| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a drill for working, and a working apparatus and a method of manufacturing a worked product, which extend the tool life and improve the quality of worked products and the working speed. <P>SOLUTION: The drill 20 for working is equipped with: a cylindrical core drill 21; and a spray portion 25 spraying a liquid from an inner space IS of the core drill 21 toward the tip 211 of the core drill 21. The spray portion 25 has an introductory passage 251 introducing the liquid and a spraying passage 253 connecting the introductory passage 251 with the inner space IS of the core drill 21 and extending with a specified angleΘto the axial direction AX of the core drill 21. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
