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发明公开
CN102066028A 钻头 有权

钻头
摘要：
本发明涉及一种钻头，带有端侧(5)和连接在端侧(5)上的周面(19)，其中端侧(5)具有主刀刃(7)，所述主刀刃(7)带有延伸通过钻头(1)的中心轴线(11)的横刀刃(9)，和连接在横刀刃(9)上的向周面(19)延伸的两个主刀刃区域，即第一主刀刃区域(13)和第二主刀刃区域(15)，周面(19)包括至少两个切屑槽(21、23)，所述切屑槽(21、23)在其间界定了第一连接片(25)和第二连接片(27)，在所述连接片上具有三个棱，其中第一棱连接在第一主刀刃区域(13)的背离横刀刃(9)的端部上且用作自由刃棱(33)，此外第一棱具有自由刃(39)，且第二棱连接在第二主刀刃区域(15)的背离横刀刃(9)的端部上且用作引导棱(35)，第三棱用作支承棱(37)。所述钻头的特征在于，引导棱(35)布置在第一连接片(25)上，且支承棱(37)与具有自由刃(39)的自由刃棱(33)一起布置在第二连接片(27)上。
摘要（英）：

The invention relates to a drill having a front side (5) and a circumferential surface (19) adjoining the front side (5), wherein the front side (5) has a main cutting edge (7) comprising a transverse cutting edge (3) extending through a center axis (11) of the drill (1), and having two first and second main cutting edge regions (13, 15) adjoining the transverse cutting edge (9) and extending toward the circumferential surface (19), the circumferential surface (19) comprising at least two chip grooves (21, 23) that define a first and a second bar (25, 27) between them, and three bevels, of which a first bevel adjoins the end of the first main cutting edge region (13) facing away from the transverse cutting edge (9), and serves as a free-cutting bevel (33), and having a free cutting edge (39), and a second bevel adjoins the end of the second main cutting edge region (15) facing away from the transverse cutting edge (9), and serves as a guide bevel (35), a third bevel serves as a support bevel (37). The drill is characterized in that the guide bevel (35) is disposed at the first bar (25), and the support bevel (37) together with the free cutting bevel (33) having the free cutting edge (39) are disposed on the second bar (27).

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