Gear cutting – milling – or planing – Milling – Machine frame
Patent
1991-08-21
1992-11-10
Howell, Daniel W.
Gear cutting, milling, or planing
Milling
Machine frame
384 53, 384 55, 384 57, 408234, B23Q 126
Patent
active
051619261
ABSTRACT:
A precision head (10) for a machine tool includes a ram (12) axially movable along an axis A within an outer stationary ram support (14) of a polygonal shape. The outer stationary ram support (14) includes a pair of fixed bearing portions (16, 17) spaced from each other on one side (18) of the support (14) and a central bearing portion (20) on the other side (22) of the ram support (14) between the fixed bearing portions (16, 17). A pair of adjustable bearings (24, 25) bias the ram (12) against the pair of fixed bearing portions (16, 17). One of the adjustable bearing portions (24) is positioned on the central bearing portion (20) and the other adjustable bearing (25) is positioned in opposed relation to fixed bearing portion (16). The adjustable bearing portion (24) positions ram (12) with respect to the fixed bearing portions (16, 17). Adjustable bearing (25) positions ram (12) with respect to fixed bearing portion (16), whereby the ram (12) is positionable totally with respect to the outer stationary ram support (14) by adjustment of only two adjustable bearings (24, 25).
REFERENCES:
patent: 2378212 (1945-06-01), Siern et al.
patent: 2522695 (1950-09-01), Walter
patent: 2915333 (1959-12-01), Friedman
patent: 3859003 (1975-01-01), Schulz et al.
Howell Daniel W.
Xermac, Inc.
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