2010 Volume 76 Issue 772 Pages 3261-3267
In recent years, the demand for five-axis control machining centers is getting higher and higher to achieve process integration and high accuracy. On the other hand, it is generally difficult for five-axis control machining centers to realize the same motion accuracy as or higher motion accuracy than three-axis control ones due to the increase in two rotary feed axes in addition to three linear feed axes. Various five-axis control machining centers with suitable constructions have been developed for their effective purposes. At that time, it has been considered that Trunnion type five-axis control machining centers can realize the high motion accuracy relatively easily, based on actual evaluation data and experience. To make sure this fact, a five-axis control machining center which has Table-on-Table type construction, different from Trunnion type, was planned in terms of good operability. Its motion accuracy was measured and compared with the Trunnion type one by use of DBB 5 method. As a result, it is confirmed that Table-on-Table type five-axis control machining center has higher motion accuracy than Trunnion type one as well as good operability.