Cutters – for shaping – Including chip breaker – guide or deflector detachable from... – Adjustable relative to cutting edge
Patent
1993-10-22
1996-07-23
Rachuba, M.
Cutters, for shaping
Including chip breaker, guide or deflector detachable from...
Adjustable relative to cutting edge
B23B 2722
Patent
active
055383670
ABSTRACT:
A metal cutting tool assembly (1) having an automatically adjustable chipbreaker (23) is provided that comprises a cutting insert (11) for cutting a relatively rotating workpiece, a holder (3) for holding the insert (11), an insert driver (5) for applying a cutting force between the insert (11) and the workpiece, a chipbreaker (23) having a surface (27) that is effective in breaking chips (55, 56) of different thicknesses when positioned at different distances from the cutting edge (19) of the insert (11), and a mounting mechanism (30) for movably mounting the chipbreaker (23) onto the holder (3). The mounting mechanism (30) includes a spring (50) for automatically adjusting the distance between the chipbreaking surface (27) of the chipbreaker (23) and the cutting edge (19) of the insert (11) in response to the forces applied to the chipbreaker (23) by the metal chips (55, 56) that result from the cutting operation. The inventive tool assembly allows the same chipbreaker (23) to effectively break chips (55, 56) of widely varying thicknesses which are created when the cutting insert (11) is used to make a variety of different types of cuts in a machining operation.
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The Theoretical Calculation of Naturally Curling Radius Of Chip, Int. J. Mach. Tools Manufact., vol. 29, No. 3 pp. 323-332, 1989.
Power Reduction Through Efficient Chip Control, By James S. Bator, Product Engineer, Kennametal, Inc.
Ashley John P.
Niebauer Kenneth L.
Hansen Kenneth J.
Kennametal Inc.
Porcelli James G.
Rachuba M.
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