Wrinkles and bumps caused by external impact or extrusion, if the damage is light, the metal does not stretch, which is elastic deformation. For heavier damage, the metal will stretch, which is plastic deformation of
New Car. When the impact or extrusion is particularly severe, tearing will occur. The exposed parts of the sheet metal of the
Fuel Car body are likely to have wrinkles and bumps.
Convex surface repair: The repair of the convex surface with large curvature of New Car is shown. For bump damage, hammering or top pulling can be used to repair it. For smaller bump damage, the pad iron can be placed on the back of the low part of the concave part, hammered with a hammer, and the position of the pad iron can be changed accordingly. When the convex part is basically flattened, the concave part will also be mostly restored due to the reaction force of the pad iron. Then observe the overall smoothness of the board surface, and make some minor adjustments in a targeted manner to repair the bump damage.
Larger depression: The Fuel Car pad can be placed on the back of the concave part and directly lifted up with a top support tool. To reduce the lifting force, the depressed part of the New Car can be heated to dark red when necessary. Rebound should be considered when ejecting, which can make it "overcorrected". If there is a large ductile protrusion on the surface, the metal at the extended part can be appropriately shrunk.
If the damaged part of the New Car is difficult to put into the pad, you can drill holes in the depressed part, with as few holes as possible and as small a hole diameter as possible, then fold the wire into a hook shape, buckle it from the hole, and then apply external force to stretch it. When it meets the requirements, pull out the wire, weld the hole, and grind it flat.
