Bolt broken method

When various agricultural machinery is working in the field, the traction resistance is large. If the maintenance is improper, it is easy to cause the pulling bolt of the traction device to be pulled off. It is not easy to remove the broken bolts. A method of removing the broken bolts is now provided for reference.

1. First remove the sludge on the surface of the broken bolt. Use the center 铳 to smash the center of the section and then use a drill with a diameter of 6-8 mm to drill the hole at the center of the section. Note that the hole must be drilled through. After the hole is drilled, the small drill bit is removed and replaced with a drill bit of 16 mm in diameter, and the hole of the broken bolt is continuously enlarged and drilled through.

2. Take the electrode with a diameter of 3.2 mm or less and use medium and small current to break the half of the entire length of the bolt from the inside to the outside of the broken bolt. The starting arc should not be too long. So as not to burn through the outer wall of the broken bolt. After welding to the upper end face of the broken bolt, continue to weld a cylinder with a diameter of 14-16 mm and a height of 8-10 mm.

3. After surfacing, hammer the end face with a hammer to make the broken bolt vibrate along its axial direction. The heat generated by the arc and the subsequent cooling plus the vibration at this time will cause the bolt and the body thread. There is a looseness between them.

4. Careful observation When a trace of rust is found to leak from the fracture after tapping, the nut of M18 can be placed on the stud of the surfacing and the two can be welded together.

5, after welding, slightly cool and hot with a plum wrench on the nut to twist around the left and right can also be twisted back and forth with a small hand hammer hit the end of the nut so that the broken bolt can be taken out.

6. After removing the broken bolt, use a suitable wire hammer to machine the thread in the frame to remove rust and other debris. (Lingling)