Precise and repeatable process to ensure consistency and reliability in high volume production.
Solenoid valves are vital for fluid control across various industrial and automotive sectors. Induction brazing of their internal components is essential for achieving hermetic, durable connections, particularly in production environments where precision and repeatability are paramount.
A 25 kW Platinum generator was used for brazing the internal components of solenoid valves, configured to provide precise and consistent heating..
With the component already positioned inside the solenoid valve, it only requires the application of flux to proceed with the melting of the pre-applied brazing alloy. The process employed a closed inductor, designed to ensure uniform heat distribution. Temperature control was managed through a pyrometer, allowing for continuous monitoring and maintaining the optimal brazing temperature.
The brazing alloy melted in approximately 18 seconds, resulting in a strong, uniform connection. The adoption of induction brazing allowed for high repeatability—a critical factor……
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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