Reliable Joints for Optimal Heat Transfer
Heat exchangers are essential in many industrial processes, particularly in the energy and refrigeration sectors. Induction brazing of elbows is a key technique for ensuring strong and leak-proof joints, thereby maximizing efficiency in heat transfer.
The brazing of copper elbows on the heat exchanger was performed using an induction generator. This process ensures high-quality brazes with strong and durable joints, which are essential for the proper functioning of heat exchangers.
This application involves the brazing of Ø9.5 mm elbows using a Platinum MF15 generator. The process was carefully controlled with specific equipment and settings to ensure high-quality copper-to-copper welds.
Details of the brazing process:
This process enabled the achievement of excellent welding, characterized by……
The brazing program involves reaching a temperature of approximately 800° C and maintaining it for 5 seconds, the optimal time to allow the alloy to penetrate by capillarity and create the correct meniscus.
After the first brazing the main body is already hot, so the solution of using a power-temperature program is optimal to avoid cold or non-compliant brazings.
It is noted that the induction brazing time tends to stay constant after the first cycle as the temperature of the piece is already stabilized, which is why the quality of the brazing is perfect.
The Platinum MF25 generator (25 kW calibrated at 66% of power) was used for this application, the Ø10mm copper tubes were coupled with the respective copper tube base. We reconstructed a repetitive industrial process, brazing the tubes in sequence without resting the piece. Below we list the results:
The brazing is almost perfect. The times, after brazing the first tube, are significantly reduced since the “support” piece is already at temperature from the previous operations. Inductors made specifically for these tests are suitable for this type of brazing. However, they can still be optimized to specific geometries and the brazes can be further improved.
The customer is our focus: it is the commitment to excellence that we carry forward at Seit Elettronica.
In our company we have always considered customers at the center of our development and sales processes. We are convinced, in fact, that only a methodical approach that brings out critical issues and needs within production processes generates added value and successful investments.
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