Induction Brazing an Aluminum Tube Assembly

Objective

A company had been using a torch for the brazing of automotive parts, but they contacted THE LAB at Ambrell because they wanted to see if induction might be a better fit for their process. Speed, consistency and efficiency were reasons they decided to assess induction heating.

Evaluation

THE LAB determined that an Ambrell EASYHEAT 10 kW, 150-400 kHz induction heating power supply with a custom-designed single position multiple-turn pancake coil would work well for this application. 

Initial tests were conducted to optimize power delivery to the assembly. Temperature indicating paint was used to determine the heating time for the process. One braze ring and aluminum brazing flux was used for testing. It was observed that it took 45 seconds to heat the sample to temperature and melt the braze alloy. This result achieved the client’s speed and quality objectives.

Solution

As mentioned, speed and consistency were two reasons the client was assessing induction, and induction delivered on both fronts. With a torch, operator skill is critical, making consistency an issue at times. With induction they will see the same result time after time. Induction also delivers less heat into the work environment and there is no open flame, offering safety benefits. Finally, the expertise of THE LAB allowed the client to have peace-of-mind knowing their application would work prior to investing in induction equipment. 

If you have an application you'd like tested by THE LAB at Ambrell, contact us today to take advantage of free induction heating application testing. We'll send your parts back for inspection, along with passing along a video showing you the heating process. You can even visit us to view the testing in-person or observe it live with our Remote Lab Service.