SU884875A1 - Self-centring clamping chuck - Google Patents

Description

one

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.

Known self-centering chucks, comprising a housing with an end base surface and mounted on a spherical support head Q with radially movable clamping jaws 1.

A disadvantage of the known cartridges are relatively narrow technological capabilities. "with

The purpose of the invention is the expansion of technological capabilities by ensuring the fixing of parts with deviations from the perpendicularity of the axis of rotation and the end. 20

For this purpose, the head is installed in the body with the possibility of limited rotation relative to the base surface of the body, with stops with spherical faces with the heads defining the initial position of the head, inserted into the head.

FIG. 1 shows an axial section of the cartridge in the working position; in fig. 2 - then .. well, in a non-working position; in fig. 3 -. Section A-A in FIG. 1} on

FIG. -4 - section bb in fig. one; in fig. 5 shows a section B-B in FIG. four; in fig. 6 — node 1 in FIG. four.

The cartridge contains 1, mounted on the spindle 2 of the machine. On the housing 1 is mounted the head 3, in the radial grooves of the second set clamping cams 4, interacting with. a conical sleeve 5. The sleeve 5 is mounted on a spherical support 6 tons 7, connected to the variable-speed drive, in the form of, for example, a power cylinder (movement not shown). The head 3 is fixed on the casing 1 by means of bolts 8 and pressed out of the body 1 by springs 9. The sleeve 5 is fixed to the spherical support 6 by a nut 10. The coaxiality of the head 3 with respect to the body 1 is carried out by means of stops 11 and 12, decompressed by springs 13. Rest stops 11 and 12, in the extreme position, interact with the restricting protrusions 14 of the sockets with the shoulders 15, thus maintaining the annular gaps I and H between the walls of the housing 1 and the head 3. The cams 4 are pressed against the conical sleeve 5 by springs 16 interacting with the pins 17 fixed to the head 3 From A version in the head 3 ea JTo with a cap 18. In the annular groove of the head 3, elastic rings 19 are installed to prevent the emulsion from falling into the gap N. The force of the springs 13 is chosen so that the head with the fixed workpiece 20 is held coaxially to the body 1.

The chuck works as follows. The workpiece 20 is mounted on the cams 4 and by switching on the displacement drive (the load 7 moves in the direction of arrow D), the workpiece is clamped. During the preliminary clamping process, the workpiece 20 is centered and the inner surface and the end face are pressed to the base surface 21. When the sleeve 5 is further pressed, the head 3 self-aligns as the end of the workpiece 20 fits against the base surface 21, while the axis of the head 3 may not be parallel to the axis of the housing 1. The release of the workpiece 20 implies stvl a moving rods 7 with the sleeve 5 in the direction of arrow A, the cam 4 under the action of the springs 16 are retracted from the workpiece 20.

The technical and economic efficiency of the proposed invention consists in expanding the technological

13

capabilities by securing parts with deviations from the perpendicularity of the axis of rotation and the end.

Claims (1)

1. USSR author's certificate in application number 2855988 / 25-08, cl. B 23 B 31/02, 1979. go ig.1  3 / 17 one/ 16 19 0 -... 17 1S iO