| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a level difference of a machined wall face of a product caused by multi-stage cutting in shoulder machining or groove machining by a throw-away end mill, and thereby to provide a high quality machined wall face with increased roughness of a machined surface. <P>SOLUTION: In a cutting method for shoulder machining multi-stage cutting with respect to a cut material wall face, a throw-away tip is formed so that a rotational trajectory cross section of a major cutting edge 6 cut by a virtual flat surface including the rotary shaft 9 is formed into an approximately circular arc shape W swelled outside from both ends of a side to the center in the direction of the rotary shaft, when the throw-away tip is rotated around a rotary shaft 9 of the holder. The multi-stage cutting of the cut material wall face is performed by only a tip side of the holder out of the major cutting edge of the throw-away tip. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
