I believe that many people have encountered the situation that when they wanted to unscrew the screws, they found that the screws were rusted and could not be unscrewed no matter how hard they were unscrewed. Today we will tell you how to easily unscrew the rusty screws, let's take a look!
1. We can first tighten the screw with a wrench, and then hit the handle of the wrench with a hammer. After a few knocks, the rusty part inside will become loose due to the knock, and it will be easy to screw it again. many.
2. You can also use the fire method to burn the screws and nuts with a gas welding oxidizing flame for a while, and then drop a few drops of oil on the red-hot screws to let the screws cool down quickly, which can increase the distance between the screws and the nuts. space between the screws for easy removal.
3. If the screw slips, we can put a small rubber block on it to increase the friction.
4. We can also try to use vinegar to remove the rusty screws. Sprinkling vinegar on a rusty screw will dissolve some of the rust, and it will be easier to wait a while before twisting the rusty screw.
If none of the above methods work, you need to use professional tools.
5. With the help of a nut breaker. The nut breaker is a special tool for cutting and removing rusted nuts that cannot be removed. It is composed of a hydraulic cylinder, a cutter and a knife holder. It adopts the form of a single-acting return hydraulic cylinder, which cuts the nut into two halves at one time, without damaging the threaded thread and screw, and efficiently solves the problem of disassembly and replacement of bolts and nuts.
Specific usage method:
Open the oil filling plug, fill the manual oil pump box with hydraulic oil, and close the unloading valve;
Put the hole in the head of the cutter into the nut to be broken, and put it upright;
Press the manual oil pump to push the riving knife out to the nut. When the riving knife pushes into the nut by half, press the hand pump carefully to avoid excessive force, and the riving knife will quickly split the nut and damage the bolt thread;
When the splitting sound of "beep" is heard, it means that the nut has been broken, that is, stop pressing;
Unscrew the unloading valve, return the splitter to its original position, and take off the splitter to complete the work.
6. Use drop snails. Spiral is a liquid chemical agent that acts on the contact surface between the screw and the tool to increase the contact friction. After use, it can increase the friction force by 500 times, which is more than enough to deal with ordinary dead screws. If it is used with rust remover, lubricant, etc., the effect will be more significant.
7. With the help of thread repair artifact.
Dissect it and take a look.
Adjust and clamp.
One turn, another turn.
Tighten.
8. Use the bolt chamfering tool to chamfer the damaged and corroded bolts.
Rusty bolts with chamfers and nuts on construction site
Bolt chamfers of two different diameters
9. Induction heating method to remove rusty nuts. This method is easy to operate and is suitable for the disassembly or installation of various metal parts, such as driving parts, bearings, bearing housings, gears, bolts, nuts, pipe fittings and small parts. Versatile and suitable for tight spaces.
And it can accurately localize the heating, so that the area outside the heated workpiece still maintains the original temperature; while the heated workpiece will expand and loosen, which is convenient for disassembly or installation. Especially for bolts and nuts, it is an ideal solution.
