| 摘要 |
A forming rotary cutting tool (1) in the shape of a Christmas tree, provided with a main body (10) and cutting blades (20a, 20b) provided to the outer periphery of the main body (10), the cutting blades (20a, 20b) alternately having a plurality of convex parts (21a1-21a4, 21b1-21b4) and a plurality of concave parts (22a1-22a3, 22b1-22b3); wherein within a predetermined range from a tool tip part (30), the cutting blades (20a, 20b) are integrated cutting blades (40a, 40b) that are formed integrally with the main body (10), and outside of the predetermined range, and the cutting blades (20a, 20b) are attached cutting blades (50a, 50b) that are formed separately from the main body (10) and attached to the main body (10). |
| 主权项 |
1. A forming rotary cutting tool in a shape of a Christmas tree comprising:
a main body; and cutting blades provided to an outer periphery of the main body, wherein the cutting blades alternately have a plurality of convex parts of which blade tip diameters are changed to be convex along a direction of a tool axis and a plurality of concave parts of which blade tip diameters are changed to be concave along the direction of the tool axis, wherein the maximum blade tip diameter in each convex part is gradually reduced toward a tool tip part and the minimum blade tip diameter in each concave part is gradually reduced toward the tool tip part, and wherein within a predetermined range from the tool tip part, the cutting blades are integrated cutting blades that are formed integrally with the main body, and outside the predetermined range, the cutting blades are attached cutting blades that are formed separately from the main body and attached to the main body. |
