我厂原十字头圆销修理工艺:退套-电探-换新套再压装。但压套时配合尺寸过紧往往裂套,这种退套检查,既费工,又费料。为解决上述矛盾,我们试验成功不退套超声波探伤新工艺。节约工时不计,仅钢套费每月省二千余元。裂纹产生的规律和部位十字头圆销在机车运行中,要承受由于摇杆往复运动产生的交变剪切力和扭矩应力。在这些应力长期作用下,造成圆销镶套部位和油孔外口处的横向裂纹的产生(如图1)。另外因旧工艺中装套时原油孔不易对准,只好另打φ6mm油孔(修理工艺中规定:油孔不准超过二个)。这不仅减弱销壁强度,同时增加了裂 I plant the original crosshead sales repair process: Back - Electric - for new sets and then press fit. However, when the compression sleeve is often too tight with the size of the split, this check-ups, both the work, but also expected the material. In order to solve the above contradiction, we successfully test the new ultrasonic flaw detection process. Excluding working hours, only steel sets charge 2,000 yuan a month. The law of crack generation and cross-section pin in the locomotive operation, to bear the joystick reciprocating motion generated by alternating shear and torque stress. In the long-term effect of these stresses, resulting in the round set of parts and holes at the mouth of the lateral cracks (Figure 1). In addition due to the old process when the set of crude oil hole is not easy to align, had to make another hole φ6mm (repair process provides: no more than two oil holes). This not only weakened the pin wall strength, but also increased the crack