Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 13, 2020 - September 16, 2020
In order to design a feed drive system that performs high-speed and high-precision motion, it is necessary to correctly understand the influence of each mechanical element that constitutes the feed drive mechanism on the characteristics of the entire feed drive system. Therefore, in this study, in order to evaluate the rigidity of the support bearing and the ball-screw nut in the feed drive mechanism under practical condition, an axial force is applied to the table of a feed drive mechanism using a linear motor. The rigidity of the support bearing and ball-screw nut were evaluated by measuring the displacement of each part under several forced conditions. Measurement tests were carried out with different pre-load condition of the support bearing and ball-screw nut. As the results, it is confirmed that influence of the changing of pre-load is adequately evaluated by the evaluation method. Frequency response of the mechanism is also measured and simulated. It was confirmed, however, that the simulated natural frequencies based on the evaluated rigidity were lower than the measured ones.
