公开(公告)号：EP3213843A1

公开(公告)日：2017-09-06

申请号：EP15855707.4

申请日：2015-10-16

申请人： NGK Spark Plug Co., Ltd.

发明人： ANDOH, Naoki ,  KOIDE, Minoru ,  FUJIMOTO, Takashi

IPC分类号： B23B27/22 ,  B23B27/04 ,  B23B27/14

CPC分类号： B23B27/04 ,  B23B27/14 ,  B23B27/22

摘要： During grooving or cutting-off, chips are curled into a flat spiral spring shape with no lateral displacement, cut to an appropriate curl length, and then discharged, irrespective of their thickness that varies according to the amount of feed.
Inclined surfaces 51 and 52 are formed on a rake face 40 such that they incline downward toward a central portion between side cutting edges 120, and a recessed groove 60 is formed in the central portion between the inclined surfaces such that the recessed groove 60 extends from the the end cutting edge 110 in the forward-rearward direction. The groove width of the recessed groove 60 gradually increases from the position of the end cutting edge 110 toward the rear, then gradually decreases such that the recessed groove 60 has a narrowest portion at a position P2 forward of the position P3 of an upper end 45 of a breaker wall 43 and rearward of a positive rake angle rear end position P1, and then gradually increases toward the rear up to the position P3 of the upper end 45 of the breaker wall 43. The dimensional relation W1

摘要翻译： 在切槽或切断过程中，切屑被卷曲成扁平的螺旋弹簧形状，没有横向位移，切成合适的卷曲长度，然后排出，而不管其厚度根据进料量而变化。 倾斜表面51和52形成在前刀面40上，使得它们朝向侧切削刃120之间的中央部分向下倾斜，并且在倾斜表面之间的中心部分中形成凹槽60，使得凹槽60从 末端切削刃110在前后方向上。 凹槽60的槽宽度从端部切削刃110的位置朝向后方逐渐增加，然后逐渐减小，使得凹槽60具有在上端45的位置P3前方的位置P2处的最窄部分 并且在正的前角后端位置P1的后方，随后朝向后方逐渐增加至断路器壁43的上端45的位置P3。尺寸关系W1