A test set up by UltraFlex shows the efficiency of using induction heating for camshaft hardening on the production line.

[Feb 14th, 2020] The use of induction heating for hardening of parts for the automotive industry has recently been demonstrated by UltraFlex. The company – a leading manufacturer of induction heaters – proved via a test application the energy and cost-efficiency of induction heating for yet another manufacturing scenario.

In this application, a variety of steel samples had to be hardened by heating their surface to a target temperature of 800°C, followed by cooling them out. The goal of this hardening process was to increase the wear resistance of the workpiece surface, while keeping the core of the sample soft to preserve its tensile strength and torsion resistance. It was essential that the heating and cooling rates would be strictly observed in order to obtain particular material features.

UltraFlex W-15 induction heating unit had been considered most appropriate for this heating scenario. The induction heaters from UltraFlex UltraHeat W Series are advanced, cost-effective 5-15 kW Induction Heating Systems utilizing the latest switching power supply technology. They feature an adaptive digital phase control providing very efficient operation in a wide frequency range.

At power output of 13.37 kW and using a helical induction heating coil, it took a mere 5 seconds to reach the target heating temperature and accomplish the induction heating process. The core of the camshaft was successfully prevented from heating during the hardening process to preserve its softness.

When used on the production line, the process of induction-based camshaft hardening allows for great controllability and repeatability. As a result, induction heating is now the preferred method for hardening camshafts. In addition, the induction-based hardening is a flexible process, allowing to precisely adjust the heating parameters.

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

Check out a photo from this test setup:

camshaft induction hardening ultraflex
Camshaft Induction Hardening