Broach for use in performing machining operations
AssigneeKennametal Inc.
InventorsDavid A. Rigotti, Gregory J. Lavoie
Life of this patent
Estimating the term…
Abstract
A broach comprises an elongate body having a plurality of longitudinally spaced pockets therein. A threaded hole is provided in each of the pockets. The pockets are adapted to receive cutting inserts. The cutting inserts have a hole that is adapted to align with a hole in the pockets. The aligning holes are adapted to receive insert screws. The insert screws are threadably received in the threaded hole in the pockets. When a cutting insert becomes worn or damaged, it may be removed from its pocket and replaced with another cutting insert. Hence, the broach need not be discarded because of a worn or damaged cutting insert.
Claims19
A broach for cutting inserts, said broach comprising:
- an elongate bar having a bottom portion, the bottom portion having a generally tapered profile defined at least in part by two opposing tapered surfaces,
- a plurality of longitudinally spaced pockets in the opposing tapered surfaces, the pockets being staggered so that the pockets in one tapered surface are disposed longitudinally substantially between the pockets in the other tapered surface and a threaded hole in each said pocket,
- wherein each said pocket being adapted to receive a cutting insert having a hole that is adapted to align with a threaded hole in a corresponding one of said pockets, said aligned holes being adapted to receive an insert screw, said insert screw being threadably engageable with said threaded hole.
A broach comprising:
- an elongate bar having a bottom portion, the bottom portion having a generally tapered profile defined at least in part by two opposing tapered surfaces;
- a plurality of longitudinally spaced pockets in the opposing tapered surfaces, the pockets being staggered so that the pockets in one tapered surface are disposed longitudinally substantially between the pockets in the other tapered surface and a threaded hole in each said pocket;
- a plurality of cutting inserts, wherein each said cutting insert received by a corresponding one of said pockets, each said cutting insert having a hole that is adapted to align with said hole in a corresponding one of said pockets;
- and
- a plurality of insert screws, each said insert screw passing through a corresponding one of said cutting insert holes and threadably received by a corresponding one of said threaded holes.
In combination:
- a plurality of broaches each defining a segment, each said broach segment comprising an elongate bar having a bottom portion, the bottom portion having a generally tapered profile defined at least in part by two opposing tapered surfaces;
- a plurality of longitudinally spaced pockets in the opposing tapered surfaces, the pockets being staggered so that the pockets in one tapered surface are disposed longitudinally substantially between the pockets in the other tapered surface and a threaded hole in each said pocket,
- each said pocket being adapted to receive a cutting insert having a hole that is adapted to align with a threaded hole in a corresponding one of said pockets, said aligned holes being adapted to receive an insert screw, said insert screw being threadably engageable with said threaded hole, said segments forming groups comprising:
- a first group of segments adapted to make a wide cut in a work piece, said wide cut having a shallow depth;
- a second group of segments adapted to make a narrower and deeper cut in the work piece than said first group;
- and
- a third group of segments adapted to make a narrower and deeper cut in the work piece than said first and second groups.
Dependencies are inferred from the claim text.