Cutting tool and cutting processing device
A cutting tool is rotatable about an axis line, and includes a main body portion, a cutting insert, and a plurality of anti-vibration members. The main body portion has an inner circumferential surface and an outer circumferential surface opposite to the inner circumferential surface. The cutting insert is attached to at least one of the inner circumferential surface and the outer circumferential surface. Each of the plurality of anti-vibration members is provided at the main body portion. Each of the plurality of anti-vibration members includes a weight member composed of a material having a specific gravity larger than a specific gravity of a material of the main body portion.
1 . A cutting tool rotatable about an axis line, the cutting tool comprising:
a main body having an inner circumferential surface and an outer circumferential surface opposite to the inner circumferential surface;
a cutting insert attached to one of the inner circumferential surface and the outer circumferential surface; and
a plurality of anti-vibration members provided at the main body,
wherein
each of the plurality of anti-vibration members includes a weight member composed of a material having a specific gravity larger than a specific gravity of a material of the main body,
the main body is provided with a plurality of hollow portions each defined by a respective inner wall surface,
each weight member is disposed in a respective hollow portion of the plurality of hollow portions with each weight member being separated from the respective inner wall surface,
each weight member is provided with a through hole,
each of the plurality of anti-vibration members includes
a pin member that extends through the through hole and that is directly attached to the respective inner wall surface, and
at least one elastic member that surrounds the pin member and that is in contact with each weight member in the through hole, and
a longitudinal direction of the pin member is a radial direction of the main body.
2 . The cutting tool according to claim 1 , wherein in a view parallel with the axis line, each of the plurality of anti-vibration members is disposed on an imaginary circle centered on the axis line.
3 . The cutting tool according to claim 2 , wherein in the view parallel with the axis line, the plurality of anti-vibration members are disposed at equal intervals in a circumferential direction of the imaginary circle.
4 . The cutting tool according to claim 1 , wherein in a view parallel with the axis line, an outer shape of the weight member is a racetrack shape, the racetrack shape defined by: a convex arc, an opposing concave arc, a first convexly curved end connecting a first end of the convex arc to a first end of the concave arc, and a second convexly curved end connecting a second end of the convex arc to a second end of the concave arc.
5 . The cutting tool according to claim 1 , wherein:
the at least one elastic member includes a first elastic member at one end of each pin member and a second elastic member at another end of each pin member, and
each of the plurality of anti-vibration members further includes a resin locator surrounding each pin member between the first elastic member and the second elastic member.
6 . A cutting processing device comprising:
the cutting tool according to claim 1 ; and
an adapter that holds the main body portion.