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在金属切削中,孔加工约占30％左右。但是,目前大多数的孔加工仍采用高速钢麻花钻头钻孔,内孔车刀扩孔。孔径越大,效率越低。因此,改进孔加工的刀具已引起了国内外的普遍重视。我厂工具车间常年加工轧辊,孔径为φ60、φ70、φ80、φ100和φ120mm,材料为Cr12、GCr15和3Cr2W8合金钢调质料,比较硬。以前用麻花钻头钻孔、车刀扩孔,效率很低。而且钻头刃带经常烧伤,浪费很大。后来,
In metal cutting, hole processing accounts for about 30%. However, most of the hole machining is still used high-speed steel twist drill hole drilling, hole reaming tool reaming. The larger the aperture, the lower the efficiency. Therefore, to improve the hole processing tool has aroused widespread attention at home and abroad. I workshop tooling plant perennial processing roller diameter of φ60, φ70, φ80, φ100 and φ120mm, the material is Cr12, GCr15 and 3Cr2W8 alloy steel conditioning material, relatively hard. Drill bit with a drill before, lathe reaming, low efficiency. And drill bits often burn, a lot of waste. later,