硬质合金刀具刃磨时,最容易产生裂纹。为防止裂纹的产生,我们采用了负刃刃磨法。所谓负刃刃磨法,就是在刀具刃磨前,先在主刃面或副刃面上磨出一条负刃带(附图),以提高刀片强度、增强抗震性、防止大量磨削热导向刀片。经实践证明效果较好,如刃磨YT 15类刀片,刃磨后产生裂纹的仅占12％;YG 8刀片刃磨后产生裂纹的仅占3％。 Carbide knife sharpening, the most likely to crack. In order to prevent the occurrence of cracks, we adopted a negative edge sharpening method. The so-called negative edge sharpening method, that is, before the tool sharpening, the first blade surface or vice edge grinding a negative margin (with photos), in order to enhance the blade strength and enhance the shock resistance to prevent a large number of grinding heat-oriented blade. Proved to be effective, such as grinding YT 15 blade, sharpening cracks only 12%; YG 8 blade sharpening cracks only 3%.