US 2017/0291233 A1Published application

Cutting tool and a cutting insert for chip-removing tool

AssigneeSandvik Intelectual Property AB

InventorsGilles MARIE, Marc RUE, Jacques GASTHUYS

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Abstract

A cutting tool has a tool body having at least one pocket, at least one cutting insert releasably fixed to the pocket and a fastening device for securing the insert in the pocket. The pocket has a raised portion) with a flat upper support face arranged to be received in a recess of the insert and support the insert by receiving a bottom surface of the recess bearing on the support face. A projecting member of the raised portion has delimiting walls designed to bear against border walls of the recess of an insert for establishing mutual contact therewith and prevent rotation of the insert in the pocket by receiving a rotational moment acting on the insert in an active chip-removing state of the tool.

Claims21

Dependent claims

A cutting tool, comprising:

a tool body having at least one pocket;
at least one cutting insert releasably fixed to said pocket, said insert having a lower surface, a top surface, a surrounding side surface connecting the lower surface and the top surface and at least one cutting edge formed between the top surface and the side surface, said pocket having means at least one support surface configured to provide support to portions of said side surface and a flat support face configured to provide support to at least one portion of said lower surface of said insert;
and
fastening device configured to secure said insert in said at least one pocket while pressing said at least one portion of said lower surface against said support face, said insert having a first engagement member, said at least one pocket including a second engagement member configured to establish mutual engagement of the insert and pocket to prevent rotation of the insert about an insert centre axis extending through said top surface and lower surface of the insert by receiving a rotational moment acting on the insert in an active chip-removing state of the tool, said lower surface of the insert having a central recess with a flat bottom surface, said first engagement member including at least two extended portions of said central recess defined by border walls of said recess and extending further radially from the centre axis than adjacent portions of said central recess, and said second engagement member including at least one fixed projecting member of the pocket configured to project into and be received alternatively in one of said extended recess portions and engage portions of said recess border walls to establish said mutual engagement and enabling indexing of said insert, wherein said pocket of the tool body has a raised portion raised with respect to surrounding pocket portions and having said support face as an upper surface, said raised portion being arranged to be received in said central recess of the insert and supporting the insert by receiving said bottom surface of the central recess bearing on said support face, said at least one projecting member of the second engagement member being formed by said raised portion and having delimiting walls arranged to bear against said recess border walls of said recess portion so as to establish said mutual engagement to prevent rotation.

1 more element

Dependencies are inferred from the claim text.

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Abstract

A cutting tool, comprising:

a tool body having at least one pocket;
at least one cutting insert releasably fixed to said pocket, said insert having a lower surface, a top surface, a surrounding side surface connecting the lower surface and the top surface and at least one cutting edge formed between the top surface and the side surface, said pocket having means at least one support surface configured to provide support to portions of said side surface and a flat support face configured to provide support to at least one portion of said lower surface of said insert;
and
fastening device configured to secure said insert in said at least one pocket while pressing said at least one portion of said lower surface against said support face, said insert having a first engagement member, said at least one pocket including a second engagement member configured to establish mutual engagement of the insert and pocket to prevent rotation of the insert about an insert centre axis extending through said top surface and lower surface of the insert by receiving a rotational moment acting on the insert in an active chip-removing state of the tool, said lower surface of the insert having a central recess with a flat bottom surface, said first engagement member including at least two extended portions of said central recess defined by border walls of said recess and extending further radially from the centre axis than adjacent portions of said central recess, and said second engagement member including at least one fixed projecting member of the pocket configured to project into and be received alternatively in one of said extended recess portions and engage portions of said recess border walls to establish said mutual engagement and enabling indexing of said insert, wherein said pocket of the tool body has a raised portion raised with respect to surrounding pocket portions and having said support face as an upper surface, said raised portion being arranged to be received in said central recess of the insert and supporting the insert by receiving said bottom surface of the central recess bearing on said support face, said at least one projecting member of the second engagement member being formed by said raised portion and having delimiting walls arranged to bear against said recess border walls of said recess portion so as to establish said mutual engagement to prevent rotation.

1 more element