CONTACT POSITION DETECTING METHOD, AND MACHINING DEVICE

WIPO Patent Application WO/2024/053127

A1

According to the present invention, a control device: causes a main shaft to rotate through a prescribed angle in a first direction from an initial rotational position, and acquires a first detected value relating to control of a motor at a plurality of rotational positions (S12); causes the main shaft to rotate through the prescribed angle in a second direction, which is the opposite direction to the first direction, to return the rotational position of the main shaft to the initial rotational position (S14); causes the main shaft to rotate in the first direction from the initial rotational position, to cause a tool to come into contact with a workpiece at a timing at which the angle through which the main shaft has rotated from the initial rotational position does not exceed the prescribed angle, and acquires a second detected value relating to control of the motor at a plurality of rotational positions (S16); derives a difference value between the second detected value and the first detected value acquired at the same rotational position (S18); and detects a position of contact between the tool and the workpiece on the basis of a variation in the difference value derived at a plurality of rotational positions (S20).

SHAMOTO EIJI (JP)
LEE KYUNGKI (JP)
HAYASAKA TAKEHIRO (JP)

PCT/JP2023/002880

March 14, 2024

January 30, 2023

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NATIONAL UNIV CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM (JP)

B23Q17/22; B23B25/06

WO2022162927A1	2022-08-04
WO2020174585A1	2020-09-03

JPH10286743A	1998-10-27
JPH1133882A	1999-02-09
JP2008105134A	2008-05-08
JPH08118103A	1996-05-14

MORISHITA Sakaki (JP)

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