SU1708539A1 - Carrier center - Google Patents

Abstract

The invention relates to mechanical engineering technology and is intended for machining shafts on a lathe. The aim of the invention is to expand technological capabilities and increase reliability. On the re-working conical part 2 there are inclined, A grooves 3, in which spring-loaded axles of the 5. bells are located, made in the form of rollers ^^ truncated by the inclined plane. The workpiece 11 is mounted on the conical part 2, while pressing with the tail headstock 9 into the gear surface of the rollers 4. The device is changed from small parts processing to large ones and vice versa by moving the driven rollers ^ i with a variable toothed surface along the grooves 3 and turning them to iSO "around their axes. l • SB 1100 sdO5 >. &

Description

This invention relates to mechanical engineering technology and is intended for machining shafts on lathes.

The aim of the invention is to expand technological capabilities and increase reliability.

The drawing shows the flood center, a general view.

The device contains a shank 1 and a working conical part 2, equipped with two low frequency sloping :) slots 3 and conical driving rollers 4 located on axles 5 with a locking ring 6 "Axis 5 is spring-loaded with a spring 7 and can move along the grooves 3. On the drive rollers 4 clamps 8 are made for installation in the initial position,

The toothed work surfaces 9 and 10 of the driven rollers l are in contact with the end of the workpiece 11 “. The plug 12 serves to hold the spring 7 0 to the groove 3.

The device works as follows,

The drive (eiger is inserted by the tail of the machine 1 R spindle of the machine. The workpiece 11, moved by the center of the tailstock, moves the center hole on the working part., Ensuring the centering of the part, / At the same end of the workpiece. 8 abutted gear 8 work gear surface 9 conical rollers f , inserting the tooth into the end face of the part by the initial value “During the machining of the part, the cutting force is perceived with the feed rollers 4. As the cutting moment increases, the part and its related parts are braked. The 9 surfaces of the driving rollers 4 located;; (on axles x 5 ". Since the machine spindle, together with the LEAD center, continues to undermine the axes 5, the rollers k move in grooves 3 towards the end of part 11, , increasing - out; the teeth and the teeth are machined, thereby an additional compression of the part,

The changeover of the proposed device from the processing of parts of small diametral dimensions to side arms is done by moving the drive rollers with a variable toothed surface of the voll 3 and turning them by l80 ° around their axes 5.

Due to the rotation of the tapered drive rollers on the iSo, the height of the toothed work surface changes (increases or decreases), which allows machining parts of the corresponding diameter.

When machining parts with small diametrical dimensions, the tapered drive rollers are turned towards the end of the part with a narrow side with a spongy working surface 9, moreover

the springs 7 press the axles 5c with the drive rollers 8 arranged on them to the lowest position. When, the end of the part is moved to the tapered drive rollers k occurs

moving them along with axes

the groove lines in the direction away from the center of the axis, performed a changeover of the driven rollers to the specified diameter and expanded technological capabilities.

For readjustment of the proposed device for machining parts with large diameters, the tapered drive rollers turn to l80

around their axes and installations; pour the parts onto the end with the wide side of the toothed working surface 10.

The springs 7 provide self-alignment of the drive rollers depending on the change in the diameter of the center hole of the part or the non-perpendicularity of the end face. The locking ring 6 holds the drive rollers on the axles 5. The locks 8 during machining of the part limit the rotation of the drive rollers within 180 degrees.

Claims (1)

Invention Formula The drive center, containing a stationary roller with a shank and a conical working part and driver elements, made in the form of rolling bodies with corrugations along a generatrix of 5 ° and X) u, is also due to the fact that (In order to increase the reliability of the working conic part, there are inclined grooves in which axes can be axially moved, the axes inserted into the device are arranged perpendicular to the core of the working part and are predetermined to be placed in the shape - 170853 9 6 of them are rolling bodies, made of rollers with Fixed protrusion sections with inclined planes.