Gear cutting – milling – or planing – Milling – With means to dampen vibration
Patent
1978-11-06
1980-09-16
Briggs, William R.
Gear cutting, milling, or planing
Milling
With means to dampen vibration
308 3A, 409231, F16C 2100
Patent
active
042226929
ABSTRACT:
A feed system for machine tools in which rapidly changing cutting forces occur in milling machines with an hydraulic piston drive, a position control system and a carriage supporting either the tool or the workpiece for relative movement. The carriage is movably mounted on guides with preloadable bearings shiftably or swivelably. Dry-running friction bearings on the carriage are equipped with an automatically readjusting pressure arrangement, by means of which an adjustable shifting resistance is generated, which corresponds at least to the magnitude of the cutting force occurring. Preferably, the pressure arrangement consists of a pressure piston which may be acted upon by means of an adjustable pressure. In the case of the use of post guides, the bearings are equipped with three slide surfaces mutually displaced by 120.degree. and the pressure piston acts radially on one of the three slide surfaces. The adjustability of the shifting resistance permits chatter-free milling even when slight masses are to be shifted and the cutting forces change greatly. The slide surfaces of the dry friction bearings have sharp edges acting as wipers, permitting use in highly dusty conditions.
REFERENCES:
patent: 3222991 (1965-12-01), Bone
patent: 3438288 (1969-04-01), Kaiser
patent: 3580135 (1971-05-01), Jones
patent: 3664228 (1972-05-01), Hasz
patent: 3673918 (1972-07-01), Zandl
patent: 3747470 (1973-07-01), Inoue et al.
patent: 3869002 (1975-03-01), Koenig
patent: 4047469 (1977-09-01), Sakata
Briggs William R.
George Fischer Aktiengesellschaft
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