1. First, remove the sludge from the surface of the broken screw. Use the center trowel to smash the center of the fracture. Then use a drill with a diameter of 6-8 mm to drill the hole in the center of the section. After the hole is drilled, the small drill bit is removed, and the drill bit with a diameter of 16 mm is replaced, and the hole of the broken bolt is further expanded and drilled.
2. Take the electrode with a diameter of 3.2 mm or less and use medium and small currents to take half of the entire length of the bolt from the inside to the outside of the hole where the broken bolt is drilled from the inside to the outside Of the surfacing. The starting arc during start-up welding should not be too long. So as not to break through the outer wall of the bolt to burn through. Surfacing to the broken end of the bolt before continuing to surpass a diameter of 14 -16 mm 8-10 mm high cylinder.
3.After welding, hammering the end face with a hammer will cause the broken bolt to vibrate the axial direction. Since the heat generated by the arc and the cooling cooling together with the vibration at this time will break the bolt and the thread of The body. Looseness between.
4. Carefully observe that when a trace of rust leaks from the fracture at the time of percussion, the nut of M18 can be set on the screed of the welding and the two are welded together.
5. After soldering, cool and hot, use a box wrench to twist the nut back and forth, and twist it back and forth. Tap the nut face with a small hammer to remove the broken bolt.
6. Take out the broken bolt and use a suitable tap to process the thread in the frame once to remove the rust and other impurities in the hole.