Gear cutting – milling – or planing – Milling – Machine frame
Patent
1994-06-30
1996-01-09
Briggs, William
Gear cutting, milling, or planing
Milling
Machine frame
74 8915, 744248R, 82141, B23Q 540, F16H 2702
Patent
active
054824168
ABSTRACT:
A vertical milling or boring machine has a tool head supporting column which rides on base mounted rails. A ball, screw extends along the base under the column. Each column has a motor driving a nut carried by the ball screw. The nut is caged by the column so that rotation of the nut moves the column along the rails. To prevent ball screw droop, a slidable block is provided on either side of the column which operate as follows. The column pulls one of the these supports along until it latches to a post proximate the middle of the ball screw whereupon this latch overcomes the connection between the column and the slidable support leaving the slidable support latched to the post. When coming back the other way, the column pulls the other slidable support. The column pushes the first support off the post and latches to the first support when the column encounters the first support and leaves the other slidable support latched to the post once the column passes the post. A counterbalance for the tool head comprises three shafts arranged in a triangular configuration, a pulley support mounted for sliding along the shafts, a link from the tool head around the pulley of the pulley support, and an hydraulic cylinder bearing against the pulley support for applying the force to it in order to counterbalance the weight of the tool head.
REFERENCES:
patent: 3643532 (1972-02-01), Moss
patent: 3670583 (1972-06-01), Leming
patent: 4440038 (1984-04-01), Potter
patent: 4572014 (1986-02-01), Kluczynski
patent: 4932279 (1990-06-01), Kasuga
patent: 5251501 (1993-10-01), Katahira
patent: 5425607 (1995-06-01), Hardesty
A catalogue of Zayer, Vitoria, Spain, entitled: "Fixed Table and Floor Type Traveling Column Milling Machines with Numerical Control KM-KC, Electronic Copying Machines KM-KC-BFC, Machining Centers KMU-KCU"; pp. 10 and 11.
Briggs William
Reko International Group Inc.
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