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How to take out the broken pressure riveting screw or broken bolt skillfully

Riveting screws and bolts are common parts on mechanical equipment, mainly used to link various parts. But in the process of use, sometimes it will break. So, is there any way to skillfully remove the broken rivet screw or broken bolt?


1. Clean the sludge and drill holes with electric drill hand tool set;


①Remove the sludge on the surface of the broken head of the pressure riveting screw;


②. Use the center gun to die the center gun of the section;


③, then use the electric drill to install a small diameter point, and then use a large bit suitable bit to drill the hole in the center of the cross section (note that the hole must be drilled through);


④ After the hole is drilled, remove the small drill bit, replace it with a small diameter point, and then use a larger bit suitable drill bit to continue to enlarge and drill the hole of the broken bolt.

2. Surfacing


① Take the small diameter point and then use the larger electrode. Use a small and medium current to build the weld from the inside to the outside of the drill hole of the broken bolt. Take the half of the entire length of the broken bolt at the beginning of the weld and start the weld. The pilot arc should not be too long to avoid burning through the outer wall of the broken bolt;


②. After surfacing to the upper end surface of the broken bolt, continue to surfacing a cylinder with a small diameter and a large point;

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

④. Carefully observe that when a small amount of rust leaks from the fracture after knocking, you can take the M18 compression rivet nut column on the stud of the surfacing and weld the two together.


⑤. After welding, let it cool and use the plum wrench to turn around the rivet nut column and twist it back and forth. You can also tap the end surface of the rivet nut column with a small hammer while twisting back and forth, so that the broken bolt can be removed.


⑥ After removing the broken bolt, process the screw in the frame with a suitable tap to remove rust and other debris in the hole.