How To Remove The Broken Or Rusted Screws?

In our life, screw is a kind of fastener for reinforcement, and also an indispensable industrial necessity in daily life. As long as there is industry on the earth, the function of screw will never disappear. In the process of using the screws, you may encounter the problem that the screws cannot be taken out, but don't worry. Let Xiao Rui take you to see what methods can be used to take out the screws easily.

1. First, remove the sludge on the surface of the broken screw head and punch the center of the section with a central punch, then use an electric drill to install a 6-8mm drill bit to drill holes in the center of the section. Note that the holes must be drilled through. 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 the hole for broken bolts and drill through.

2. Take the electrode with a diameter of less than 3.2 mm and use medium and small current to conduct surfacing welding in the hole of the broken bolt from the inside to the outside. Take half of the entire length of the bolt at the beginning of the surfacing welding. Do not strike the arc too long to avoid burning through the outer wall of the broken bolt. After surfacing to the upper end 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 axis The heat generated by the previous arc and subsequent cooling plus the vibration at this time will loosen the thread between the broken bolt and the body.

4. After careful observation, when it is found that there is a trace of rust leaking from the fracture after striking, take the M18 nut and put it on the stud of surfacing welding and weld the two.

5. After welding, it is slightly cool, while it is hot, use a box spanner to put it on the nut and twist it left and right, or twist it back and forth while striking the end face of the nut with a small hammer, so that the broken bolt can be taken out.

6. After taking out the broken bolt, use a suitable screw hammer to process the screw thread in the rack once to remove rust and other debris in the hole.

Whether it is the tiny screws of electronic equipment, the general screws of furniture and electrical appliances, or even the large screws used in projects, buildings, bridges, transportation appliances, airplanes, trams, cars, etc., screws occupy a very important position in these fields.