We all come into contact with screws from time to time in our daily lives, such as bicycles, electric fans, hair dryers and other appliances. But if the days are long, the screws (nuts) tend to rust, and sometimes they can't be opened with a wrench. What do you do then? Don't worry, let me show you a few methods:

1 shock: for the rusty screws, do not use a wrench to screw hard, in order to prevent the six sides of the screw screw Angle, screw off or screw the wrench. At this time, the hammer can be used to gently shake the handle of the wrench, generally rust screws can be shaken off.

2 Knock: With the edge of the square top hammer, knock the corroded nut, it is easy to make the nut loose. For example, the nut of the fixed bolt at both ends of the bicycle pedal can be tapped according to the thickness of the pedal and the metal structure. The cast iron nut can be slightly stronger, and the plastic nut should be gently tapped. If this does not work, the nut can be easily removed by tapping it in a circular motion with a hammer.

3 Burning: some screw embroidery erosion is very serious, with the above method still does not work, you can use "fire attack". Grill the screws and nuts thoroughly with gas welding oxide flame, and then drizzle a little oil onto the red-hot screws. The purpose of heating a screw is to expand the screw by heat. The purpose of dripping oil is to make the screw shrink rapidly when it is cold, increase the gap between the lead screw and the nut, and the nut can be unscrewed after the oil flows into it. However, use this method with caution if plastic devices are nearby.

4 Punching: some parts of the screw top corrosion out of shape, can not be removed with a wrench, wire cutters, both available impact method. First, use a hammer and a flat screwdriver to impact a V-shaped slot vertically at the top of the screw. Then, adjust the punch Angle and impact along the direction of screw out. After loosening, you can use wire cutters to screw out. "One" word or "ten" word screw slip, can also use this method, combined with wire pliers screw out.

5 Welding: When removing the device, it is common to break the screw. For broken top screw, generally do not use electric drill, because the slightest mistake will drill bad wire hole. A better way is to weld a long piece of iron to the broken wire. The cross section of the iron block is determined by the screw diameter. After the iron block is firmly welded, oil is quickly poured into the welding drip so that the oil wets the nut. After cooling, knock the other end of the iron block back and forth with a small iron cone in the horizontal direction, rotate the iron block when the screw is loose, that is, the broken wire can be spun out.