Simple steps to remove broken screws from cold heading machine

screwCold heading machine(Headhead) The screw will suddenly break when it is set. Many people are caught off guard in this situation and cannot remove the broken screw well. The following are the steps to remove the broken screw.
1. First, remove the sludge on the surface of the broken screw. Use a central gun to kill the central gun on the cross section. Then use an electric drill to install a drill bit with a diameter of 6-8 mm and drill holes at the center of the cross section. Be careful to drill through the hole. After the hole is drilled through, remove the small drill bit, replace it with a drill bit with a diameter of 16 mm, and continue to expand and drill through the hole of the broken bolt.
2. Take the welding rod with a diameter of less than 3.2 mm and use a small and medium current to perform surfacing and surfacing in the bolt drill hole from the inside to the outside, and take half of the entire length of the bolt. When starting the surfacing, do not cause too long to avoid burning through the outer wall of the bolt. After surfacing to the upper end face of the bolt, continue to surfacing a cylinder with a diameter of 14-16 mm and a height of 8-10 mm.
3. After surfacing, hammer the end surface with a hand hammer to cause vibration of the broken bolt along its axial direction. Due to the heat generated by the previous arc and subsequent cooling, coupled with the vibration at this time, the breaking bolt will loosen between the broken bolt and the threads of the body.
4. Carefully observe. When you find that a slight amount of rust leaks out from the fracture after the knocking, you can take the nut of the M18 on the surfacing column head and weld the two.
5. After welding, use a plum wrench to twist the nut while it is slightly cool and hot. You can also use a small hand hammer to touch the end surface of the nut while twisting back and forth. In order to remove the broken bolt.
6. After removing the broken bolts, use a suitable wire hammer to process the thread in the frame to remove rust and other debris in the holes.