Joints that come out the same every time, because the heat is placed by a coil and timed by a machine.
Brazing joins two components with a filler metal that melts above 450 degrees Celsius but below the melting point of either parent metal. The filler is drawn into the joint gap by capillary action and solidifies there. Done properly the joint is often stronger than the weaker of the two parent materials.
The hard part is never melting the filler. It is bringing the whole joint to the right temperature at the same moment, holding it long enough for the filler to flow completely, and not overheating anything nearby.
Induction does this by putting a coil around the joint. The coil is wound to the joint’s shape, so the field, and therefore the heat, follows the joint. The cycle is timed by the machine rather than judged by eye.
Against torch brazing: the operator no longer decides the outcome. A torch heats what it is pointed at for as long as it is pointed there, so joint quality follows operator skill and concentration. An induction cycle is set once and repeated.
Against furnace brazing: no batch wait, no fixturing an entire load, and no heating the whole assembly when only the joint needs to be hot. Adjacent seals, bearings, plating or heat-treated regions survive.
Against both: a short cycle means less time at temperature, which means less oxidation, less grain growth and less discolouration to clean up afterwards.
We will confirm the configuration for your material, component geometry and production requirements.
Capillary action needs a gap in a fairly narrow band, typically a few hundredths of a millimetre for most filler and parent combinations. Too tight and the filler will not enter; too loose and capillary action stops working and the joint fills incompletely. This is a design decision made before any machine is chosen.
Frequency sets how thin the heated layer is. Fine joints, thin sections and small assemblies suit high or ultra high frequency, where the energy stays close to the surface. Larger, thicker assemblies want a lower frequency so the heat reaches through the section rather than scorching the outside.
On a manual brazing cell most of the cycle is loading, positioning flux and filler, and unloading. The heating itself is often the shortest part. That is the whole argument for a double station machine: it keeps the power supply working while the operator works.
Send a drawing, the material, the case depth or temperature you need, and your production rate. Our engineers will help define the right machine for your process.
