Numerical-control large-scale precise dual-drive gap removing rotating working table

Abstract

The invention relates to a numerical-control large-scale precise dual-drive gap removing rotating working table. The numerical-control large-scale precise dual-drive gap removing rotating working table comprises a working table body, a hollow spindle and a worm gear hub, wherein the hollow spindle and the worm gear hub are arranged on the working table body. An encoder is arranged on the hollow spindle. The worm gear hub is capable of rotating around the hollow spindle through a radial support. A worm gear is fixedly connected on the worm gear hub. Worm, epicyclic gear boxes and servo motors are respectively arranged on two sides of the working table body, wherein the worms, the epicyclic gear boxes and the servo motors are connected in sequence. The worms on the two sides of the working table body are all meshed with the worm gear, and a dual-drive structure of providing driving moment at the same time is formed, or a dual-drive gap removing structure of respectively providing driving moment and resisting moment is formed. The numerical-control large-scale precise dual-drive gap removing rotating working table has the advantages that the problem of transmission accuracy of the large-scale rotating working table is low is solved, and transmission stability can be improved effectively, and service life of the rotating working table is prolonged.

Description

Technical field [0001] The invention belongs to the technical field of numerical control machine tools and basic manufacturing equipment, relates to large-scale precision metal cutting machine tool process equipment, and particularly relates to a large-scale numerical control precision double-drive anti-backlash rotary table. Background technique [0002] Large-scale CNC rotary table is an indispensable functional component of various high-end large-size CNC boring and milling machines, gantry machining centers, CNC gear milling machines, gear shapers, and gear grinding machines. The workpiece can be CNC indexed under the drive of related systems. , Or linked with the machine tool to continuously rotate and cut the workpiece. During the cutting process, the force of the CNC rotary table is both unidirectional and bidirectional. In many cases, continuous cutting of the workpiece is realized under dynamic conditions. The corner accuracy and surface roughness of the processed parts ...

AI Technical Summary

Problems solved by technology

[0004] During the long-term processing, manufacturing and use, we found that the worm gear and worm transmission in the above-mentioned anti-backlash method has the problem of insufficient contact stiffness of the tooth surface, which is usually suitable for precision transmission with light load; when used in high torque and heavy load occasions It will cause the vibration of the worm gear output during the continuous cutting process of the large CNC rotary table and the vibration of the rapid rotation. In severe cases, the machine cannot work normally, and the machine will be scrapped early; It cannot be completely eliminated, and its application in large precision transmission systems (such as precision CNC gear grinding machines) has great limitations

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