Holder, cutting tool, and method for manufacturing machined product
AssigneeKYOCERA Corporation
InventorsYouji Kobayashi, Naoki Yukimoto
Life of this patent
Estimating the term…
Abstract
A holder has a square column shape extending from a first end toward a second end. The holder includes a pocket located on a side of the first end, and a first side surface and a second side surface each extending from the first end toward the second end. The second side surface includes a first region that is flat and that is located on the side of the first end, a second region that is flat and that is located closer to the second end than the first region and closer to the first side surface than the first region, and a step connecting the first region and the second region. The step has a convex curve shape toward the second end in a cross section parallel to the first region.
Claims10
A holder having a square column shape extending from a first end toward a second end and comprising:
- a pocket located on a side of the first end and to which a cutting insert is configured to be attached;
- a first side surface extending from the first end toward the second end;
- a second side surface located opposite the first side surface;
- a third side surface located between the first side surface and the second side surface;
- and
- a fourth side surface located between the first side surface and the second side surface and located opposite the third side surface, wherein
- the second side surface comprises
- a first region that is flat and that is located on the side of the first end,
- a second region that is flat and that is located closer to the second end than the first region and closer to the first side surface than the first region, and
- a step connecting the first region and the second region,
- the step has a convex curve shape toward the second end in a cross section parallel to the first region,
- the pocket is open to the first side surface and the third side surface, and
- the step is in contact with the third side surface and the fourth side surface.
A cutting tool, comprising:
- a holder having a square column shape extending from a first end toward a second end and comprising:
- a pocket located on a side of the first end and to which a cutting insert is configured to be attached,
- a first side surface extending from the first end toward the second end,
- a second side surface located opposite the first side surface,
- a third side surface located between the first side surface and the second side surface, and
- a fourth side surface located between the first side surface and the second side surface and located opposite the third side surface;
- and
- a cutting insert located in the pocket, wherein
- the second side surface comprises
- a first region that is flat and that is located on the side of the first end,
- a second region that is flat and that is located closer to the second end than the first region and closer to the first side surface than the first region, and
- a step connecting the first region and the second region,
- the step has a convex curve shape toward the second end in a cross section parallel to the first region,
- the pocket is open to the first side surface and the third side surface, and
- the step is in contact with the third side surface and the fourth side surface.
A method for manufacturing a machined product, the method comprising:
- rotating a workpiece;
- bringing a cutting tool into contact with the workpiece that is rotating;
- and
- separating the cutting tool from the workpiece, wherein
- the cutting tool comprises:
- a holder having a square column shape extending from a first end toward a second end and comprising:
- a pocket located on a side of the first end and to which a cutting insert is configured to be attached,
- a first side surface extending from the first end toward the second end,
- a second side surface located opposite the first side surface,
- a third side surface located between the first side surface and the second side surface, and
- a fourth side surface located between the first side surface and the second side surface and located opposite the third side surface, and
- a cutting insert located in the pocket,
- the second side surface comprises
- a first region that is flat and that is located on the side of the first end,
- a second region that is flat and that is located closer to the second end than the first region and closer to the first side surface than the first region, and
- a step connecting the first region and the second region,
- the step has a convex curve shape toward the second end in a cross section parallel to the first region,
- the pocket is open to the first side surface and the third side surface, and
- the step is in contact with the third side surface and the fourth side surface.
Dependencies are inferred from the claim text.