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在开凿岩石工作中,由于对钢钎锻制的技术和钢钎的使用上存在着一些缺点,不仅使得钢钎的消耗量大,而且大大地影响打炮眼的工效,同时也是造成机械凿岩成本高的重要因素之一。在国家钢材供应不足的时候,讨论一下如何减少钢钎消耗的问题,是有必要的。兹提出下列几点意见,作大家的参考。 (一)空心钢钎如何进行锻接机械凿岩,多用六角空心钢来做钢钎,使用到一定的长度(大概半公尺以下)后,就会失去使用的经济性。如以二公尺长一根的钢钎来说,则每根要损失20—25％左右。有时打较深的炮眼因缺乏这样长的钢钎,要用车丝扣的方法来连接。这种方法,不仅费时,且不可靠,给工作带来了不少的困难。实心钢钎与空心钢钎在第三工程局和第六工程局都
In the work of rock excavation, there are some disadvantages in the technology of steel forging and the use of steel brazing. This not only results in a large consumption of steel brazing, but also greatly affects the ergonomics of the blasthole and also the cost of mechanical rock drilling. One of the important factors of high. When the national steel supply is insufficient, it is necessary to discuss how to reduce the consumption of steel brazing. The following points are proposed for your reference. (1) How hollow steel brazing is used for forging mechanical rock drilling, and steel hexagonal hollow steel is used for steel brazing. After a certain length (about half a meter or less) is used, the economical efficiency of use will be lost. If a steel drill with a length of two meters is used, then about 20-25% of each will be lost. Sometimes deeper blastholes are connected due to the lack of such long steel braces. This method is not only time-consuming and unreliable, but also brings many difficulties to the work. Solid steel brazed and hollow steel brazed in the third engineering bureau and the sixth engineering bureau