Measurements and Standards of The Positioning Accuracy of The CNC Machine Tools
ABSTRACT
With the popularization of the CNC machine tools in CHINA, to find out the real performances of them, it is necessary to perform some measurements of positioning accuracy and make correct eva luations to the relating data. In the text, the popularization of the CNC machine tools in CHINA is introduced. Also introduced are the definition and importance of the positioning accuracy, with the positioning accuracy error and common measuring items included. Followed are the common measuring methods and the relating standards of the CNC machine tools described in details. After that, compare the differences between the four different standards thoroughly, using forms, graphs and words. Drew conclusions based on the forms, graphs and words mentioned above. Certified the conclusions with the data captured in the school laboratory tested one CNC machine tools. Through the study of the subject, the differences between the standards of positioning accuracy of the CNC machine tools are reported and made a answer to the problems concerning the debates aroused by the differences of the standards.
KEY WORDS:CNC Machine Tools, Positioning Accuracy, Measurements of Positioning Accuracy, Interferometer, Standard