这是一种新式大型钻孔工具,由我院和上海第一石油机械厂、鞍山大孤山铁矿合作研制成功。它具有结构简单、自进力大、节省能量、用小轴压钻大孔等优点。经工业生产试验证明,与原来生产中使用的φ310钻头比较,在f=16～18的矿石中钻孔,钻孔效率提高了22.08％;成本降低了53.27％;钻机振动振幅减小了三分之二,降低了机台的事故率;钻 This is a new large-scale drilling tools, developed by our institute and Shanghai No. 1 Petroleum Machinery Factory and Dagushan Iron Mine in Anshan. It has the advantages of simple structure, self-motivation, energy saving, big hole drilling with small shaft and so on. The industrial production test proves that compared with the φ310 drill used in the original production, the drilling efficiency is increased by 22.08% in the ore with f = 16 ~ 18; the cost is reduced by 53.27%; the vibration amplitude of the drilling rig is reduced by one third Second, reduce the accident rate machine; drill