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US 2014/0212227 A1Published application
Two sided milling tool cutter insert and holder
OwnerMichael Bitnerinventor
Life of this patent
Estimating the term…
Abstract
A milling tool includes a reversible cutter insert with a central opening having two pairs of cutting surfaces and edges. A pair of planar locating shoulders are disposed on each side of the insert, and each shoulder extends between the insert side face and an adjacent one of the cutting surfaces. The plane of each locating shoulder is at an angle to and intersects the longitudinal axis of the insert central opening. A cutter holder has a slot receiving the cutter insert with a pair of planar locating surfaces oriented at the same angle as the insert locating shoulder plane. The holder locating surfaces are abutted with and contact the insert locating shoulders to support the insert and permit one of the pair of insert cutting surfaces and edges extending out of the slot to cut a workpiece.
Claims12
A milling tool comprising:
- a cutter insert having:
- two opposite parallel planar side faces having a central opening, the central opening having a longitudinal axis passing between the side faces in a direction normal to the planes thereof, the cutter insert having an axis of rotation extending between the side faces in a direction normal to the central opening axis;
- first and second pairs of cutting surfaces at opposite ends of the insert along the rotational axis, each of the pairs of cutting surfaces having a cutting edge adjacent a cutting surface, with one cutting edge in each pair of cutting surfaces being on an opposite side of the cutter axis and facing in a direction opposite the other cutting edge in the pair, each pair of cutting surfaces and adjacent cutting edges being capable of cutting a workpiece upon rotation of the cutter insert about the insert rotational axis;
- and
- a pair of planar locating shoulders on each side of the insert, with one shoulder of a pair on one side of the central opening and the other shoulder of a pair on the other side of the central opening, each shoulder extending between the side face and an adjacent one of the cutting surfaces, the plane of each locating shoulder being at an angle to and intersecting the longitudinal axis of the insert central opening;
- and
- a cutter holder rotatable about an axis, the cutter holder having:
- a slot at one thereof containing the holder axis, the slot receiving the insert with the insert rotational axis aligned with the holder rotational axis;
- the slot having opposite parallel planar inside faces contacting the insert side faces, the slot inside faces each having an opening aligned with the insert central opening for receiving a removable fastener to secure the insert within the slot, the first pair of insert cutting surfaces and edges extending out of the slot at the end of the holder and the second pair of insert cutting surfaces and edges being disposed substantially within the slot;
- and
- the slot further having a pair of planar locating surfaces, with one locating surface extending from one of the inside faces and the other locating surface extending from the other of the inside faces, the plane of each locating surface being at the same angle as the insert locating shoulder plane and intersecting the longitudinal axis of the slot central openings, the pair of holder locating surfaces being abutted with and contacting the insert locating shoulders adjacent the second pair of cutting surfaces to support the insert locating shoulder within the holder slot and permitting the first pair of insert cutting surfaces and edges extending out of the slot to cut a workpiece when the milling tool is rotated about the rotational axis,
- the cutter insert being removable from the holder slot, rotatable 180° about the central opening axis and re-securable within the holder slot with the pair of holder locating surfaces being abutted with and contacting the insert locating shoulders adjacent the first pair of cutting surfaces to support the insert locating shoulder within the holder slot and permitting the second pair of insert cutting surfaces and edges to extend out of the slot to cut a workpiece when the milling tool is rotated about the rotational axis.
9 more elements
A milling tool cutter insert comprising:
- an insert body having two opposite parallel planar side faces having a central opening, the central opening having a longitudinal axis passing between the side faces in a direction normal to the planes thereof, the cutter insert having an axis of rotation extending between the side faces in a direction normal to the central opening axis;
- first and second pairs of cutting surfaces at opposite ends of the insert along the rotational axis, each of the pairs of cutting surfaces having a cutting edge adjacent a cutting surface, with one cutting edge in each pair of cutting surfaces being on an opposite side of the cutter axis and facing in a direction opposite the other cutting edge in the pair, each pair of cutting surfaces and adjacent cutting edges being capable of cutting a workpiece upon rotation of the cutter insert about the insert rotational axis;
- and
- a pair of planar locating shoulders on each side of the insert, with one shoulder of a pair on one side of the central opening and the other shoulder of a pair on the other side of the central opening, each shoulder extending between the side face and an adjacent one of the cutting surfaces, the plane of each locating shoulder being at an angle to and intersecting the longitudinal axis of the insert central opening,
- the insert locating shoulders adjacent one pair of the cutting surfaces adapted to be abutted with and contact a pair of complimentary locating surfaces in a cutter holder to support the insert within the holder and permit the other pair of the insert cutting surfaces and associated edges to cut a workpiece when the insert is rotated about the insert rotational axis.
2 more elements
A milling tool cutter insert holder comprising:
- an elongated body rotatable about a longitudinal axis;
- a slot at one of the elongated body containing the rotational axis, the slot adapted to receive a cutter insert with a rotational axis of the cutter insert aligned with the holder rotational axis,
- the slot having opposite parallel planar inside faces, each slot inside face having an opening alignable with a central opening in the cutter insert for receiving a removable fastener to secure the insert within the slot;
- and
- the slot further having a pair of planar locating surfaces, with one locating surface extending from one of the inside faces and the other locating surface extending from the other of the inside faces, the plane of each locating surface being at an angle to and intersecting a longitudinal axis of the slot inside face openings, the pair of holder locating surfaces being adapted to abut and contacting a pair of complimentary locating shoulders on the cutting insert adjacent a pair of cutting surfaces on the cutting insert to support the insert locating shoulder within the holder slot and permit an opposite pair of cutting surfaces and edges on the cutting insert to cut a workpiece when the milling tool is rotated about the holder rotational axis.
2 more elements
A method of using a milling tool comprising:
- providing a cutter insert having two opposite parallel planar side faces with a central opening, the central opening having a longitudinal axis passing between the side faces in a direction normal to the planes thereof, the cutter insert having an axis of rotation extending between the side faces in a direction normal to the central opening axis;
- first and second pairs of cutting surfaces at opposite ends of the insert along the rotational axis, each of the pairs of cutting surfaces having a cutting edge adjacent a cutting surface, with one cutting edge in each pair of cutting surfaces being on an opposite side of the cutter axis and facing in a direction opposite the other cutting edge in the pair;
- and a pair of planar locating shoulders on each side of the insert, with one shoulder of a pair on one side of the central opening and the other shoulder of a pair on the other side of the central opening, each shoulder extending between the side face and an adjacent one of the cutting surfaces, the plane of each locating shoulder being at an angle to and intersecting the longitudinal axis of the insert central opening;
- providing a cutter holder rotatable about an axis, the cutter holder having a slot at one thereof containing the holder axis, the slot adapted to receive the insert with the insert rotational axis aligned with the holder rotational axis, the slot having opposite parallel planar inside faces, the slot inside faces each having an opening alignable with the insert central opening for receiving a removable fastener to secure the insert within the slot, the slot further having a pair of planar locating surfaces, with one locating surface extending from one of the inside faces and the other locating surface extending from the other of the inside faces, the plane of each locating surface being at the same angle as the insert locating shoulder plane and intersecting the longitudinal axis of the slot central openings;
- securing the cutter insert in the holder slot with the pair of holder locating surfaces being abutted with and contacting the insert locating shoulders adjacent the second pair of cutting surfaces so that the first pair of insert cutting surfaces and edges extend out of the slot;
- rotating the milling tool about the rotational axis and cutting a workpiece with the first pair of cutting edges;
- removing the cutter insert from the holder slot;
- rotating the cutter insert 180° about the central opening axis;
- securing the cutter insert in the holder slot with the pair of holder locating surfaces being abutted with and contacting the insert locating shoulders adjacent the first pair of cutting surfaces so that the second pair of insert cutting surfaces and edges extend out of the slot;
- and
- rotating the milling tool about the rotational axis and cutting a workpiece with the second pair of cutting edges.
8 more elements
Dependencies are inferred from the claim text.