Técnica de funilaria e reparos rápidos

501-25-46 Body Repairs - General Information 501-25-46 DESCRIPTION AND OPERATION Des Description FULSW ion 2 Spiral shaped heating pattern If the damage is concentrated in a spot and is in the form of a more rigid raised area, then the carbon electrode must be replaced by a copper electrode. As heat is applied, slightly more pressure is applied to the raised area. In the method using heating by the oxy-acetylene torch, material shrinking is achieved by a combination of heat and mechanical working of the damaged area. TO BE UPDATED LATER Des Description FULSW ion 1 Overstretched area 2 Point heating using the oxy-acetylene torch 3 Spiral shaped knocking back with dolly The repair area must always be accessible from both sides, so that the heated area can be properly worked mechanically. The combination of heating and mechanical working is very effective. As soon as the warm point is established, hammering is immediately started using the aluminum hammer together with a suitable dolly on the inside of the repair surface, working in spiral movements towards the warm point. This causes material to build up in the center of the warmed area. Lead loading Despite good external panel beating techniques, it is not always possible to rectify every surface unevenness. For this reason, application of lead loading is an important part of panel beating. CAUTION: Poisonous gases and dust can be produced when working solder. Use an extraction unit and, if required, a protective mask. NOTE: Since 07/2003, lead compounds have been ruled out for production. Appropriate lead-free tin solders and pastes must also be used in the workshop. Typical application areas: ‡ Body components with limited or no access from the rear. ‡ Body components with very narrow cross-section. ‡ Body components which are particularly exposed or which can move. ‡ Weld seams of partial repairs. ‡ Rocker panel areas, wheel arch edges, side panel areas. ‡ Doors, hood, luggage compartment lid. ‡ Swage lines and joint areas. Tin has the following advantages: ‡ Excellent bonding on bare metal surfaces. ‡ Good moulding properties. ‡ Good properties for the production of shapes and contours. ‡ Permanent shape. ‡ Heat expansion is the same as steel. To create a basis for the actual lead loading process, a lead loading paste is first applied to the panel. The paste is then heated and wiped away with a cloth. Now the tin can be applied and moulded with a brazing block.