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这种深孔钻,具有不重磨刀具的特点。刀片经过预磨以后,夹固在钻体上。三只刃口因其钻体地位所限,具有三种夹固形式。外刃采用杠杆式,中刃采用偏心式、内刃采用杠销式,支承点上的导向块采用斜楔式,在磨损后可退下重换导向片,整个深孔钻不需焊接,钻体整部可以热处理,以提高其强度,两个导向块起导向作用。该钻头在切削过程中,切削平稳,进给率高,质量好,三个切削刃口采用
This deep hole drilling, with no regrinding tool features. After the blade pre-grinding, the clamp in the drill body. Three cutting edge because of its drill position is limited, with three kinds of clamping form. The outer edge is levered. The center edge is eccentric. The inner edge is made of bar pin. The guide block on the support point is wedge-shaped. After wear, the guide piece can be retreated and replaced, and the entire deep hole drilling need not be welded or drilled The whole body can be heat treated to increase its strength, with two guide blocks acting as a guide. The drill in the cutting process, cutting smooth, high feed rate, good quality, the three cutting edge