SU1009633A1 - Collet chuck - Google Patents

Abstract

The collet chuck, in the pillars of the slots of the jaws of the collet, is placed the cams retained by the annular springs, in the end holes of which the springs are installed, which are pre / snapped to interact with the end face of the disk-abutment located in the annular bore of the collet, which is different and In order to increase the rigidity of the bar fastening, the cartridge is equipped with a second row of twin wedge cams installed in the collet slots, a helical spring and a guide sleeve located in the inner recess of the collet, while the inner springs a is located between the guide bushing and the internal wedges of the second cam of the second double and double pitch wedge: kutkhachkov.

Description

Isophilic granulating is applied to the area of metalloblasting and can be used for clamping bar material in lathes.

A collet chuck for clamping bar material, containing a collet, is known in inclined jaw slots. The jaws are held by annular springs, a stop disc located in the collet bore, and the end faces are fitted with springs for interfacing. with face surface disc 1. However, in such a cartridge, the low radial stiffness of the clamping due to odioiapHoro clamping and changing it when the diameter of the rod changes, influences the reach of the treatment (with a smaller diameter of the rod), the treatment reach increases, when it decreases, especially when clamping and processing uncalibrated bars ...

The aim of the invention is to increase the stiffness of the bar fastening.

This goal is achieved by the fact that the collet chuck, in the inclined slots of the jaws of the collet, are placed the cams, in the end holes of which are installed, springs, intended for interaction; The end face of the stop disc located in the collet bore of the collet is provided with a second row of twin wedge cam mounted in the slot of the collet, a helical spring and a guide bush located in the inner. At the recess of the collet of the screw, the spring is located between the guide sleeve and the inner wedge cams of the second row and doubled blenders.

FIG. 1 shows a collet chuck, longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The cartridge contains a collet 1 with inclined grooves in the petals under the cams 2 (Fig. 3), in the openings of which springs 3 are located, abutting on the other side into the disc support 4. Cams 2 are held in two holes by two springs 5, and their axial displacement 5 is limited by an annular spring 6. The collet 1 is located in the spindle 7, and in its slots between the petals there is a second row of inner 8 and outer 9 wedge cams. Internal cams

0 8 are located in the grooves of the outer 9 cams and are clamped by the helical spring 10, and resting the guide sleeve 11, which is located in the inner recess of the tsangi 1. Ring springs 12 are used for protection from the cam 8, and from falling out of the cam 9, the ring springs 13 The clamp of the rod 14 is dried out from the drive, the connection with which is provided by means of the clamping tube 15, screwed to the collet 1.

- The cartridge works as follows.

In the expanded state, when the bar 14 is fed under the action of the springs 3, the cams 2 contact with inclined grooves in the jaws of the collet 1 and the bar 14, and under the action of the pr-suppers 1O, the double wedges are in contact with the spindle hole 7 and the bar 14..

This ensures self-adjusting of the cartridge and tracking the diameter of the bar 14. After the bar 14 is fed up to the stop and the collet 1 is tightened from the drive into the inside of the spindle 7, it is clamped by the cams 2 at the front and the cam 8 at the rear. The additional pressure force is determined by the tension of the spring 10.

The angles of inclination of cams 2 and 8. are made within the limits of the self-locking angle;

The economic effectiveness of the use of the proposed cartridge is due to an increase in machining productivity due to an increase in cutting conditions, as well as an increase in accuracy

from the machining of parts due to the reduction of the osastation of the workpiece in the cartridge-part system.

Fig.Z

Claims (1)

Collet chuck, in the inclined grooves of the jaws of the collet which cams are held by ring springs, in the end-openings of which there are springs designed to interact with the end face of the stop plate located in the ring boring of the collet, characterized in that, in order to increase the rigidity of fixing the bar, the cartridge is equipped with a second row of twin wedge cams installed in the slots of the collet, a coil spring and a guide sleeve located in the inner recess of the collet, while the coil spring is located wife between the guide bushing and the inner wedge cam of the second row of double .kulachkov. * KL I Λ 05 CO I 1009633 2 wives of the spring 3, resting on the other side against the support disk 4. From falling out