Chucking device

Details Chucking device Chucking device

1986-08-18

1988-12-20

Bilinsky, Z. R.

Turning

Severing or cut-off

Interrelated means for tool infeed and circumrotation

82 40R, 279 4, B23B 1902, B23B 3130

Patent

active

047918411

ABSTRACT:
A primary piston (19) slides axially on a spindle body (5). Together with two cylindrical bearing surfaces of different diameters (D1 and D2) of the spindle body, the primary piston bounds a primary hydraulic chamber 22) which communicates via a conduit (25) with a secondary hydraulic chamber (24). The active face (33) of a secondary piston (20) bounds the secondary hydraulic chamber (24), so that the secondary piston (20) is displaced in response to a displacement of the primary piston (19) which is reduced in the same ratio as the cross-sections of the two chambers. The secondary piston (20) acts upon a chucking sleeve (15) which actuates the chuck (12) against the bias of a spring member (17) which, in the absence of pressure, holds the chuck (12) grippingly on a workpiece. The primary piston (19) is controlled by compressed air fed through a fixed spindle support (1) via a conduit (27) into a pneumatic chamber (21) bounded by a fixed bore (8) and by two disk-shaped elements (7 and 19) rotating with the spindle.

REFERENCES:
patent: 2833543 (1958-05-01), Main
patent: 3625530 (1971-12-01), Parsons
patent: 3643969 (1972-02-01), Finley et al.
patent: 3835649 (1974-09-01), Le Testu
patent: 4615101 (1986-10-01), Edwards et al.

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