In order to restore the deformed part to its original shape, we must try to shrink the extended part. The shrinkage molding process is as follows:

1) Use the torch flame to heat the drawing center to red, but be careful not to melt or burn through the plate.

2) After heating, tap the periphery of the flushing area quickly, and gradually contract to the center of the heating point, forcing the metal structure to contract.

3) If only one shrinkage can't achieve the purpose of shaping, you can use the same method to perform multi-point shrinkage with each heating shrinkage.

Knockdown correction.

4) When stretching slightly, there is no need to beat after heating, just immerse the cotton yarn in cold water for cooling or naturally cool it.

Zhu huigan

Shoushan

hydraulic ram

Manual labor: manual labor

WW。 M is very happy

Step 2 Fold and unfold

Car body collision may produce irregular folds in stamped metal plates. When repairing, if it is convenient and feasible, you can untie the fold by pulling the cart, and then

Knock flat; If it is inconvenient or infeasible, the car body should be disassembled and repaired under the car. The essentials of pleating: first, try to pry open the dead pleats from the inside.

Remove the live pleat, then heat it, and hit the most convex ridge of the live pleat with a hammer to gradually expand it and restore it to its original state.

3. Pull and reset

Figure 3- 1 shows the commonly used traction tools and equipment. The hydraulic stretching machine pushes the plunger rod away by the pressure generated by the hydraulic cylinder, thus deforming the plate.

Open it. In addition, there is a screw puller with movable hooks at both ends of the screw. When in use, if the iron is stretched and shaped, the iron can rotate.

Tube, so that the screws at both ends are shortened at the same time, one end of the hook is fixed, and the other end of the hook is pulled out.