SU1458131A1 - Rotary table - Google Patents

Abstract

The invention relates to a machine tool industry and can be used in machine tools operating in positional and contour modes. The purpose of the invention is to expand technological capabilities by providing adjustment of the gear ratio of the drives. Turntable actuators include ball nut screws, which are driven directly from the motors. The radially located carrier 9 is rigidly fixed on the faceplate shaft. Screws 10 and 11 of nut-screw pairs are connected with each other with a common finger with the possibility of rotation relative to the latter. The finger without backlash is interfaced by means of a slide with a planet carrier 9 with the possibility of movement along the latter. Both drives are equipped with linear displacement sensors that provide automatic adjustment of the gear ratio. The rotors of the electric motors of the drives, tracking the signal applied to them, turn the nuts of the nut and screw pairs. Since the screws 10 and 11 are connected by a common finger and cannot be rotated, they make a translational motion, tracking the electrical output signal. To obtain a uniform rotation of the table faceplate, the electric control system provides two electric signals to the adjustable electric motors of the drives, the law of change of which corresponds to the trajectory of the finger axis in the form of a circle with a center lying on the faceplate axis. When the actual trajectory deviates from the correct circle, the relative displacement of the finger along the carrier 9 occurs by the magnitude of the error and, thus, the jamming of the mechanism is impossible. 3 il. iS (L s

Description

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Claims (1)

Claim A rotary table containing a faceplate installed in the housing, the shaft of which is connected to its rotation drive, characterized in that, in order to expand technological capabilities, the table rotation drive is made in the form of two nut-screw pairs, a carrier rigidly mounted on the faceplate shaft, and a slider installed with the possibility of moving along the carrier, while the screws of the screw-screw pairs at one end are pivotally connected by means of a finger with a slider inserted into the drive, the nuts - with the housing, and the screw-screw pairs are located in the plane, parallel Yelnia faceplate plane and at an angle to one another. AA fi 2 View b Fae. 3