| 摘要 |
A metal cutting insert (12) comprising: a) a pair of cutting portions (12a,12b) disposed on either side of a shank portion (12c); b) clamping structure; c) at least one of said cutting portions including forward cutting structure-comprising: i) a forward cutting edge (20); ii) a downwardly sloping surface adjacent said forward cutting edge and centrally located; iii) a pair of ridges located on either side of said channel; iv) the width of said channel decreasing in width for a portion of its extent, said upwardly rising ridges in cooperation with said channel generating localized stiffening of a chip as it proceeds along said ridges; d) a side shelf defined on one side of said cutting portion, comprising: i) a side cutting edge (22a,22b); ii) said cutting edge defined by an upper boundary of a side face defined by said cutting portion; iii) said shelf further defining chip controlling structure; iv) said deflecting surface including a plurality of recesses that are spaced along said side cutting edge; and e) said side cutting edge and forward cutting edge located in a common plane. |
