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一种供矿山凿岩机使用的55mm×120°球齿形深孔钻头,最近由苏州治金机电修造厂研制成功。经江苏治山铁矿现场试钻鉴定,认为这种新型钻头机械性能良好,并具有定中稳定、钻杆不易摇摆、排渣通畅、孔壁光滑有利装药爆破、坚固耐磨等优点,与原来的焊接式钻头相比,工效可提高百分之三十左右,使用寿命可延长二到三倍,大大降低采矿成本。根据矿山现场记录,该钻头平均钻孔深度达到500米以上,最
A 55mm × 120 ° ball-shaped deep hole drill used for mine rock drill was successfully developed by Suzhou Zhijin Electromechanical Repair Factory. The trial of drilling at the Zhizhan iron mine in Jiangsu shows that the new type of drill has good mechanical properties and stable performance. The drill bit is not easily swayed, the slagging of the drill pipe is smooth, the wall of the hole is smooth and favorable, and the utility model has the advantages of strong abrasion resistance, Compared to the welding drill, the work efficiency can be increased by about 30 percent, the service life can be extended two to three times, greatly reducing mining costs. According to mine site records, the drill average drilling depth of 500 meters or more, most