Car sheet metal parts are a method of car maintenance, also known as cold work. If the appearance of the car body is damaged and deformed, the process of sheet metal is required. The automobile collision repair has developed from the original “smashing welding and repairing” to the secondary manufacturing and assembly of the car body. The repair of a vehicle in a collision accident is no longer a simple banging of car sheet metal, and the quality of the repair is not good. Just relying on the naked eye to observe the appearance gap of the vehicle, the maintenance personnel must not only understand the technical parameters and dimensions of the car body, but also Master the material properties of the car body, the characteristics of the force transmit the deformation trend and force point of the car body, and the production process of the car body. Such as welding process and so on.
On the basis of mastering this knowledge, maintenance personnel also need to use advanced measuring tools to judge the direct and indirect damage and deformation of the car body through accurate three-dimensional measurement of the car body, formulate a complete car body repair plan, and cooperate with the correct car body repair. The plan is to restore the key points of the body to their original positions.
There are many tools used in automobile sheet metal, such as: leveling hammer for leveling the outer panel; sharp-nosed hammer for finely repairing small protrusions on the outer panel; shrinking hammer can effectively control the metal generated during the leveling process Expansion; rubber hammers with different weights of hammer heads can be used for shaping metal outer plates and structural parts; wooden hammers can effectively inhibit metal expansion when the outer plates are leveled; bolsters are used in conjunction with various sheet metal hammers to give steel plates when knocking Provide support, and shape the steel plate from the back; before repairing the rib line, mark it with a scribe needle, so that the repaired rib line will not “deviate”.
The plate is used to repair the rib line, and the repaired rib line is straight and flat; the ruler can easily judge whether the surface of the steel plate is flat through a “dependence” and a “ratio”; a rough crowbar can be used inside the plate by Roughly reshape the depression from the inside to the outside; the fine crowbar can use the optical principle and the lever principle to repair the vehicle with injury-free paint; the flexible file can easily check the convex parts on the plate, which is convenient for the sheet metal master to carry out subsequent leveling Restoration; Pneumatic belt sander was used to sand old paint on the corners.
There are two types of angle grinders, electric and pneumatic, with the same functions. When used with black diamond grinding discs, the old paint layer on the board surface can be quickly polished without damaging the galvanized layer of the original car; Corrosion; the pneumatic glue gun is used for sealing after the accident car is repaired, which can have anti-corrosion and waterproof effects. With the glue nozzles of different opening shapes, the appearance and texture of the glue produced by the pneumatic glue gun can be roughly similar to the original sealant. There are some other tools that are not listed here.
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