Automobile body repair mainly includes accident wound repair. Repair methods include shrinkage forming, folding and unfolding, supporting and prying pad resetting. [Shrinkage Forming] After the body stamping parts are subjected to external force, they will be distorted and dislocated, resulting in concave-convex warping, thinning thickness and increasing area. In order to restore the original shape, the stretching center can be heated by flame, and the back can be gradually shrunk to the center of the heating point with a suitable pad. When stretching slightly, cotton yarn can be immersed in cold water to cool. [Folding] Irregular folds are generated on the plate due to collision. The folds can be untied by vehicle support, or the body can be removed for repair. Tap the most convex ridge of the fold and spread it outward. When repairing the wing plate of the car body, you can tie the wire rope to the flat iron, drag it backwards, then remove the wing plate and trim it on the platform. [Body Support and Reset] During towing and recovery, carefully observe the damage of the vehicle and conduct necessary tests. The deformation degree of each part is detected by diagonal measurement, and the appropriate support position and strength are selected. [Assembly and Calibration of Doors and Cabs] When repairing doors and cabs, they should be assembled and debugged. The assembly quality requires that the door should be able to rotate freely when installed in the cab, and there is no pop-up feeling when closing the door. The mating clearance is consistent, and the engagement depth of the locking tongue meets the requirements. By adjusting the distance between the upper and lower door chains, the upper and lower gaps of the front and rear vertical seams are adjusted to be consistent, and the gap between the bottom seam and the door frame beam is 5-6mm. Adjust the stopper, add pads, and add lubricating oil to the slider. , so that the door and cab can be well engaged horizontally.