Note: Preheating a steel automotive transaxle (welding)
Objective:
To preheat a 3.6 in (91 mm) outside diameter steel axle with three weld lines to 662 °F (350 °C) with each weld line being heated to temperature within five seconds
End Product:
Transaxle
Equipment:
To preheat a 3.6 in (91 mm) outside diameter steel axle with three weld lines to 662 ĂĹF (350 ĂĹC) with each weld line being heated to temperature within five seconds
Materials:
Customer-supplied 3.6 in (91 mm) O.D. steel axle
Temperature:
662 °F (350 °C)
Frequency:
121 kHz
Testing:
The steel axel was painted with temperature indicating paint and a thermocouple was attached to the part. The induction heating coil was placed inside the steel axel and the power supply was turned on. This approach enabled the weld line to be heated to 662 °F (350 °C) within five seconds as desired by the client. The power supply is capable of being programmed to turn off after the desired heating time-five seconds in this case. Then, the coil can be moved to the second weld line, and the third weld line.
Benefits:
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Process: With the coil being inside the axle, it does not get in the way, and it can then easily be moved to the next weld line
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Speed: Induction and the proposed process enables the weld lines to be heated to temperature within the targeted time
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Free lab testing: This is a new project for the client, and AmbrellâÂÂs Lab Service Request testing enabled the client to test their application and an innovative approach was designed

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