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US 4,929,131 AGranted
Method and apparatus for a lineal machine tool
AssigneeWesthoff Toll and Die Company
InventorJames D. Allemann
Life of this patent
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AssigneeWesthoff Toll and Die Company
InventorJames D. Allemann
Estimating the term…
A cutting tool for a lineal milling machine has a female tapered surface for close tolerance matching to the outer, male tapered surface on the outside of the spindle which mounts the cutting tool to provide the maximum width of support for the cutting edge. The cutting edges comprise a plurality of carbide inserts, each with its own flute formed in the body of the tool, such that as the cutting tool is rotated at high speed an annulus of cutting surface is created which is ideally suited for use with the following method. A new method for lineal machining includes the steps of advancing the cutting tool into the workpiece to form a substantially arcuate edge, retracting the cutting tool from the workpiece, indexing the cutting tool to an overlapping position, and then advancing the cutting tool into the workpiece to remove the amount of overlap, with those steps being repeated to mill pocket openings or for any other lineal milling application.
In a milling machine for lineal machining of metal from a workpiece, the milling machine having means to mount a cutting tool and advance it axially into the workpiece to thereby remove material therefrom, said tool mounting means including a spindle characterized by an outer, tapered annular surface and an axial cavity, the improvement comprising a cutting tool having an axial shank and an inner, tapered annular surface, and wherein said tool mounting means includes means to urge said axial shank into said axial cavity and said tapered surfaces into contact to thereby provide a bearing surface for supporting said tool as the machine is operated.
In a milling machine for lineal machining of a workpiece, the machine including a rotating cutting tool mounted to a tool holder by an axial shank inserting into an axial cavity and an axially mounted draw bolt, the machine having means to advance the cutting tool axially into the workpiece to thereby remove material therefrom, the improvement comprising the tool holder having a generally cone shaped outer surface and means to support the cutting tool from the cone shaped outer surface of the tool holder to thereby support the cutting tool across substantially the entire width of the tool holder to thereby maximize the cutting tool's resistance to rail deflection as it is lineally advanced into the workpiece.
Dependencies are inferred from the claim text.