本文介绍了专利产品可转位硬质合金钻-扩两用钻的结构。通过与国外三个刀具公司的可转位硬质合金钻头的对比切削试验,证实了该钻-扩两用钻具有切削平稳、钻孔质量高、分屑可靠、排屑顺畅等优点。刀体既可用于钻一般孔,也可用于钻精孔,还可用于扩精孔。 This article describes the structure of patented indexable carbide drill-double drill. Through the comparison of cutting tests with indexable cemented carbide drill bits of three foreign tool companies, it is proved that the drill-expanding dual-purpose drilling tool has the advantages of stable cutting, high drilling quality, reliable chip breaking and smooth chip discharging. Knife body can be used to drill general holes, can also be used to drill holes, can also be used to enlarge the hole.