Turning – Lathe – With program control
Patent
1988-12-06
1990-05-22
Terrell, William
Turning
Lathe
With program control
82120, 82148, B23B 2300, B23B 704
Patent
active
049267230
ABSTRACT:
An auxiliary-function hydraulic system is provided for a computerized numerical control (CNC) machine tooling unit. Hydraulic power is provided for locking collet or chuck to an open or closed position and providing an affirmative collet-open and/or collet-closed signal to communicate the collet position to the host computer. The tailstock can be brought gently forward to contact a workpiece and can be returned rapidly to the home position, with a break-away pressure feature being employed to overcome initial static friction. A pressure switch indicates that the tailstock is in position against the workpiece. A spindle brake applies braking to the spindle to stop the same from high speed either on command or in the event of system failure. In the latter case, braking occurs prior to loss of pressure to the collet closer cylinder. Also, a turret clamp locks and unlocks a tool changer turret.
REFERENCES:
patent: 3198042 (1965-08-01), Binns
patent: 3581611 (1971-06-01), Lentz
patent: 4335633 (1982-06-01), Boffelli
patent: 4507993 (1985-04-01), Silverman et al.
patent: 4621551 (1986-11-01), Silverman
patent: 4751864 (1988-06-01), Leigh et al.
patent: 4807501 (1989-02-01), Leigh et al.
Ralph Earl Co., Inc.
Terrell William
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