介绍了一种加工小孔用的新结构硬质合金镗刀。——编者通常,硬质合金鏜刀是把硬质合金刀片釺焊在刀杆上制成的,刀片的全长与刀杆連接。这种鏜刀不能用来鏜削小直徑(2～4毫米)的孔,因为釺焊刀片之后,刀头的尺寸比所鏜孔的直徑大,而且减小刀头尺寸也是不可能的,否則这将使刀杆减弱,致使鏜刀受力不大时就損坏,因此,鏜削小直徑的孔很少使用硬 A new structure carbide boring tool for processing holes is introduced. - Editor’s Note: Carbide boring tools are usually made of tungsten carbide inserts welded to the arbor, the entire length of the blade connected to the arbor. This type of boring tool can not be used for boring small diameter holes (2 to 4 mm) because the size of the tool bit is larger than the diameter of the boring hole after brazing, and it is not possible to reduce the size of the bit, otherwise This will weaken the arbor, resulting in damage to the boring tool when it is less stressed, so boring small diameter holes is less likely to be done with hard