Ultraflex Demonstrating Induction Brazing of Copper Plate to Copper Bundle

[May 8th, 2018] As part of their efforts to show how induction heating can efficiently replace traditional flame-based brazing, UltraFlex Power Technologies has recently demonstrated the brazing of a bundle of copper stripes to copper plate using induction.

The goal was to determine the braze time and set up an optimized coil design for this kind of brazing application. An extra test was done to determine the viable parameters of the application.

The tests were done using UltraFlex proprietary 5-15 kW Induction Heating equipment from the W series, featuring flexible, wide range load impedance matching by utilizing multiple transformer ratios and configurable tank capacitance. Due to lack of flame, no specific conditions were required to perform the tests. The copper stripes were held in place with a steel strap before being brazed to the plate.

Using power of 8.57 kW and temperature varying between 204° C (400° F) and 648° C (1200° F), the brazing process was accomplished within 10 minutes. At an increased power of 28.27 kW and constant temperature of 760°C (1400°F), the brazing was completed in less than half the time, in mere 4 minutes. At a slightly reduced power of 26 kW and varying temperature, it took 4 minutes and 42 seconds to braze the strips bundle to the plate.

The tests showed that a power supply of 50 kW was recommended for this application, to ensure an initial heat time in the 4 minute/5 minute heat cycle. UltraFlex engineers also concluded that if the process was started by heating the copper straps closest to the plate, the flow times for the higher positions would be decreased due to heat carrying over on the plate.

The tests accomplished proved this was another successful application of induction-based brazing for manufacturing purposes. The brazing achieved was strong and reliable, while at the same time being energy- and time-efficient. The tests were done under complete safety, without requiring specific conditions.

Find out more at:

https://ultraflexpower.com/

Contact us at:

+1.631.467.6814
uptnews@ultraflexpower.com

About UltraFlex Power Technologies:

UltraFlex Power Technologies (ultraflexpower.com) offers the most advanced and innovative digitally controlled induction heating technology in the industry. Its compact modular and flexible systems are suitable for a wide variety of induction heating, casting and melting applications.

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