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钎头(钻头)是传递能量、直接破碎岩石的刀具,在煤矿掘进中用量很大。我国从五十年代以来,一直使用老式仿苏一字形钎头,使用寿命短,凿岩工效低,因此,研制新型钎头是提高掘进速度的一个重要环节。目前,湖北省七约刃具厂已研制出一种新型一字马蹄形硬质合金钎头,经在f=12～14的岩石中测试,掘进百米仅损耗一个,使用寿命为仿苏一字形钎头的2倍以上。其改进的主要方面是:
Drill bit (bit) is the transfer of energy, direct broken rock tool, a large amount of coal mining. Since the 1950s, China has been using the old imitation of the Soviet Union-shaped drill bits, short service life, low drilling efficiency, therefore, the development of new drill bit is to improve the speed of an important part of driving. At present, Hubei Province, about seven cutting tool factory has developed a new type of horseshoe-shaped carbide drill bit, the rock in the f = 12 ~ 14 test, only one loss of 100 meters heading, the service life of imitation Su-shaped solder 2 times more head. The main aspects of improvement are: