目前国内生产的数控线切割机多数是使用钢导轮。然而,钢导轮的磨损速度是相当快的,这就直接影响了加工零件的精度。近年来,陶瓷导轮、蓝宝石导轮的问世,对导轮使用寿命有了较大的提高。但是否可以在导轮的结构上再进行一些改进,来进一步提高其使用寿命呢? 我们在北京四机床厂生产的DK6740型数控线切割机上进行了这方面的试验。是从多槽皮带轮上得到启发,把原来的单“V”形槽改进成双“V”形槽。这样就可以成倍地提 At present, the majority of domestic production of CNC wire cutting machine is the use of steel guide wheel. However, the wear rate of steel guide wheels is quite fast, which directly affects the accuracy of the machined parts. In recent years, the advent of ceramic guide wheel, sapphire guide wheel, the service life of the guide wheel has been greatly improved. However, the structure of the guide wheel can make some further improvements to further improve its service life? We are in the Beijing four machine tool factory production DK6740 CNC cutting machine on this aspect of the test. Inspired by multi-slot pulleys, the original single “V” shaped groove was modified to double “V” shaped grooves. This can be doubled