Title:
CUTTING INSERT FOR DRILL, AND DRILL
Document Type and Number:
WIPO Patent Application WO/2019/220778
Kind Code:
A9
Abstract:
A top face includes a first rake face which is continuous with a first cutting edge section, a first side face which is continuous with the first rake face, a second rake face which is continuous with a second cutting edge section, a second side face which is continuous with the second rake face, a flat face section which is continuous with both the first side face and the second side face, a rectilinear first boundary line which is the ridge line between the first side face and the flat face section, and a second boundary line which is the ridge line between the second side face and the flat face section. When viewed in a direction perpendicular to a seat face, the second boundary line has: a first portion which is tilted in the counterclockwise direction relative to the second cutting edge section and which is located between the first boundary line and the point of intersection between the second boundary line and a straight line passing through the center of a mounting hole and perpendicular to the second cutting edge section; and a second portion which is located on the opposite side of the point of intersection from the first portion and which is tilted in the clockwise direction relative to the second cutting edge section.
Inventors:
KAWAKAMI YUMA (JP)
FUKUYAMA TOMOYUKI (JP)
IKENAGA SHINYA (JP)
FUKUYAMA TOMOYUKI (JP)
IKENAGA SHINYA (JP)
Application Number:
PCT/JP2019/012868
Publication Date:
January 09, 2020
Filing Date:
March 26, 2019
Export Citation:
Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP (JP)
International Classes:
B23B51/00; B23B27/14
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
Download PDF:
Previous Patent: AIR CONDITIONING DEVICE FOR VEHICLE
Next Patent: ROTOR AND ROTATING ELECTRICAL MACHINE
Next Patent: ROTOR AND ROTATING ELECTRICAL MACHINE