Plate member of cutting tool, tool block, clamp member, and cutting tool
AssigneeTungaloy Corporation
InventorMasahiro Kurokawa
Life of this patent
Estimating the term…
Abstract
A plate member of a cutting tool has two side surfaces being substantially rectangular in shape, a top surface and a bottom surface extending in a direction along a long side of the rectangle, and two end surfaces in a short-side direction. A cutting edge is located on the side of one of the end surfaces. One of the side surfaces is a curved surface bulging outward. The bottom surface has an inclined portion which is inclined with respect to the top surface. The plate member is held by a tool block having a bottom restraining surface which comes into contact with the bottom surface, and is fastened to the tool block by using a clamp member having a top restraining surface which comes into contact with the top surface of the plate member.
Claims12
A cutting tool assembly, comprising:
- a tool block comprising a bottom restraining surface;
- and
- a plate member of a cutting tool seated in the tool block;
- wherein:
- the plate member comprises:
- first and second side surfaces being substantially rectangular in shape in a side view of plate member, each side surface having long and short sides;
- a top surface and a bottom surface extending in a longitudinal direction along the long side, and
- two end surfaces along a direction of the short side, wherein:
- a cutting edge is located on the side of at least one end surface of the two end surfaces,
- the first side surface is a convexly curved surface bulging outward between the top surface and the bottom surface, and
- the bottom surface has an inclined portion which is inclined with respect to the top surface,
- the bottom surface of the plate member is in contact with the bottom restraining surface of the tool block,
- the tool block comprises a side restraining surface;
- the first side surface of the plate member is in contact with the side restraining surface, and
- the side restraining surface has at least two contact portions which come into contact with the first side surface.
A cutting tool comprising:
- a tool block comprising;
- a side restraining surface comprising a first planar contact portion and a second planar contact portion, the first planar contact portion forming an obtuse angle with respect to the second planar portion;
- a bottom restraining surface facing in a direction of the side restraining surface;
- and
- an attachment reference surface for mounting the tool block onto a machine tool;
- wherein:
- the first planar contact portion is located between the second planar contact portion and the bottom restraining surface, in a front view of the tool block;
- and
- a plate member retained in the tool block, the plate member having a substantially rectangular shape in a side view thereof and comprising;
- long top and bottom surfaces extending along a longitudinal direction of the plate member;
- two short end surfaces extending in a direction transverse to the longitudinal direction and connecting the top and bottom surfaces;
- a substantially rectangular first side surface which is convexly curved between the top and bottom surfaces;
- a substantially rectangular second side surface which is concavely curved between the top and bottom surfaces, and the second side surface facing in a direction opposite to that of the first side surface;
- a cutting edge located proximate an intersection of the top surface and one of the two short end surfaces;
- wherein:
- the bottom surface has an inclined portion which is inclined with respect to the top surface;
- and
- a clamp member comprising a top restraining surface;
- wherein:
- the tool block's bottom restraining surface is in abutment with plate member's bottom surface;
- the tool block's first and second planar contact portions are in abutment with two vertically spaced apart portions of the convexly curved first side surface, in said front view of the tool block;
- and
- the clamp member's top restraining surface is in abutment with the plate member's top surface, to thereby fasten the plate member to the tool block.
A tool block for a plate member of a cutting tool, the plate member seated in the tool block, the plate member comprising a bottom surface and a side surface, the tool block comprising:
- a side restraining surface comprising a first planar contact portion and a second planar contact portion, the first planar contact portion forming an obtuse angle with respect to the second planar portion;
- a bottom restraining surface facing in a direction of the side restraining surface;
- and
- an attachment reference surface for mounting the tool block onto a machine tool;
- wherein:
- the first planar contact portion is located between the second planar contact portion and the bottom restraining surface, in a front view of the tool block,
- the bottom surface of the plate member is in contact with the bottom restraining surface of the tool block,
- the side surface of the plate member is in contact with the side restraining surface, and
- the first planar contact portion and the second planar contact portion of the side restraining surface come into contact with the side surface of the plate member.
Dependencies are inferred from the claim text.