JPS6458458A - Working for revolution axis symmetrical curved surface - Google Patents

Abstract

PURPOSE:To permit the working with high accuracy and high efficiency by measuring the shape of a worked surface after the execution of the work in the first time and calculating the tool original point setting error and tool radius error when the worked surface shape error is over a prescribed value and executing the working the next time after correction. CONSTITUTION:An NC controller 14 controls X-Z axis motors 5-7, and carries out the grinding work for the revolution axis symmetrical curved surface of a workpiece 4 by a grinding wheel 12. After the execution in the first time, the shape of the worked surface of the workpiece 4 is measured by an electric type displacement meter 10, and if the error is below a prescribed value, work ing is completed. If the error is over a prescribed value, calculation processing unit 5 calculates the tool original point setting error and the tool radius error on the basis of the error of the shape of the worked surface, and the NC control ler 14 corrects the tool original point and tool radius on the basis of the result of calculation, and the grinding work in the next time is executed by a tool 12 along the corrected tool locus on the basis of the above-described correction. Thus, the revolution symmetric curved surface can be worked with high accu racy and high efficiency.