Cutting tool, insert holder and insert
AssigneeOsg Corporation
InventorsJiro Osawa, Tomonori Yoda
Life of this patent
Estimating the term…
Abstract
Multiple grooves are provided on the outer circumferential surface of the body of an insert holder. A first holding surface of an insert first holding part, which is inserted between a groove bottom and a first protrusion, and a first protrusion surface of the first protrusion make surface contact and said surfaces are sloped so as to approach the groove bottom as the first end is approached. A second holding surface of an insert second holding part, which is inserted between the groove bottom and a second protrusion, and a second protrusion surface of the second protrusion make surface contact and said surface are sloped so as to approach the groove bottom as the second end is approached.
Claims8
A cutting tool secured by a first end to a rotary drive device and rotated about an axis by the rotary drive device to cut a workpiece, comprising:
- a shaft-like insert holder having the first end and a second end at the opposite ends;
- and
- a plurality of inserts detachably held in the insert holder, wherein
- the insert holder includes a body having a plurality of grooves formed on an outer circumferential surface, the grooves being closed on the first end side, and open on the second end side, and
- a lid to be attached to the second end side of the body,
- the inserts include base portions to be inserted into the grooves, and
- cutting portions that cut the workpiece, the cutting portions sticking out from the outer circumferential surface of the insert holder while the base portions are held in the grooves,
- the body includes first projecting portions that are spaced a predetermined distance apart from groove bottoms of the grooves and project from the first end side of the grooves toward the second end,
- the lid includes second projecting portions that, when the lid is attached to the body, are spaced a predetermined distance apart from the groove bottoms, and project toward the first end,
- the base portions include first retaining portions that are interposed between the groove bottoms and first projecting portions, and
- second retaining portions that are interposed between the groove bottoms and second projecting portions,
- the first projecting portions have first projecting faces on, the side of the first retaining portions, the first projecting faces being angled toward the groove bottoms as they extend toward the first end,
- the second projecting portions have second projecting faces on the side of the second retaining portions, the second projecting faces being angled toward the groove bottoms as they extend toward the second end,
- the first retaining portions have first retaining faces making surface-contact with the first projecting faces, and
- the second retaining portions have second retaining faces making surface-contact with the second projecting faces.
Dependencies are inferred from the claim text.