我矿使用150A型钻机。钻头为合金柱齿,是嘉兴冶金机械厂出品。几年来使用历史资料考证:新钻头平均使用寿命每个为111.45米。报废原因,主要是钻头键槽易磨损。为了修复再用,我们经过改造废钻头结构,另配一个六角方套(附图),焊接在冲击器上。每修复一个废钻头经费仅38元,只是一个新钻头原价246元的六分之_左右。1980年7月到1981年3月,矿里全部使用了修复的再生钻头,共43个。使用 I mine use 150A type rig. Drill alloy tooth, Jiaxing Metallurgical Machinery Factory produced. Years of historical data using textual research: the average life of the new bit of 111.45 meters each. Reasons for scrap, mainly the bit keyway easy to wear. In order to repair and reuse, we have to transform the waste drill structure, with a hexagonal cube (with photos), welded to the impactor. Each repair a waste bit funding is only 38 yuan, only a new bit 246 of the original six-sixths or so. From July 1980 to March 1981, there were 43 regenerated drill bits repaired in the mine. use