US 11,938,580 B2
Workpiece machining method and workpiece machining device
Koji Tsuchiya, Shizuoka (JP)
Assigned to Shibaura Machine Co., Ltd., Tokyo (JP)
Filed by Shibaura Machine Co., Ltd., Tokyo (JP)
Filed on Nov. 12, 2021, as Appl. No. 17/525,425.
Application 17/525,425 is a continuation of application No. PCT/JP2020/017460, filed on Apr. 23, 2020.
Claims priority of application No. 2019-090654 (JP), filed on May 13, 2019; and application No. 2020-037612 (JP), filed on Mar. 5, 2020.
Prior Publication US 2022/0063040 A1, Mar. 3, 2022
Int. Cl. B23Q 15/22 (2006.01); B23C 5/10 (2006.01); G05B 19/402 (2006.01); G05B 19/4099 (2006.01)
CPC B23Q 15/22 (2013.01) [B23C 5/10 (2013.01); G05B 19/402 (2013.01); G05B 19/4099 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A workpiece machining method for machining a workpiece into a desired shape, comprising:
holding a radius end mill in a tool holding unit, the radius end mill having a corner portion at a lower end formed into an arc shape in a side view and rotating about a rotation axis to perform cutting of the workpiece;
detecting a positional deviation between a real contour line, which is a contour line of the radius end mill, and an ideal contour line, which is a contour line of the radius end mill formed into an ideal shape, when the radius end mill is held by the tool holding unit;
calculating a first correction value configured to make a center of a first arc section formed into an arc shape at a corner portion of the ideal contour line and a center of a second arc section formed into an arc shape at a corner portion of the real contour line to be identical to each other in a plane perpendicular to the rotational axis; and
correcting a machining point by the radial end mill using the first correction value when the cutting is performed.