| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid pipe drilling method, by which a cutting groove with high dimensional accuracy can be easily drilled in a fluid pipe, a load to a cutting edge of a cutting tool is averaged, and durability of the cutting tool is improved.SOLUTION: The cutting groove 1c is formed which penetrates in a circumferential direction in a substantially rectangular shape in a plane view from above to a part of the fluid pipe 1 through a process of advancing an end mill 9b provided at a front edge of a shaft member 9a rotating around the shaft toward a direction orthogonal to a center axis line of the fluid pipe 1 to drill through a pipe wall of the fluid pipe 1, and thereafter a process of parallel-shifting the shaft of the end mill 9a in a cross direction of the fluid pipe 1. |
