Cover for cutting tool, holder for cutting, and cutting device
AssigneesSubaru Corporation, Dmg Mori Seiki Co., Ltd., Mitsubishi Hitachi Tool Engineering, Ltd.
InventorsHisayuki Oode, Shinya Matsuo, Manabu Saito, Morihiro Hideta, Koji Sato, Yasuhiro Inamasu, Shoujirou Touma
Life of this patent
Estimating the term…
Abstract
A cutting tool cover set to a cutting tool which includes a hollow shaft body and at least one insert attached to an end face of the shaft body and cuts by bringing the insert into contact with a work while rotating the shaft body. The cutting tool cover includes: a body portion fixed to a top end portion of the shaft body; and an extension portion extended outward from the circumferential edge of the body portion in the entire circumference of the top end portion of the body portion to cover the surface of the work.
Claims23
A cutting tool cover that is configured to be set to a cutting tool, which cutting tool includes a shaft with a hollow shaft body and at least one insert attached to an end face of the shaft body and cuts by bringing the at least one insert into contact with a work while rotating the shaft body, the cutting tool cover comprising:
- a body portion configured to be fixed to a portion of the shaft body so as to fixedly rotate with the shaft body, said body portion having an internal conduit defined by an internal wall of the body portion, which internal wall is configured to be positioned radially inward of an outer peripheral extremity of the end face of the hollow shaft body;
- and
- an extension portion extended outward from a circumferential edge of the body portion over an entire circumference of the body portion and being configured to be axially fixed in position relative to the shaft so as to preclude axial adjustment, relative to the shaft, of a face of the extension surface that is most proximate to a contact surface of the work, and said extension portion is configured as to extend over the contact surface of the work when being cut and to extend radially outward of the outer peripheral extremity of the end face of the hollow shaft body, and said extension portion being formed of a material having a thermal conductivity value of at least 150W/m·K.
A cutting tool cover that is configured to be set to a cutting tool, which cutting tool includes a shaft with a hollow shaft body and at least one insert attached to an end face of the shaft body and cuts by bringing the at least one insert into contact with a work while rotating the shaft body, the cutting tool cover comprising:
- a body portion configured to be fixed to a portion of the shaft body so as to fixedly rotate with the shaft body;
- and
- an extension portion extended outward from a circumferential edge of the body portion over an entire circumference of the body portion, and being configured to be axially fixed in position relative to the shaft so as to preclude axial adjustment, relative to the shaft, of a face of the extension surface that is most proximate to a contact surface of the work, and said extension portion is configured as to extend over the contact surface of the work when being cut and extend radially outward of the at least one insert, and wherein the face of the extension portion that is most proximate to the contact surface of the work is a tapered surface that gradually separates from the work such that an outer circumference of the face is closer to the work than a more radially inward portion of the face, and said extension portion being formed of a material having a thermal conductivity value of at least 150 W/m·K.
A cutting holder, comprising:
- a cutting tool which includes a hollow shaft body and at least one insert attached to an end face of the shaft body and cuts by bringing the at least one insert into contact with a contact surface of a work while rotating the shaft body;
- and
- a cutting tool cover set to the cutting tool, wherein
- the cutting tool cover includes:
- a body portion fixed to the shaft body;
- and
- an extension portion extended outward from a circumferential edge of the body portion over an entire circumference of the body portion and is configured as to extend over the contact surface of the work when being cut, and
- the cutting tool further includes at least one channel that extends radially inward from an outer portion of the cutting tool toward a hollow portion of the cutting tool and guides air passing within a radially extending clearance passageway formed between the contact surface of the work and a face of the extension portion, said face extending radially inward from an outer extremity of the extension portion and also extending more horizontally than vertically such that air drawn inward from the outer extremity flows along the face and into the at least one channel such that the at least one channel directs the air flow radially inward into contact with the at least one insert and then farther radially inward as to flow past the at least one insert and into a hollow flow conduit formed in the hollow portion of the cutting tool, which hollow flow conduit receives suction air flow during use of the cutting tool holder.
A cutting apparatus, comprising:
- a cutting tool that includes:
- a shaft with a hollow shaft body;
- and at least one insert releasably attached to an end face of the shaft body and cuts by bringing the at least one insert into contact with a work while rotating the shaft body;
- a cutting tool cover set to the cutting tool;
- and
- a suction unit which is positioned substantially at a central axis of rotation of the shaft body and which sucks chips generated by cutting with the cutting tool through a hollow portion of the cutting tool, wherein
- the cutting tool cover includes:
- a body portion fixed to the shaft body so as to fixedly rotate with the shaft body;
- and
- an extension portion extended outward from a circumferential edge of the body portion over an entire circumference of the body portion and being configured to be axially fixed in position relative to the shaft so as to preclude axial adjustment, relative to the shaft, of a face of the extension surface that is most proximate to a contact surface of the work, and said extension portion is configured as to extend over the contact surface of the work when being worked, and said extension portion being formed of a material having a thermal conductivity value of at least 150 W/m·K, and
- the cutting tool further includes at least one channel which extends radially to guide air to the hollow portion from an outer circumference of the cutting tool.
Dependencies are inferred from the claim text.