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7655凿岩机是七十年代定型产品,是目前矿山采掘工业中量大面广的凿岩工具。该产品主要技术指标已达到国外同类产品水平,但其主要基础件使用寿命却比国外低。为了提高基础件的寿命,赶超国外水平,沈阳风动工具厂从1977年就将活塞、螺旋棒、螺旋母、棘轮爪、内棘轮、钎套六个基础件列为攻关项目,他们坚持科学实验,并和矿山工业试验相结合,先后到湖南锡矿山、山东金岭铁矿、辽宁红透山铜矿等单位进行长达913天的工业试验,完成220900米的试验任务,取得可喜成果。
The 7655 drilling rig is a stereotyped product in the 1970s and is currently the most widely used rock drilling tool in the mining industry of the mine. The main technical indicators of this product have reached the level of similar foreign products, but its main components have a shorter service life than foreign countries. In order to increase the life of the basic parts and surpass the standards of foreign countries, Shenyang Fenggong Tools Factory has selected the six basic components of pistons, spiral bars, spiral nuts, ratchet claws, inner ratchet wheels and brazed sleeves as key projects since 1977. They insist on science. The experiment, combined with mine industrial testing, has successively carried out 913-day industrial trials in units such as the Hunan tin mine, the Jinling iron mine in Shandong, the Hongtongshan copper mine in Liaoning, and completed the 220,900-meter test task, which has yielded gratifying results.