Abrading – Ventilation or cooling of tool or tool support
Patent
1998-06-01
1999-10-05
Scherbel, David A.
Abrading
Ventilation or cooling of tool or tool support
B24B 300
Patent
active
059613815
ABSTRACT:
Apparatus is provided for reducing the temperature of a plunge grinding drum to minimize the effects of thermal expansion on the accuracy of the grinding process. The grinding drum has air passages through the interior of the grinding drum. A radiator cylinder is pressed into the inside of the drum. The radiator cylinder has an outside diameter sized so that it can be press fit into the drum. The radiator cylinder has a plurality of radial fins projecting inward. Air is conducted through the grinding drum and picks up heat from the radiator fins. The air then carries the heat out of the grinding drum. The grinding drum has a shaft with a hollow central region for receiving air. The grinding drum has flanges on each end which have openings to allow the air to flow into and out of the grinding drum. At the air inlet, the opening in the flange is preferably at the flange's center. At the air outlet, the openings in the flange are preferably adjacent the radiator fins. Compressed air is injected into the drum at approximately 5 to 10 psi. The air flows from the center of the drum through radial passages in the inlet flange to the axial passages created between the radiator fins. When this occurs, heat is removed from the drum to limit the drum's temperature and as follows the thermal expansion.
REFERENCES:
patent: 3603045 (1971-09-01), Mighton
patent: 4991276 (1991-02-01), Briemont
Alexeev Nikolai M.
Rookey Stephen J.
Enbi Rochester, Inc.
McDonald Shantese
Scherbel David A.
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