Mechanical type numerical control double-shaft turntable device

Abstract

The invention relates to a mechanical type numerical control double-shaft turntable device which comprises a turntable C shaft, an A shaft driving end and an A shaft support end, wherein by being matched with a bore bearing of an A shaft, two ends of the turntable C shaft are respectively fixed on the A shaft driving end and the A shaft support end. The A shaft driving end and the turntable C shaft are respectively used for driving the A shaft to rotate by virtue of respective servo motors, transmission gear retarding mechanisms and cam pair retarding and clearance-eliminating mechanisms. An eccentric mechanism can be used for adjusting a gear centre distance, thereby realizing the gear back lash between transmission parts of the A and C shafts. The eccentric mechanism can be used for adjusting a cam pair centre distance, thereby realizing the back lash between cam input and cam output shafts of the A and C shafts. The A and C shafts can be indexed, positioned and self-locked at any angle. The mechanical type numerical control double-shaft turntable device can be used for eliminating a reverse clearance of the numerical control double-shaft turntable under the effect of adjustment. The mechanical type numerical control double-shaft turntable device is conveniently processed and assembled and is good in precision-keeping property.

Description

technical field [0001] The invention relates to a mechanical numerically controlled two-axis turntable device applied to a numerically controlled five-axis machining center. Background technique [0002] In the application process of most mechanical CNC double-axis turntables, the servo motor transmits torque through the synchronous pulley and then through the transmission gear or worm gear, and the reduction mechanism. It is difficult for the CNC double-axis turntable to achieve high-precision positioning. [0003] The meshing backlash on the transmission chain of the transmission gear, worm gear and worm double-axis CNC turntable has an inevitable impact on the indexing accuracy of the turntable. In order to reduce the impact on the accuracy of the turntable, the commonly used method is to use double-pitch gradually thicker worms or double-body The worm eliminates the backlash, but the disadvantages of these two methods are: the machining accuracy is strictly required in t...

AI Technical Summary

Problems solved by technology

[0003] The meshing backlash on the transmission chain of the transmission gear, worm gear and worm double-axis CNC turntable has an inevitable impact on the indexing accuracy of the turntable. In order to reduce the impact on the accuracy of the turntable, the commonly used method is to use double-pitch gradually thicker worms or double-body The worm eliminates the backlash, but the disadvantages of these two methods are: the machining accuracy is strictly required in the process of processing the worm; the preload requirement of the CNC double-axis turntable is high during the installation and debugging process; the single tooth meshing side clearance cannot be adjusted after assembly, and the If the backlash is too large; if the side clearance of the transmission gear and worm gear is too small, a large amount of heat will be generated during the operation of the turntable, and the tooth wear and tooth surface gluing will be serious.

[0004] Due to the long-term wear and tear of transmission gears and worm gears, the backlash of these reduction mechanisms is difficult to adjust due to their structural limitations, and the long-term running accuracy of CNC double-axis turntables deteriorates.

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