Abstract
In the previous reports, the author proposed a new system, named the Workpiece-Referred Form Accuracy Control System (WORFAC), and confirmed an effectiveness of this method. In the 3rd to 5th reports, this method was applied to the cylindrical turning by an ordinary, lathe and it was found that the WORFAC is useful to improve the cutting accuracy of ordinary lathe and that the simulation and experiment are well consistent. In this report, the WORFAC is applied to face turning and obtained following results : (1) The offset of a sensor in the cutting direction can be heaped up and it may cause to make some errors. It can be avoided if the cutting control is started at the time when a sensor and a tool reach on the same concentric circle on the workpiece surface. (2) Let xs, yg are two dimensional offsets of the sensor from the cutting point on the workpiece surface as xg for the feed direction. The form accuracy is getting better as yg is bigger for the area of xg>yg. (3) At the area of yg≥xg being yg smaller, the form is better. The best position is yg=xg.
