Rotary cutting tool having irregular insert orientation

Details Rotary cutting tool having irregular insert orientation Rotary cutting tool having irregular insert orientation

2008-07-15

2008-07-15

Fridie, Jr., Willmon (Department: 3722)

Cutters, for shaping

Rotary cutting tool

Including holder having seat for inserted tool

C407S056000, C407S058000

Reexamination Certificate

active

07399146

ABSTRACT:
A rotary cutting tool such as a helical end mill, having pockets arranged to overcome harmonic vibrations. The tool has at least two and in one embodiment all three of three spacing irregularities. In the first irregularity, columns of pockets, typically associated with flutes, are staggered circumferentially out of even spacing. In a preferred embodiment having three flutes, the flutes are mostly not centered on one hundred twenty degree intervals. In the second irregularity, at least some pockets are arranged at different radial rake angles. In the third irregularity, at least some pockets are arranged at different axial rake angles.

REFERENCES:
patent: 4092082 (1978-05-01), Severson
patent: 4093392 (1978-06-01), Hopkins
patent: 4302135 (1981-11-01), Lillie
patent: 4844666 (1989-07-01), Tsujimura et al.
patent: 5800098 (1998-09-01), Satran et al.
patent: 5913644 (1999-06-01), DeRoche et al.
patent: 5947649 (1999-09-01), Arai et al.
Twincut 45 Degree “Advantage”, Ad, Leitz Metalworking Technology Group, Printed Oct. 27, 2003, 2 pages.

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