Simple Measuring of Positioning Accuracy for Machining Centers Using Image Matching
Akinori Saito and Yoji Jimba
1 Nakagawara, Tokusada, Tamura, Koriyama, Fukushima 963-8642, Japan
Machining centers have played a central role in the production field for nearly half a century. Accuracy inspections of machining centers are performed as per ISO standards; however, the accuracy performance of machining centers is often not checked directly after delivery to the factory unless there is a collision between a tool and a workpiece or product failure. Although positioning accuracy is fundamental to the performance of machining centers, the need for expensive laser interferometers and the time required for the setup present barriers to owning and inspecting them. This study proposes a simple method for measuring positioning accuracy that does not require a time-consuming setup of the measurement device or expensive devices. Therefore, the user of the machine tool can own and use the proposed method for daily inspection to identify changes in the positioning accuracy of the numerically controlled machine tool more quickly.
-  ISO 10791-1:2015, “Test conditions for machining centres – Part 1: Geometric tests for machines with horizontal spindle (horizontal Z-axis),” 2015.
-  ISO 10791-4:1998, “Test conditions for machining centres – Part 4: Accuracy and repeatability of positioning of linear and rotary axes,” 2015.
-  ISO 10791-6:2014, “Test conditions for machining centres – Part 6: Accuracy of speeds and interpolations,” 2014.
-  ISO 10791-7:2020, “Test conditions for machining centres – Part 7: Accuracy of finished test pieces,” 2020.
-  D. Maruyama, S. Ibaraki, and R. Sakata, “Measurement of Machine Tool Two-Dimensional Error Motions Using Direction-Regulated Laser Interferometers,” Int. J. Automation Technol., Vol.16, No.2, pp. 157-166, 2022. https://doi.org/10.20965/ijat.2022.p0157
-  J. Miller, S. Fletcher, A. Longstaff, and S. Parkinson, “Simultaneous Constant Velocity Measurement of the Motion Errors of Linear Axes,” Int. J. Automation Technol., Vol.14, No.3, pp. 417-428, 2020. https://doi.org/10.20965/ijat.2020.p0417
-  H. Schwenke, M. Franke, J. Hannaford, and H. Kunzmann, “Error Mapping of CMMs and Machine Tools by a Single Tracking Interferometer,” CIRP Annals, Vol.54, No.1, pp. 475-478, 2005. https://doi.org/10.1016/S0007-8506(07)60148-6
-  Y. Kakino, Y. Ihara, A. Kamei, and T. Ise, “A Study on the Motion Accuracy of NC Machine Tools (1nd Report) – The Measurement and Evaluation of Motion Errors by Double Ball Bar Test,” J. of the Japan Society for Precision Engineering, Vol.52, No.7, pp. 1193-1745, 1998 (in Japanese). https://doi.org/10.2493/jjspe.52.1193
-  Y. Kakino, Y. Ihara, and Y. Nakatsu, “A Study on the Motion Accuracy of NC Machine Tools (2nd Report) – Diagnosis of Motion Error Origins by Using Double Ball Bar Test,” J. of the Japan Society for Precision Engineering, Vol.52, No.10, pp. 1739-1745, 1986 (in Japanese). https://doi.org/10.2493/jjspe.52.1739
-  M. Tsutsumi and A. Saito, “Identification of Angular and Positional Deviations Inherent to 5-axis Machining Centers with a Tilting-rotary Table by Simultaneous Four-axis Control Movements,” Int. J. Mach. Tools & Manufact, Vol.44, pp. 1333-1342, 2003. https://doi.org/10.1016/j.ijmachtools.2004.04.013
-  M. Tsutsumi and A. Saito, “Identification and Compensation of Systematic Deviations Particular to 5-axis Machining Centers,” Int. J. Mach. Tools & Manufact, Vol.43, pp. 771-780, 2003. https://doi.org/10.1016/S0890-6955(03)00053-1
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