US 5,411,354 AGranted

Tool provided with an insert for cut-off or similar turning operations, and spacer element for an insert in such a tool

AssigneeSandvik AB

InventorLars-Erik Gustafsson

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Abstract

A cut-of tool comprises a thin holder plate of steel, and a cutting insert of cemented carbide. The holder plate has an outwardly opening, insert-receiving recess defined by a bottom wall, an inner wall and an upper wail which is part of an elastically movable clamping arm serving to retain the insert in the recess. The insert has both upper and lower grooves of V-shaped cross-section, which are adapted to cooperate with corresponding V-shaped ridges associated with the recess. Between the insert and the bottom wall of the recess, there is provided a dismountable spacer element of cemented carbide, which has on its upper side a V-ridge for engaging a corresponding V-groove in the underside of the insert. The spacer element is maintained in place, on the one hand, by a countersunk connecting device in the area of the outer end of the bottom wail and, on the other hand, by a male-female connection between the inner wall of the recess and a rear end of the element.

Claims21

Dependent claims

A tool for cut-off or similar turning operations comprising:

a holder plate, the holder plate having a main portion and a portion forming a clamping arm elastically joined to the, main portion, the holder plate having, in at least one free end thereof, an outwardly opening recess extending into a forward end of the holder plate in a first direction, the recess being substantially defined by a bottom wall, an inner wall, and an upper wall, the bottom wall and the inner wall forming at least a part of the main portion, and the upper wall forming part of the clamping arm;
a cutting insert disposed in the recess in the holder plate;
a spacer disposed between the insert and the bottom wall of the recess;
an upper side of the spacer being formed as a V-shaped ridge and an underside of the insert being formed as a V-shaped groove, the V-shaped ridge and the V-shaped groove extending along an axis in the first direction, the upper side of the spacer engaging with the underside of the insert by the V-shaped ridge being received in the V-shaped groove;
means for engaging the spacer to the holder plate in the area of the bottom wall;
a rear end of the spacer engaging with the inner wall;
and
an upper side of the insert engaging with an underside of the clamping arm.

5 more elements

Dependencies are inferred from the claim text.