Large precise numerical control rotating table

Abstract

The invention relates to a large precise numerical control rotating table. The large precise numerical control rotating table comprises a table base, a table spindle, worms and worm gears which are mounted in both sides of the table base and a reducer and a servo motor which are connected with the worm in one side of the table base. The large precise numerical control rotating table is characterized in that the worm in the other side of the table base is connected with the reducer and the servo motor by a coupling so as to form a driven worm gear pair for providing a resistance moment for the table base; and the outer circumference of the table base is provided with a plurality of static pressure support pads, a clearance is left between the lower end surface of the table spindle and the static pressure support pads, three rows of cylindrical roller rotating table bearings are mounted between the table spindle and the table base, and the inner rings of the three rows of cylindrical roller rotating table bearings are provided with steel scales. The invention solves the problems that the rotary positioning accuracy is low, the table runout of the rotating table can not meet the accuracy requirements, the supported workpiece can not bear a large impact force as a result of restricted eccentric center and the like. Besides, the invention greatly improves the transmission smoothness of the rotating table and prolongs the service life of the bearing.

Description

technical field [0001] The invention belongs to the field of machine tool manufacturing, in particular to a large-scale precision numerical control rotary workbench. Background technique [0002] The CNC rotary table is the core component of various machine tools such as vertical lathes, milling machines, machining centers, and CNC gear shaping machines. Production processing capacity and efficiency. The current application status of large CNC rotary table is not ideal. [0003] At present, the driving method of large CNC rotary table is mainly servo motor. The transmission mode of the large CNC rotary table includes worm gear transmission and gear transmission. Practice has proved that worm gear transmission can provide high transmission accuracy and high transmission stability, but affected by various uncertain factors such as machining, assembly and debugging, the worm gear transmission process of large CNC rotary table is inevitable There is a transmission gap, which...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the large-scale CNC rotary table cannot cope with various complex cutting due to insufficient rotary positioning accuracy, difficulty in meeting the accuracy requirements for the end jump of the table top of the rotary table, limited eccentricity of the workpiece to be loaded, and inability to withstand large impact forces. In order to solve the problem of processing requirements, a large precision CNC rotary table is provided that is driven by double servo motors and driven by double worm gear pairs, and supported by YRT three-row cylindrical roller bearings and static pressure.

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