SU1040698A1 - Device for centerless turning - Google Patents

Abstract

DEVICE FOR BESTSENTROVOTOKARNOY PROCESSING, e.g., rod material, comprising ustanovm fj fief in supports, adjustable sleeve with inner conical surface mounted with clearance on the bearing cutters hollow spindle to cooperate with a cutter at its relative axial peremeschensh of t lichayuschees in that In order to simplify the construction and increase the reliability of the device, on the mating surfaces of the adjustable sleeve and the spindle, evenly around the circumference, several spindle axes are made Cylindrical nests, bearing twisted cylindrical springs, the outer diameter of which corresponds to the diameter of the nests. g

Description

The invention relates to a machine tool industry and can be used, in particular, in centrifugal lathes for machining rod materials. .

A device for centerless turning, for example, rod materials, contains an adjustable sleeve installed in the supports with an inner conical surface, mounted with a gap on the cutter bearing hollow spindle with the ability to interact with the cutters with its relative axial movement, moreover, to unload the bearing sleeve of the adjustable sleeve the hydraulic bearings lj are evenly distributed between the axial displacement device of the adjustable bushing and the machine body,

The disadvantage of this device is the complexity of the design, as well as the lack of reliability and complexity of the manufacture and adjustment of hydraulic pads, associated primarily with a large number of seals, pipelines and oil leaks associated with this.

The purpose of the invention is to simplify, construct and construct the reliability of the device.

To achieve this goal, in the device on the mating surfaces of the adjustable sleeve and the spindle, evenly around the circumference there are several parallel spindle axes of cylindrical nests carrying twisted cylindrical springs with an outer diameter: the meter corresponds to the diameter of the nests.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 — node 1 in FIG. one; FIG. 3, section A-A in FIG. 2

The device is made in the form of a hollow spindle 2 housed in the housing 1, a rotary spindle b1e | ednim. the end through the bearing 3 and the non-rotating elastic support 4. The tail part of the spindle 2 rests on the elastic support 5, which is mounted on the driven pulley 6 of the spindle 2 drive and is synchronously rotating with it to transfer torque to the spindle 2. The pulley 6 is mounted on bearings 7, supported on the sleeve 8, rigidly connected through the flange 9 with the housing 1. At the front end of the spindle 2 are mounted, with the possibility of radial movement of the cutters 10, interacting with the inner conical surface of the adjustable sleeve 11, is installed second spindle with clearance, commensurate with the imbalance of the spindle 2 in this section and oespechivayuschim its axial movement relative to the spindle. The adjustable bushing 11, through the bearing assembly 12 and the bushing 13, interacts with the worm gear 14 of the axial movement mechanism by means of a threaded connection. On the sleeve 13 there is a finger 15, which enters the opening 16 of the housing and allows only axial movement of the sleeve 13. Inside the spindle there is a hollow rod 17 with product holding 18 rollers 19. The hollow rod 17 is cantilevered and fixed with its tail through flange 20 on the housing 1 . On the outer surface of the spindle 2 at the place of its interaction with the adjustable sleeve 11, not less than two cylindrical nests 21 uniformly distributed around the circumference were made, and on the inner surface of the adjustable sleeve 11 the same number of semi-cylindrical nests 22 were made. 22, coiled cylindrical springs 23 are installed, the diameter of which corresponds to the diameter of the sockets. The number of turns; the springs 23 is selected depending on the maximum torques 11 transmitted from the spindle 2 to the hub

The device works as follows.

The hollow spindle 2, driven by the bucket, Mbw by the pulley 6 and the elastic support 5, rotates together with the cutters 10 of the workpiece 18 held by the rollers 19. In this case, the hollow spindle 2 and the bearing 3, due to the non-rotating elastic support 4 and the rotating elastic support 5, they are a single oscillatory system, self-centering at the operating speed, in which the radial static and dynamic forces from the belt are perceived directly by the housing 1 through the bearing 7 and the sleeve 8, without affecting the spindle 2. At the same time torque from spindle 2 through springs 23 is transmitted by an adjustable sleeve 11, and

with radial oscillations of the spindle I relative to the sleeve 11 of the spring 23 are deformed in the radial direction, without interfering with these vibrations of the spindle 2. To shift the cutters 10 in the radial direction, as a result of their partial wear, the worm is connected to the axial displacement device,

which, acting on the worm gear 14 through a threaded gear, axially displaces the sleeve 13, and with it the bearing unit 12 and the adjustable sleeve 11 relative to the spindle 2. The sleeve 11 with the inner conical surface acts on the cutters 10, shifting them to the center.

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Claims (1)

DEVICE FOR CENTER-FREE CENTRAL PROCESSING, for example, of bar materials, containing an adjustable sleeve with an internal conical surface mounted in bearings, with a clearance on the hollow cutting spindle with the possibility of interaction with the cutter during its relative axial movement, which is different from I mean that, in order to simplify the design and increase the reliability of the device, on the mating surfaces of the adjustable sleeve and the spindle, several parallel to the axis of the qil spindle are made uniformly around the circumference -cylindrical socket bearing twisted coil springs, the outer diameter of which corresponds to the diameter of the sockets. . ι. spike -h 1 10406982