US 12,235,620 B2
Controller, control system, and control method of machine tool
Junya Satou, Yamanashi (JP)
Assigned to FANUC CORPORATION, Yamanashi (JP)
Appl. No. 17/906,977
Filed by FANUC CORPORATION, Yamanashi (JP)
PCT Filed Mar. 24, 2021, PCT No. PCT/JP2021/012272
§ 371(c)(1), (2) Date Sep. 22, 2022,
PCT Pub. No. WO2021/193728, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-056665 (JP), filed on Mar. 26, 2020.
Prior Publication US 2023/0176539 A1, Jun. 8, 2023
Int. Cl. G05B 19/402 (2006.01); B23Q 15/12 (2006.01)
CPC G05B 19/402 (2013.01) [B23Q 15/12 (2013.01); G05B 2219/43132 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A controller for controlling a machine tool having a first axis for rotating a tool including a plurality of cutting tools and a second axis for rotating a workpiece and simultaneously rotating the first axis and the second axis to perform polygon machining, the controller comprising:
a machining setting storage unit configured to store the number of cutting tools;
a current phase calculation unit configured to calculate phases of the first axis and the second axis rotating before phase alignment;
a machining-allowing phase calculation unit configured to calculate a phase designated by a machining program and a phase when an angle of the first axis is shifted by an interval of the plurality of cutting tools from the phase designated by the machining program;
an optimum phase calculation unit configured to obtain a phase minimizing a necessary time until phase alignment from a plurality of phases calculated by the machining-allowing phase calculation unit; and
a phase alignment control unit configured to control phases so that the first axis and the second axis rotate at phases adjusted to a phase calculated by the optimum phase calculation unit.