Metal working – Plural diverse manufacturing apparatus including means for... – With turret mechanism
Patent
1989-10-24
1991-10-29
Schwartz, Larry I.
Metal working
Plural diverse manufacturing apparatus including means for...
With turret mechanism
408130, 82132, 91 29, B23B 316
Patent
active
050603558
ABSTRACT:
In order to improve a machine tool comprising at least one hydraulic drive for working motion or rapid motion operation connected via a supply pipe to a high-pressure network supplied by a high-pressure pump so that the drives can be operated with high pressure for working motion and to a substantial degree with low pressure for rapid motion, it is proposed that a low-pressure network supplied by a low-pressure pump be provided for operating the drive for rapid motion, that a flow-limiting member be arranged between the high-pressure network and the supply pipe for bringing about a pressure drop in the supply pipe during the rapid motion by limiting the flow of a hydraulic medium under high pressure and for maintaining the high pressure to a substantial degree during the working motion, and that the low-pressure network be connected to the supply pipe via a check valve which is open on account of the pressure drop during the rapid motion and closed during the working motion.
REFERENCES:
patent: 1103035 (1914-07-01), Clark
patent: 2802453 (1957-08-01), Harp et al.
patent: 2905441 (1959-09-01), Poundstone
patent: 3353429 (1967-11-01), Stuart
Durr, A. and Wachter, O., Hydraulik in Werkzeugmaschinen, Carl Hansesr Verlag, Munich, Germany, 1968, pp. 21-23.
Index-Werke Komm. -Ges. Hahn & Tessky
Lipsitz Barry R.
Schultz Robert
Schwartz Larry I.
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