During the brazing furnace process, the radiator core and AC condenser core undergo similar working principles. Here's an overview of their workings:
1. Preparation: The core consists of a network of tubes and fins. Before the brazing process, the tubes and fins are cleaned to remove any contaminants and oxidation.
2. Flux application: Flux is applied to the joint areas where the tubes and fins intersect. The flux helps remove any remaining oxides and promotes the wetting of the filler metal during brazing.
3. Assembly: The core is assembled by aligning the tubes and fins in the desired configuration.
4. Heating: The assembled radiator core is placed into the brazing furnace. The furnace is heated to a temperature above the melting point of the filler metal but below the melting point of the base metals (tubes and fins). This allows the filler metal to melt and flow into the joint areas.
5. Brazing: As the temperature in the furnace rises, the filler metal melts and flows along the joint areas due to capillary action. The molten filler metal wets the surfaces of the tubes and fins, creating a metallurgical bond when solidified.
6. Cooling and solidification: Once the desired brazing time has elapsed, the furnace is gradually cooled to allow the joint areas to solidify. This cooling process should be controlled to prevent thermal shock and ensure the integrity of the brazed joints.
