东风—12型手扶拖拉机旋耕机的犁刀轴,由于工作条件恶劣,犁刀轴水封、油封档处易磨损,引起漏水、漏油。以前我们采用堆焊后车加工到规定尺寸的方法修理。这种方法容易使轴变形,修理条件差的地方,更感到麻烦。现在我们改用镶套的办法修理,经使用证明,效果较好。具体做法如下。把需修的犁刀轴水封档(或油封档)原φ50毫米处,在车床上加工到φ36-0.017(或φ41~(-0.017))毫米再用铸铁加工出长18(或20)毫米,外径φ50毫米, Dongfeng -12 walking tractor tillage machine coulter shaft, due to poor working conditions, coulomb shaft seal, seal seals easy to wear, causing water leakage, oil spills. In the past we used the method of repairing after welding to the specified dimensions. This method is easy to make the shaft deformation, poor repair conditions, even more troublesome. Now we use the method of setting the sleeve to repair, the use of proof, the effect is better. Specific practices are as follows. The need to repair the coulter shaft seal (or seal) the original φ50 mm at the lathe to the processing φ36-0.017 (or φ41 ~ (-0.017)) mm and then cast iron processing length 18 (or 20) mm , Outer diameter φ50 mm,