| 摘要 |
The present invention relates to an end mill, primarily for coarse machining of metallic work pieces, comprising an even number of main flutes that spiral around the periphery of the mill, said flutes having a relatively smaller and a relatively larger helix angle relative to the axis of the mill and wherein uneven-numbered main flutes are defined in that they include the smaller helix angle with the axis. Directly at the end face, the distances between peripheral angles of the successive main flutes in the direction of rotation are smaller between the uneven-numbered main flutes and the subsequent even-numbered main flutes than the distances between peripheral angles between the even-numbered main flutes and the subsequent uneven-numbered main flutes. In order to provide an end mill with the features mentioned above which is better able to prevent vibrations of the tool due to intermittent engagement with a work piece, according to the invention all distances between peripheral angles at the end face of the mill are different from one another.
|
