US 12,434,309 B2
Milling cutter and blade part thereof
Naoya Honda, Niwa-gun (JP); and Hirooki Narita, Niwa-gun (JP)
Assigned to KANEFUSA KABUSHIKI KAISHA, Niwa-gun (JP)
Appl. No. 17/764,095
Filed by KANEFUSA KABUSHIKI KAISHA, Niwa-gun (JP)
PCT Filed Sep. 23, 2020, PCT No. PCT/JP2020/035781
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/060271, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-177998 (JP), filed on Sep. 27, 2019.
Prior Publication US 2022/0371109 A1, Nov. 24, 2022
Int. Cl. B23C 5/22 (2006.01); B23Q 11/10 (2006.01); B23C 5/28 (2006.01)
CPC B23C 5/2204 (2013.01) [B23C 5/28 (2013.01); B23C 2210/02 (2013.01); B23C 2210/244 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A milling cutter comprising:
a blade part having a plurality of tips each provided with an end cutting edge and a peripheral cutting edge, and a blade-body portion which is a plate-shaped body with the plurality of tips fixed to an outer circumference thereof and has a groove in accordance with a position of each tip;
a body being rotatable around a rotational axis and transmitting a rotational driving force to the blade-body portion from outside, the body having a front-end portion, the front-end portion having a front-end surface to which a rear-end surface of the blade-body portion is fixable detachably and in close contact therewith, and a front-end outer-circumferential portion whose outer diameter is 100/100 to 97/100 using an outer diameter of the blade-body portion as a reference (100/100), the front-end outer-circumferential portion having a body-side groove continuous to the groove of the blade-body portion contacted closely; and
a fastening bolt to be fastened to the body, penetrating through the blade-body portion from a front-end surface side,
wherein the rear-end surface of the blade-body portion is formed to be a flat plane surface, and the blade-body portion is provided with an attachment hole provided at the front-end surface side of the body and having a cylindrical outer peripheral surface around which an attachment seat is fitted to, and a fastening bolt hole provided around the attachment hole for penetrating the fastening bolt therethrough from the front-end surface towards the body for fixing thereto.