一、前言凿岩机械和钎具是应用于矿山、能源、交通、水电等采掘工程中的机械和工具,全国每年约消耗钎具2万吨。自70年代初液压凿岩机械在凿岩工程使用以来,发展速度非常快。国外有20多个国家的30多家公司生产液压凿岩机械。国内自60年代末开始研制,到1989年底先后有10多种型号的轻、中、重 I. Introduction Drilling machinery and brazing tools are used in mining, energy, transportation, utilities and other mining engineering machinery and tools, the annual consumption of brazing about 20,000 tons. Since the early 70’s hydraulic rock drilling machine used in rock drilling, the development of very fast. More than 30 foreign companies in more than 20 countries produce hydraulic rock drilling machines. Domestic research and development since the late 1960s, there have been 10 kinds of models by the end of 1989, light, medium and heavy