Induction Shrink Fitting Steel Pipe Assemblies
A client needed to heat steel pipe assemblies for a shrink fitting application. The end products are glass processing systems. THE LAB at Ambrell...
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ABOUT
A client contacted THE LAB at Ambrell because they needed to heat brass contacts to 800-1200 ºF (427-649 ºC) for an annealing application. THE LAB determined that an Ambrell EASYHEATTM 3.5 kW, 50-150 kHz induction heating system with a single position three-turn helical induction heating coil would be the right solution for the application. The frequency for the application was 360 kHz.
More annealing application notes
Initial tests were conducted to optimize the power delivered to the part. The assembly was placed inside the coil and power was turned on. The current remained constant during heating and the heat cycle time varied. The parts heated in 1.5 seconds initially and then the heat time changed to 2.1 seconds, with 0.1 second interval steps. The results from laboratory testing achieved the client’s objectives.
Using induction heating for this annealing application was beneficial for a number of reasons. Induction is a high efficiency heating method, especially when compared to the client's prior torch heating method. It is also a rapid, controllable and repeatable heating process that delivers an even distribution of heat. Induction is also a hands-free method of heating that isn't dependent on operator skill like a torch. Finally, the expertise of THE LAB with free induction heating application testing was important, as they were able to develop the right process for their requirements.
If you have an application that might benefit from induction heating, be sure to contact THE LAB at Ambrell. We offer remote lab service, in-person testing or you can simply send in your parts, we'll test them, send a lab report, and return them for inspection.
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