Cutters – for shaping – Rotary cutting tool – Including holder having seat for inserted tool
Patent
1991-09-16
1993-04-13
Bishop, Steven C.
Cutters, for shaping
Rotary cutting tool
Including holder having seat for inserted tool
33634, 33636, 407 76, 407 83, 407 89, B23C 524
Patent
active
052016137
ABSTRACT:
A single point adjustable triangular carbide cutting insert holder designed to clamp the cutting insert with maximum possibility for regrind or grinding for secondary operations. The insert holder is arranged for use in a milling machine and is collet-mounted by its shank. The jaw clamps can be removed for placement of the cutting insert between them, and are then refitted in the cavity where they are tightened by adjustment of a screw. As the screw is tightened, the jaw clamps are drawn further within the cavity, and are rigidly clamped against the cavity walls by frictional contact. When partially released, the jaws can be rotated within the cavity, enabling direct adjustment of the cutting insert rake and relief angle as desired. The cutting insert is seated between the jaw clamps on a seating cam mounted at an edge of the inner jaw face, such that the exposed portion of the cutting insert is a maximum. Thus, the exposed portion can be reground without removing the cutting insert from the holder, allowing for re-use of chipped, burnt and used up carbide cutting inserts. The ability to re-use "throw away" cutting inserts which have been reground makes the inventive insert holder economically attractive for use in many machining operations. The insert holder can also be used on a lathe, with the addition of a split sleeve on the shank. A feature of the invention is the provision of a gauge accessory to quickly check the cutting edge lead and clearance angle, especially useful with cutting insert regrinds.
REFERENCES:
patent: 2495368 (1950-01-01), Egli
patent: 3341923 (1967-09-01), Kelm
patent: 3911542 (1975-10-01), Friedline et al.
patent: 4220428 (1980-09-01), Suzuki
patent: 4292865 (1981-10-01), Liu et al.
patent: 4389144 (1983-06-01), Sipos
Bishop Steven C.
Langer Edward
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