我厂的镗床,其镗刀杆上分布有20mm×20mm或20mm×30mm的方孔,镗刀直接插入孔内,用夹紧螺栓夹紧。对刀时可松动夹紧螺栓,然后向上或向下敲打镗刀,使其达到要求的尺寸。这样的加工方法对于粗加工尚可,但对于精加工则较难,对刀时间长,且精度不好保证。 为了减轻操作者的劳动强度,保证加工质量,我们对原镗刀进行改制,改进后的结构如图所示。 I plant boring machine, the boring bar distribution of 20mm × 20mm or 20mm × 30mm square hole, boring knife directly into the hole, with the clamping bolt clamping. When clamping, loosen the clamping bolt and tap the boring knife up or down to the desired size. This processing method for roughing is acceptable, but for finishing is more difficult, the knife a long time, and the accuracy is not guaranteed. In order to reduce the labor intensity of the operator and ensure the processing quality, we reform the original boring knife, and the improved structure is shown in the figure.