# US 5,704,737 A · Cutting insert with chip control

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- Number: US 5,704,737 A
- Document ID: US5704737A
- Status: Granted
- Kind: A
- Application number: 08/425,511
- Filed: 1995-04-20
- Granted: 1998-01-06
- Earliest claimed: 1995-04-20
- Assignees: Kennametal Inc.
- Inventors: David B. Alford
- Web page: https://patentgrep.com/patent/US5704737A

## CPC

- B23B 27/045: {with chip-breaking arrangements}
- Y10T 407/235: with integral chip breaker, guide or deflector
- Y10T 407/245: comprising concave surface in cutting face of tool
- Y10T 407/25: including cut off tool
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A cutting insert for grooving operations with chip control features having an insert body with peripheral walls, sides and first and second end walls to define cutting edges within cutting edge regions and adapted for mounting in a pocket of a toolholder assembly. A land extends rearwardly from the end wall and defines a width. A descending wall initiates in the land and terminates in a floor having a forward, a rearward and opposed side edges. A back ramp extends upwardly from the floor rearward edge and terminates at the respective peripheral wall to define a cavity. A pair of projections extend longitudinally along the sides of the cavity to promote chip control and intersect with diagonal side ramps rearward of the cavity. The side ramps may be used to provide a chamfer on the edges of the machined groove.

## Claims

### Claim 1

A cutting insert with chip control features comprising an insert body having
a) first and second generally parallel sides;
b) peripheral walls between and generally perpendicular to said sides with at least one pair of adjacent peripheral walls forming an included angle of 90 degrees or less with one another;
c) at least one cutting edge region, each region having a predetermined width and located at a juncture of a pair of adjacent peripheral walls forming an included angle of 90 degrees or less with each other, each cutting edge region comprising
i) a cutting edge at the juncture of the pair of adjacent peripheral walls;
ii) a land extending rearwardly along one of the pair of adjacent peripheral walls from the cutting edge and defining a width;
iii) a descending wall having a forward portion and opposed side portions, initiating in the land and terminating in a floor having a forward, a rearward and opposed side edges wherein said descending wall terminates at said floor's forward and opposed side edges;
iv) a back ramp ascending from said floor rearward edge, intersecting said descending wall opposed side portions and terminating at said land thereby defining a cavity;
v) a pair of side ramps initiating at the land and extending up and back to a peripheral wall, each side ramp further extending diagonally from the cutting edge region to the outermost width of the insert body; and
vi) a pair of longitudinal projections protruding from the land and located on each side of the cavity extending rearwardly to each of the side ramps;
wherein said insert body is adapted for mounting in a holder with one cutting edge positioned in the holder for cutting operations.