一、大八角合金三翼大水眼无心钻头 1.结构大八角三翼大水眼无心钻头的结构如图所示。用直径91毫米,壁厚10毫米的钻头料做钻头体。钻头体上镶焊三个厚16毫米翼片。为了提高钻头的抗掰能力和耐磨性,在锥面上用大八角合金。为使合金出刃一致,翼片加工由锻压改为车铣,把三个翼片车成六个阶梯,阶梯 A large octagonal alloy wing big water eyes unintentional drill 1. Structure Big octagonal big eyes Eye Centerless drill bit structure as shown. With a diameter of 91 mm, the thickness of 10 mm bit material to do bit body. Bit body welding three thick 16 mm wing. In order to improve the bit of anti-breaking ability and wear resistance, the cone with a large octagonal alloy. In order to make the alloy out of the same blade, the wing processing by forging to car milling, the three wing car into six steps, ladder