SU1321531A1 - Multijaw self-centering chuck - Google Patents

Abstract

The invention relates to the field of machine tools and can be used in the turning of cylindrical parts such as rings. The aim of the invention is to increase the reliability of fastening by self-aligning and fixing the clamping jaws in the angular position in the extended state. The natron consists of a body 1, in the openings of which six cams are mounted, which are interconnected by a pull. In the back of each cam there is a cylindrical groove 11, in which a cylindrical spring 12 is placed, spanning all the jaws, while on the inner surface of the groove 11 there is a flat design that divides it into two sections. In the clamped state, the spring hangs loose and does not interact with the clamping jaws. At the beginning of unclamping, when the cams move to the right and the diameter of the groove on the cams increases, the spring spans all six cams. The spring 12 interacts with the cylindrical surfaces of the cam bore 11, as a result of which the cams are set up due to the equality of the torques acting on the cams from the spring 12 relative to their axis, i.e. when unclamping, the chuck of the cartridge will always occupy the same angular position with respect to the housing 1. 4 Il. & (L o th sp oo

Description

In the case of stalls, the spring 12 covers all six cams.

The spring 12 interacts with the surfaces 14 and 15 of the cam groove 11, as a result of which the cams 2-7 are set up due to the equality of the torques acting on the cams 2-7 on the side of the spring 12 relative to their axis (point 16). Thus, when unclamping, the cams 2-7 of the cartridge always occupy one

FIG. Figure 1 shows the cartridge, the general Yu and the same angular position with respect to the housing 1.

The fixed part 8 is mounted on the stop 17. From the end, the cartridge is closed by a lid 18, which protects the chips from the inside and the coolant.

The cartridge works as follows.

When the hydraulic cylinder is idling (from left to right), the screw 10 pushes the piston 9. The latter, in turn, moves to the left. Six cams 20 are mounted to the right, the cams 2-7. There is unclenching 2-7, made in the form of fingers, in front of the part 8.

The invention relates to a machine tool industry and can be used in the turning of cylindrical parts such as rings, including thin-walled, on automated lathes.

The purpose of the invention is to increase the reliability of fastening by self-installation and fixing of the clamping cams in the angular position in the decompressed state.

axial view; in fig. 2 shows section A-A in FIG. one; in fig. 3 - the mutual position of the groove sections on the cams and the springs in the clamping position; in fig. 4 - the same in the unlocking position. The cartridge consists of a housing 1, mounted on the spindle of the machine (not shown). In the housing 1 there are six holes, evenly located on the circumference AND at an angle to the axis of rotation of the cartridge.

15

thirty

The part of which has the form of clamping cams for securing part 8. Cams 2-7 are interconnected by a pull consisting of piston 9 and screw 10, with the help of which piston 9 is connected 25 to the piston of a hydraulic cylinder of a machine (not shown).

In order to avoid the skewing of the clamping cams 2-7 in the unfolded state, a cylindrical groove 11 is made in all the cams in the rear part, in which there is a cylindrical spring 12 covering the entire span of the cams.

In the groove on the cam there is a flat 13 (Fig. 2), dividing the groove into sections 14. and 15, with which the spring 12 interacts with the self-installation.

In the clamped state, the spring hangs loose and does not interact with the clamping jaws. At the beginning of unclamping, when cams 2-7 are moved to the right and dia 35

At the working stroke of the drive rod (from right to left), the screw 10, moving, pushes the piston 9, which moves the cams 2-7 from right to left. This occurs as long as the cam does not come into contact with part B while simultaneously setting it at the surface of the part.

Claims (1)

Claims of the invention A multi-cam self-centering cartridge, in the case of which clamping cams are located at an angle to its axis, associated with a hard drive, characterized in that in order to increase the mounting reliability by self-installation and fixing the clamping jaws in the angular position in the unlocked state, the back of each cam is made of a cylindrical groove, on the inner surface of which there is a flat design, dividing it into two sections, intended for interaction of a cylindrical groove 11 on a pipe with spring loaded into the device. At the working stroke of the drive rod (from right to left), the screw 10, moving, pushes the piston 9, which moves the cams 2-7 from right to left. This occurs as long as the cam does not come into contact with part B while simultaneously setting it at the surface of the part. Claims of the invention A multi-cam self-centering cartridge, in the case of which clamping cams are located at an angle to its axis, associated with a hard drive, characterized in that in order to increase the mounting reliability by self-installation and fixing the clamping jaws in the angular position in the unlocked state, the rear part of each cam is made a cylindrical groove, on the inner surface of which there is a flat design, dividing it into two sections, designed to interact with the spring inserted into the device. Aa turned f / f / 5 d.2 one / J f5 Fig.Z t 12 Compiled by T. Kravchenko Editor N. TupitsTehred I. VeresKorrektor G. Reshetnik Order 2703/8 Draw 975 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4 FIG.