Cutting tool holder, cutting tool, and method of manufacturing machined product using them
A cutting tool holder may include an upper surface; a first side surface; a second side surface adjacent to the first side surface; a pocket opening into the upper surface, the first side surface, and the second side surface; a first portion located lower than the pocket and protruded outward from the first side surface; and a flow path including an inflow port and an outflow port. The first side surface may include a first recess. The flow path may include a first outflow port opening into the first portion as the outflow port and a first flow path extending from the first outflow port into the holder. The first outflow port is located at a region of the first portion corresponding to the first recess.
1. A cutting tool holder, comprising:
an upper surface;
a first side surface;
a second side surface adjacent to the first side surface;
a pocket opening into the upper surface, the first side surface, and the second side surface;
a first portion located lower than the pocket and protruded outward from the first side surface; and
a flow path comprising an inflow and an outflow,
wherein
the first side surface comprises a first recess,
the flow path further comprises a first outflow port opening into the first portion as the outflow, and a first flow path extending from the first outflow port into the holder, and
the first outflow port is located at a region of the first portion corresponding to the first recess.
2. The cutting tool holder according to claim 1 , wherein
a part of the first outflow port is located in the first recess in a top view.
3. The cutting tool holder according to claim 1 , wherein
the first recess comprises a first end part and a second end part, the first end part located at a side closer to the second side surface than the second end part that is located at a side away from the second side surface in a top view, and
the first outflow port is located closer to a side of the second end part than a midpoint of a straight line connecting the first end part and the second end part in the top view.
4. The cutting tool holder according to claim 1 , wherein the first recess has a curvilinear shape in a top view.
5. The cutting tool holder according to claim 1 , wherein the first recess has a circular arc shape in a top view.
6. The cutting tool holder according to claim 1 , wherein
the first flow path comprises an outflow region extending from the first outflow port and located at the first portion, and
the outflow region is inclined upward as going toward the second side surface.
7. The cutting tool holder according to claim 6 , wherein
the first recess extends in a first direction from the first portion toward the pocket in a plan view of the first side surface, and
the first direction in the first recess intersects with a second direction in which the outflow region is inclined in the plan view of the first side surface.
8. The cutting tool holder according to claim 1 , wherein
the first portion comprises a region in which a distance between the first side surface and an outer edge of the first portion decreases as going toward the second side surface in a top view.
9. The cutting tool holder according to claim 1 , wherein
the first portion comprises a first region and a second region, the second region connecting to the first region and located farther from the second side surface than the first region, and
a distance between the first side surface and an outer edge of the first region decreases as going toward the second side surface, and a distance between the first side surface and an outer edge of the second region is kept constant in a top view.
10. The cutting tool holder according to claim 1 , further comprising:
a second portion located lower than the pocket and protruded outward from the second side surface,
wherein
the second side surface comprises a second recess,
the flow path further comprises a second outflow port opening into the second portion as the outflow port, and a second flow path extending from the second outflow port into the holder, and
the second outflow port is located at a region of the second portion corresponding to the second recess.
11. A cutting tool, comprising:
the cutting tool holder according to claim 1 , and
a cutting insert located at the pocket.
12. The cutting tool according to claim 11 , wherein
a part of the first outflow port is located more inward in the cutting insert than an outer edge of the cutting insert in a top view.
13. The cutting tool according to claim 12 , wherein
a center of the first outflow port is located more inward in the cutting insert than the outer edge of the cutting insert in the top view.
14. A method of manufacturing a machined product, comprising:
rotating a workpiece;
bringing the cutting tool according to claim 11 into contact with the workpiece being rotated; and
moving the cutting tool away from the workpiece.
15. The cutting holder according to claim 1 , wherein
the first portion is also located lower than the first side surface and protrudes beyond the first side surface.