SU869997A1 - Self-centring chuck - Google Patents

Description

(54) SELF-CENTERING CARTRIDGE

I

The invention relates to a machine tool industry and can be used to clamp parts such as bearing rings in aggregate machines and automatic lines.

Self-centering cartridges are known, comprising a housing, clamping cams moving along inclined body guides, an end base stop and a mechanism for fixing the base stop 1.

A disadvantage of the known devices is low reliability in operation.

The purpose of the invention is to increase reliability in operation.

To this end, the base stop is mounted in the housing with the possibility of axial movement and spring-loaded relative to the housing, and the stop-locking mechanism is made in the form of a movable pusher placed in the housing with the possibility of axial movement along the axis of the cartridge and provided with a drive in the form of the cylinder of the power cylinder.

FIG. 1 shows a view of the cartridge from the end; in fig. 2 shows section A-A in FIG. I (unlocking position); in fig. 3 - section aa

in fig. 1 (clamping position); in fig. 4 shows a section BB in FIG. one; in fig. 5 shows a section B-B in FIG. 2

The cartridge includes a housing 1 with a cylinder 2, fastened to the plate 3 with bolts 4. In the holes in the housing 1 and the plate 3, located at an angle to the axis of rotation of the cartridge, sliders with clamping cams 6 are mounted. The working surface of the cams is made in the form of a sphere. Sliders 5 are kinematically connected by pivoting levers 7

fQ qo by a rod 8 of the piston 9 mounted in the cylinder 2. On the case 1 on the front side there is mounted a base stop 10 with rods 11 entering the sleeves 12 and fixed with the purpose of limiting movement through the washers 13 with nuts 14.

15 by springs 15. In cylinder 2 a cylinder 16 d is fixed by a cap 17. In cylinder 16 a piston 18 is mounted, on a rod 19 of which a clamp 20 is fixed, which interacts in working position with a stop 10. In the cylinder 2 working cavities 21 and 22 are formed; at

 cylinder 16 - working cavities 23 and 24. The cartridge works as follows. In the off position (Fig. 3) the flow of working fluid under pressure into the cavity

21 sliders 5 with clamping cams 6 extended from the body of the cartridge. By supplying the working fluid to the cavity 23, the retainer 20 is retracted from the stop 10. After placing the base stop 10 of the preform 26 on the surface 25, the working fluid is fed into the cavity 22 and through the elements 7 and 8 move the sliders 5 with the cams 6 to the working position. In this way, the workpiece 26 is clamped with claws 6 on the inside of the workpiece. In the process of centering and clamping the workpiece 26, the spring-loaded base stop 10 eliminates jamming of the workpiece between the stop 10 and the cams 6. After the workpiece is clamped, the working fluid is fed into the cavity 24, and the cavity 23 is connected to the drain. By moving the elements 18 and 19, the latch 20 presses against the stop 10 and serves as a rigid end base for the workpiece 26. To remove the processed workpiece 26, the worker) is fed into the cavity 21, and the cavity 22 is connected to the drain. By the interaction of the elements 7, 8 and 9, the slide blocks 5 with the cams 6 are moved to their original non-working position.

Claims (1)

Claims A self-centering cartridge comprising a body, clamping cams moving along oblique body guides, an end base stop and a base stop locking mechanism, characterized in that the base stop is mounted in the body with the possibility of axial movement and is spring-loaded relative to the body, and the locking mechanism of the stop is made in the form of a movable pusher placed in the body with the possibility of axial movement along the axis of the cartridge and equipped with an actuator in the form of located in the case of the power cylinder cartridge. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 296625, cl. B 23 B 31/02. 1968. corner f fff-i . / fug. four 20 Fug.