一、前言在本世纪30年代硬质合金焊片钎头用于矿山取代钢钎子以后,得到了迅速的发展,产生了巨大的经济效益。但是70年代以后,由于液压凿岩机的出现和风动凿岩机向着大功率方向的发展,焊片钎头的固有缺陷日趋明显,因此,一种完全摆脱焊接的冷压(或热嵌)型球齿钎头则应运而生。 I. Preface In the 30s of this century, carbide brazing tips were used in mines to replace steel brazing rods, which led to rapid development and huge economic benefits. However, since the 1970s, due to the emergence of hydraulic rock drills and the development of pneumatic rock drill toward high power, the inherent defects of the soldering tips have become increasingly evident. Therefore, a kind of cold-pressed (or hot-embedded) Then came into being.