Insert holder with top clamp

Details Insert holder with top clamp Insert holder with top clamp

1997-08-18

1999-07-13

Pitts, Andrea L.

Cutters, for shaping

Rotary cutting tool

Including holder having seat for inserted tool

407 49, 407 51, 407 53, B23C 520

Patent

active

059217197

ABSTRACT:
A cutting tool insert holder apparatus comprising a milling cutter body with at least one flute and a clamp to secure the insert in the holder and dimensioned to be held by a metal cutting milling machine. The flute is disposed at one end of the body and comprises a pocket dimensioned to accept a rhomboid-shaped cutting insert having a top rake angle and a substantially flat surface in the clamping area, a threaded hole dimensioned to accommodate a clamp screw, a pivot cavity dimensioned to accommodate a pivot of a clamp, and dimensioned to allow tipping of the clamp. In the preferred embodiment, the clamp is sized to accommodate a rhomboid-shaped insert of a specific size and shape and comprises a contact surface dimensioned to contact the flat surface of the cutting insert, a clamp screw hole dimensioned to accommodate the clamp screw and having a centerline which is offset from the centerline of the threaded hole in the flute, a clamp screw dimensioned to pass through the clamp screw hole and be secured in the threaded hole in the flute, a pivot having a radial form dimensioned to mate with the pivot cavity of the flute to prevent axial motion of the clamp when said clamp screw is engaged and to allow the clamp to be tipped to permit indexing of the cutting insert when the clamp screw is released. In operation, the cutting insert is indexed by loosening the clamp screw one-half turn such that the clamp screw remains in the clamp screw hole, tipping the clamp, removing the cutting insert from the pocket, rotating the cutting insert 180.degree., placing the cutting insert back into the pocket, and securing the cutting insert into the pocket by tightening the clamp screw one-half turn.

REFERENCES:
patent: 5033916 (1991-07-01), Dunklau
patent: 5271442 (1993-12-01), Carpenter et al.
patent: 5439039 (1995-08-01), Bradstreet, Jr. et al.
patent: 5649570 (1997-07-01), Kokko et al.

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