| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for preparing an NC program for ensuring a proper feed path of an end mill, including feed speed at each portion of the path, which realizes both high processing efficiency and high processing accuracy, in an NC machine tool employing the end mill as a tool, and to provide an NC unit and a computer program for carrying out the method. <P>SOLUTION: An NC program device 1 converts a desired finished form of an object 5 to be processed into a predetermined fixed processing cycle, according to specified processing requirements including a starting point of processing, an end point of processing and a size of the end mill E to be used. The device 1 then repeatedly calculates the predicted value of cutting force, imposed on the end mill E which is transferred along the feed path assumed in the fixed processing cycle, until a given comparison evaluation between the predicted value and a predetermined proper value results therefrom, and determines the feed path of the end mill E, including a feed speed at each portion of the path. <P>COPYRIGHT: (C)2003,JPO</p> |
