Abstract
In the machining centers as well as the turning centers, the herical feed is often used for boring and tapping so that it improves the cutting efficiency. In such machining, the radius of curvature of the herical feed is very small.Therefore, it is important to evaluate the accuracy of such small circles without actual cutting. Although the ISO standards and JIS specify several measurement methods of the circular trajectory, it is difficult to apply those methods to the small circles. In this paper, we newly developed a simple measuement system using two linear gauges and a square for small circles or other complicated tool pathes, and its effectiveness is confirmed through experimental works. Circlar motion tests are conducted on a machining center and an NC lathe by changing the radius from 0.1mm to 20mm using the developed instrument. In addition, the corner tracking trajectories are measured at various feed speeds. As the results, it is concluded that the developed measurement system is suitable for the measurement of the tool path for machining complicated two-dimensional parts.
