箱体零件孔系的粗镗加工,常用单刀头镗削。在吃刀量较大的情况下,用这种方法,对镗杆、导向套的寿命有很大影响,镗杆和镗套易发生烧死现象,还会使镗杆、导向套等有关零件的圆度、位置度等误差直接反映在工件上,影响了工件的加工精度,生产效率也低。为此,我厂在设计红卫-12和嵩山-6型手扶拖拉机变速箱体粗镗加工时,做了如下改进,效果较好。 Roughing boring machine parts hole system, commonly used single-head boring. In the case of eating a large amount of knife, this method has a great impact on the life of the boring bar, guide sleeve boring bar and boring sleeve prone to burn phenomenon, but also make the boring bar, guide sleeve and other related parts Of the roundness, the degree of position error directly reflected in the workpiece, affecting the accuracy of the workpiece processing, production efficiency is also low. To this end, I plant in the design Hongwei -12 and Songshan-6 walking tractor gearbox rough boring process, made the following improvements, the effect is better.