Precision rotary table

Abstract

The invention discloses a precise rotating table. The precise rotating table comprises a table shell, a table shaft and a rotating spindle, wherein a torque motor base is fixedly connected in the table shell; the torque motor base is sleeved on the rotating spindle, and a stator and a rotor are arranged between the torque motor base and the rotating spindle; the stator is fixedly arranged on the inner wall of the torque motor base; the rotor is fixedly connected on the outer side of the rotating spindle; the bottom of the rotating spindle is fixedly connected with a rotating sleeve; a hydrostatic bearing is sleeved in the rotating sleeve; a hydrostatic lead rail is arranged on the bottom of the rotating sleeve; both the hydrostatic bearing and the hydrostatic lead rail are fixed on the bottom of the table shell. The precise rotating table is indexed via a precise split type torque motor, and the table is centered and supported via the combination of the precise hydrostatic bearing and the hydrostatic lead rail, so that both the problems of the gap adjustment difficulty of the hydrostatic bearing for centering and the jam of the table caused by the damage of the hydrostatic surface of a large-scale table under a cutting load and an overturning moment are solved, and the precision and the stability of the precise rotating table are increased.

Description

technical field [0001] The invention belongs to the technical field of machine tools, and in particular relates to a precision rotary workbench. Background technique [0002] The rotary table is the core component of various machine tools such as vertical lathes, milling machines, machining centers, and CNC gear shaping machines. The movement accuracy, bearing capacity, and ability to deal with impacts of the rotary table are related to the production and processing of the entire machine tool. Capacity and efficiency, the rotary table on the existing large-scale gear hobbing machine tool used for processing gears generally adopts worm and worm gear pairs for indexing transmission. This structure does not have a device to eliminate the gap between the worm and worm gear pairs, and its transmission accuracy is not high. , In addition, the worm is generally supported by sliding bearings. If the clearance of the sliding bearing is too small, the load will be large and easy to be...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a precision rotary table, which uses a high-precision split torque motor for indexing, and the centering and support of the table uses a combination of high-precision hydrostatic bearings and hydrostatic guide rails The structure solves the gap adjustment problem of the centering static pressure bearing, and also solves the problem that the static pressure surface of the large workbench is strained when the cutting load and overturning moment are applied, resulting in the workbench being stuffy, and improves the precision and stability of the precision workbench

Images