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Flattening and Bending Steel Tubes

Objective: To heat steel tube ends for a flattening/bending applications; the end customer uses products in the manufacturing industry.

Frequency: 191 kHz

• Ambrell EASYHEAT 8.3 kW, 150 - 400 kHz induction heating system equipped with a remote workhead;
• A single position, multiple-turn helical coil designed specifically for this application.

Material: Steel tubes

Temperature: 1600 ºF (871 ºC)

Process: First, temperature indicating paint was applied to the part, which dissolves when the part reaches the target temperature. It took less than 20 seconds to heat the provided smaller tube sample to 1600 °F (871 °C) and it took 40 seconds to heat the larger sample tube to temperature. The client was seeing heating times of at least two minutes with an oven, so this is a significant improvement.
Benefits:

• Speed: Induction heated the tubes to forging temperature much more rapidly than an oven;
• Precision and repeatability: Induction can target the precise portion of the part that requires heating every time, presenting another advantage over an oven;
• Quality and experience: The client was looking at an induction competitor too, but went with Ambrell due to its extensive application experience and reputation for manufacturing quality systems.