All kinds of agricultural machinery have large traction resistance when working in the field. If they are improperly maintained, it is prone to pull off the fixing bolts of the traction device. To extract broken bolts is not easy, a method of taking out broken bolts is introduced for reference.
1. First, remove the sludge from the broken surface of the broken bolt. Use a center trowel to smash the center of the fracture and then use an electric drill to drill a drill with a diameter of 6 to 8 mm to drill the hole at the center of the section. Care must be taken to ensure that the hole is drilled. 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 a welding rod with a diameter of 3.2 mm or less and use the small and medium currents to carry out surfacing from inside to outside in the borehole of the broken bolt. For the beginning of surfacing, take half of the entire length of the bolt. When starting welding, do not start the arc too long so as not to burn the outer wall of the broken bolt. After surfacing to the upper end of the broken bolt, a further cylinder with a diameter of 14-16 mm and a height of 8-10 mm is continuously welded.
3. After the welding is completed, hammer the end face with a hand hammer, so that the broken bolt generates vibration in the axial direction. Due to the heat generated by the arc and subsequent cooling, coupled with the vibration at this time, loosening occurs between the broken bolt and the thread of the body.
4. Observe carefully. When traces of iron rust leaking from the fracture are found after tapping, M18 nuts can be placed on the surfacing stigma and the two are welded together.
5. After welding, cool and hot with a box spanner on the nut, twist it back and forth, or twist it back and forth, tapping the nut end face with a small hand hammer, so you can remove the broken bolt.
6. After taking out the broken bolt, use the appropriate silk hammer to process the thread in the frame once to remove the rust and other impurities in the hole.
YT-T14
YT-T14
Shenzhen Sunshine Technology Co.,Ltd , https://www.szyatwin.com