Induction brazing is a metal-joining process that uses an induction coil to generate a magnetic field that heats the base materials and melts a filler metal into the joint. It is faster, safer, greener, and more repeatable than other brazing methods.
Induction brazing copper return bends is a common application for heat exchanger manufacturers. Copper return bends are brazed into copper tubes on an aluminum heat exchanger using brazing filler metal (BFM) rings. The process can be done safely, efficiently, and repeatably with induction heating systems.
How to braze copper return bends with induction heating?
Here are some steps to braze copper return bends with induction heating:
- Prepare the copper tubes and return bends by cleaning them and applying flux to the joint areas.
- Place brazing filler metal (BFM) rings on each return bend. The rings should fit snugly and have a melting point lower than the base metals.
- Position the return bends into the copper tubes on the heat exchanger. Make sure the joints are aligned and have a small gap for capillary action.
- Place an induction coil around the joint area and connect it to an induction heating system. The coil should be close to but not touching the parts.
- Turn on the induction heating system and adjust the power and time settings according to the part size, geometry, and material. The system should heat the parts uniformly and rapidly to melt the BFM rings and fill the joint gap.
- Turn off the induction heating system and remove the coil. Allow the parts to cool naturally or use compressed air to speed up the cooling process.
- Inspect the joints for quality and integrity. The joints should be smooth, shiny, and free of voids or cracks.
What is the reutrn bends induction brazing machine applications？
Return bends induction brazing machine applications are the use cases where induction brazing machines are used to braze return bends, which are U-shaped tubes that connect parallel tubes in a heat exchanger or a refrigeration system. Induction brazing machines can heat the return bends and the tubes quickly and uniformly, and melt the filler metal into the joint gap. This creates a strong, leak-proof, and corrosion-resistant bond between the parts.
Some examples of return bend induction brazing machine applications are:
- Brazing copper return bends to copper tubes on an aluminum heat exchanger for automotive or HVAC applications.
- Brazing steel return bends to steel tubes for hydraulic fittings or valves.
- Brazing brass return bends to copper tubes for solar industry applications.
- Induction brazing machines can be customized to fit different part sizes, shapes, and materials. They can also be integrated with automation systems, such as robots, fixtures, or conveyors, to increase productivity and quality. Induction brazing machines are safer, greener, and more repeatable than other brazing methods, such as torch or furnace brazing.
