| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve ejection properties of chips generated when performing high feed processing of thin-walled materials such as impellers using a multi-edge endmill. <P>SOLUTION: In the multi-edge endmill 1 having a cutting edge part 3 provided with multiple cutting edges and flutes 8 formed between cutting edges that are adjacent in the direction of rotation around a tool axis O, a rake face of the cutting edge is configured by the rake face 6a of an end cutting edge 6 from the tool axis O to the outer circumference of the shank 2; an adjacent rake face 5a of a corner R edge 5 and an adjacent rake face 4a of a peripheral cutting edge 4. Between the rake face 6a of an end cutting edge 6 and the flank face 6b of the end cutting edge 6 that is adjacent on the forward side thereof in the direction of rotation R, a gash 7, which configures a space that is continuous with the flutes 8, is formed, and the rake face 6a is made to serve as one surface configuring the gash 7. The rake face 5a of the corner R edge 5 is made to straddle between the flank face 6b of the end cutting edge 6 and the flank face 5b of the corner R edge 5 in a radial direction. <P>COPYRIGHT: (C)2013,JPO&INPIT |
