US 11,986,892 B2
Machining tool
Junya Onose, Tokyo (JP); Ryuji Daikyoku, Tokyo (JP); Akihiro Osawa, Tokyo (JP); Yusaku Kotaki, Tokyo (JP); Tomoya Kuroda, Tokyo (JP); Takayuki Konno, Tokyo (JP); Mayumi Saruyama, Tokyo (JP); Kyoko Tabata, Tokyo (JP); and Kazuya Sakaibara, Tokyo (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Feb. 28, 2022, as Appl. No. 17/681,959.
Claims priority of application No. 2021-060702 (JP), filed on Mar. 31, 2021.
Prior Publication US 2022/0314345 A1, Oct. 6, 2022
Int. Cl. B23C 5/10 (2006.01); B23B 27/22 (2006.01); B23B 51/10 (2006.01)
CPC B23C 5/10 (2013.01) [B23B 27/22 (2013.01); B23B 51/107 (2013.01); B23B 51/109 (2022.01); B23B 2251/48 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A machining tool for machining a workpiece by being rotated about an axis, the machining tool comprising:
a machining blade portion including
a rake face,
a first machining blade arranged in a distal end direction of the machining tool with respect to the rake face, and
a second machining blade arranged with respect to the rake face in a radially outward direction seen from the axis; and
at least one protrusion and at least one second protrusion, wherein each of the at least one protrusion and the at least one second protrusion includes a tip that cuts a chip generated by the first machining blade and is formed on the rake face,
wherein
the at least one protrusion and the at least one second protrusion each have a tapered shape that becomes narrower toward the first machining blade in a plan view with respect to the rake face,
the at least one protrusion and the at least one second protrusion each include
a first side surface that faces in the radially outward direction,
a second side surface that is adjacent to the first side surface and faces in a radially inward direction, and
a top surface that forms an end surface in a protruding direction seen from the rake face,
the tip is formed at a boundary between the first side surface and the second side surface and extends from the top surface toward the first machining blade,
a first ridge line is formed between the first side surface and the top surface,
a second ridge line is formed between the second side surface and the top surface,
the at least one second protrusion is closest to the second machining blade than the at least one protrusion, and includes
an inner forming portion located further radially inward than a reference line that is a line passing through the tip and a point of intersection between first ridge line and the second ridge line and is parallel to the axis and
an outer forming portion located further radially outward than the reference line,
a width of the inner forming portion is larger than a width of the outer forming portion,
the first ridge line is located further radially outward than the reference line, and
the second ridge line is located further radially inward than the reference line.