduced; in additi...

AI Technical Summary

Problems solved by technology

[0002] The existing machine tool spindle locking device has an eccentric error with the axis of the spindle during locking, causing mechanical damage to the spindle during locking, repeated locking and loosening for a long time, the mild one will affect the accuracy of the spindle bearing, and the severe one will damage the spindle Bearings, so it is easy to affect the accuracy of the spindle, and the locking is not reliable; and with the development of high-precision and high-speed machine tool technology, the accuracy and reliability requirements of the spindle are getting higher and higher. If the spindle locking device has an impact on the spindle accuracy , the machining accuracy cannot be reached, and the service life of the spindle bearing and the spindle will be reduced; in addition, the turn-milling compound machining center is becoming more and more popular now, and many processing parts need to be milled powerfully. The main shaft should not have any vibration, so the main shaft locking device is required to be absolutely reliable, and the existing locking device is difficult to meet the requirements

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