US 12,228,906 B2
Calibration method and calibration system for machine tools
Chung-Kai Wu, Taipei (TW); Chin-Ming Chen, Taichung (TW); Chun-Yu Tsai, New Taipei (TW); Chi-Chen Lin, Taichung (TW); Chia-Chin Chuang, Kaohsiung (TW); and Ta-Jen Peng, Taichung (TW)
Assigned to INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW)
Filed by INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW)
Filed on Apr. 12, 2022, as Appl. No. 17/719,133.
Claims priority of application No. 110148670 (TW), filed on Dec. 24, 2021.
Prior Publication US 2023/0205164 A1, Jun. 29, 2023
Int. Cl. G05B 19/401 (2006.01); B23Q 17/22 (2006.01); G05B 19/408 (2006.01)
CPC G05B 19/401 (2013.01) [B23Q 17/22 (2013.01); G05B 19/4086 (2013.01); G05B 2219/37069 (2013.01); G05B 2219/37355 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A calibration method for machine tools, comprising:
providing a workpiece on a machine tool;
rotating the workpiece around a first rotation axis of the machine tool and processing the workpiece by a first machining mode, wherein the first rotation axis is parallel to a main shaft of the machine tool;
measuring a first dimensional error of a shape of the workpiece along directions of a first linear axis and a second linear axis of the machine tool, wherein the first linear axis and second linear axis are perpendicular to the first rotation axis;
calculating a positional error of the first rotation axis according to the first dimensional error of the shape of the workpiece to calibrate a rotation center of the machine tool;
rotating the workpiece around a second rotation axis of the machine tool and processing the workpiece by a second machining mode different from the first machining mode, wherein the second rotation axis is perpendicular to the main shaft of the machine tool;
measuring a second dimensional error of a shape of the workpiece along a direction of a third linear axis of the machine tool, wherein the third linear axis is perpendicular to the second rotation axis; and
calculating a positional error of the second rotation axis according to the second dimensional error of the shape of the workpiece to calibrate another rotation center of the machine tool.