| Summary: | 碩士 === 中原大學 === 機械工程研究所 === 103 === CNC 5-axis machine tools play a very important role in high-precision machining applications. Because assembly accuracy influences the final accuracy of a a-axis machine tool, calibration technology for assembly accuracy between the 2-DOF rotation axes and 3-DOF translation axes is very necessary for manufacturing a 5-axis machine tool, which is also the first threshold to maintain the accuracy of the machine. Per the request of the industry, this study will integrate error analysis, DH-rule, error model development, coordinates homogeneous transformation, measurement trajectory design, on-machine separation measurement, bilateral-communication with CNC controller, ICT, and NC program/human-machine interface development to develop a low-cost and high-efficiency assembly accuracy measurement/calibration method and system for a TTTRR 5-axis machine tool. With use of a low-cost measurement device, the method can measure the geometry errors between the 2-DOF rotation axes and the 3-DOF translation axes, and the location errors of the centers of the 2-DOF rotation axes. Considering measurement efficiency and convenience, a calibration measurement system with function of graphic display for error analysis and a convenient human-machine interface will be built in Visual C# language. The system can also automatically generate a measurement report to hele the user to quickly understand the calibration results and the characteristics of the measured errors. Practical data collection for measurement method development and verification experiments will be conducted on a TTTRR 5-axis machine tool provided by Da-Lih machinery Co.
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