US 12,228,911 B2
Control apparatus of machining device and control method of the same
Junya Matsuda, Aki-gun (JP); Tomonori Saeki, Aki-gun (JP); and Keiichi Shimizu, Aki-gun (JP)
Assigned to Mazda Motor Corporation, Hiroshima (JP)
Appl. No. 17/595,152
Filed by Mazda Motor Corporation, Hiroshima (JP)
PCT Filed Apr. 20, 2020, PCT No. PCT/JP2020/017043
§ 371(c)(1), (2) Date Nov. 10, 2021,
PCT Pub. No. WO2020/235280, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 2019-095454 (JP), filed on May 21, 2019.
Prior Publication US 2022/0260972 A1, Aug. 18, 2022
Int. Cl. G05B 19/4155 (2006.01); B23Q 15/18 (2006.01)
CPC G05B 19/4155 (2013.01) [B23Q 15/18 (2013.01); G05B 2219/35398 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A control apparatus of a machining device processing a first section of a workpiece and a second section in a position which is different from a position of the first section and which is apart from a reference surface of the workpiece in order of the first section and the second section, wherein
the machining device includes:
a coolant supply apparatus which supplies a coolant to the second section of the workpiece during processing work; and
a temperature detection apparatus which detects a temperature of the coolant,
the control apparatus comprises:
a calculation unit which estimates the temperature of the coolant at a time when a predetermined time elapses from a start of the processing work to be a temperature of the workpiece and calculates a deformation amount of the workpiece due to thermal expansion;
a correction unit which corrects a processing position of the second section with respect to the reference surface based on the deformation amount; and
a command unit which starts processing of the second section in the corrected processing position when the predetermined time elapses,
the predetermined time is a time defined in advance from the start of the processing work until a difference between a temperature of a vicinity of the second section of the workpiece and the temperature of the coolant falls within a predetermined range, and
the predetermined range of the difference between the temperature of the vicinity of the second section of the workpiece and the temperature of the coolant is within ±1° C.