Deep-grooving insert having stepped cutting edge

Details Deep-grooving insert having stepped cutting edge Deep-grooving insert having stepped cutting edge

2005-12-27

2005-12-27

Ashley, Boyer D. (Department: 3722)

Cutters, for shaping

Including holder having seat for inserted tool

With separate means to fasten tool to holder

C407S114000, C407S116000

Reexamination Certificate

active

06979153

ABSTRACT:
A deep-grooving chip-forming cutting insert includes a rear mounting portion, a front cutting portion, and a pair of side walls, each side wall extending along the front and rear portions. The front cutting portion includes a front end surface, a top surface, and a cutting edge disposed at a transition between the front end surface and the top surface and extending from one side wall to the other to define a cutting width. The cutting edge includes a main portion, a pair of convexly curved first corner portions disposed at respective ends of the main portion, and a pair of convexly curved second corner portions offset rearwardly and outwardly with respect to respective first corner portions, wherein a step is formed between each first corner portion and its respective second corner portion. The main portion has a length as viewed in a direction perpendicular to the top surface, and which is at least 80% of the cutting width.

REFERENCES:
patent: 5704737 (1998-01-01), Alford
patent: 5807031 (1998-09-01), Arai et al.
patent: 5975812 (1999-11-01), Friedman
patent: 6799925 (2004-10-01), Ejderklint
patent: 60135104 (1985-07-01), None

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