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目前在箱体镗孔方面所使用的镗刀,大部分都是用高速钢做的,因此在切削速度上就受到了一定的限制,阻碍了生产率进一步的提高。我厂根据苏联的先进经验,制造出一种能进行高速切削的镗刀。经实际使用证明:效果良好。这种镗刀最适于加工铸铁零件的孔。采用的切削用量是:切削深度t=3～5公厘,走刀量s=0.3～0.4公厘/转,切削速度V=600公尺/分以上。加工后孔的精度可以达到3级。现在把这种镗刀介绍给大家,供工人同志们工作中参考。
Boring boring machine currently used in the box, most of them are made of high-speed steel, so the cutting speed has been limited, hindering the further improvement of productivity. According to the Soviet Union’s advanced experience, I plant to create a high-speed cutting boring knife. The actual use of proof: the effect is good. This boring tool is best suited for machining holes in cast iron parts. Cutting the amount of use are: cutting depth t = 3 ~ 5 mm, the amount of s = 0.3 ~ 0.4 mm / rev, cutting speed V = 600 meters / min or more. After processing the accuracy of the hole can reach 3. Now this boring knife introduced to everyone for the work of workers comrades reference.