Title:
DRILL AND MANUFACTURING METHOD FOR DRILLED HOLE PRODUCT
Document Type and Number:
Japanese Patent JP2022042909
Kind Code:
A
Abstract:
To highly accurately drill a hole in a work material made of a material such as a composite material or a metal, not only when the rigidity of the main shaft of a drilling machine is sufficient, but also when drilling is performed by a hand-held tool rotating device or the rigidity of the main shaft of the drilling machine is low.SOLUTION: A drill has: a first cutting edge that is formed on a leading-end side so that a clearance angle decreases continuously or intermittently from the leading-end side toward a rear-end side while a leading-end angle decreases continuously or intermittently from the leading-end side toward the rear-end side; a second cutting edge which is for performing a finishing process on a lower hole by being formed at a position separated from the first cutting edge toward the rear-end side, the second cutting edge having a clearance angle at a maximum diameter position; and a shake preventing portion that is formed between the first cutting edge and the second cutting edge and reduces shake of the second cutting edge by being inserted into the lower hole processed by the first cutting edge.SELECTED DRAWING: Figure 10
More Like This:
| WO/2010/143595 | DRILLING TOOL |
| WO/1997/019271 | STEADY PIN FOR JOINTING WOOD PARTS AND ITS MANUFACTURING AND ASSEMBLING PROCESS |
Inventors:
WATANABE MASAO
SUGAWARA HIROYUKI
NAKAHATA TATSUO
ONO RYOHEI
MATSUO SHINYA
TAKAHASHI HIDEJI
SUGAWARA HIROYUKI
NAKAHATA TATSUO
ONO RYOHEI
MATSUO SHINYA
TAKAHASHI HIDEJI
Application Number:
JP2020148602A
Publication Date:
March 15, 2022
Filing Date:
September 03, 2020
Export Citation:
Assignee:
SUBARU CORP
International Classes:
B23B51/00; B23B45/14
Attorney, Agent or Firm:
Takehiko Yamada