Heating a Copper Assembly for Soldering

Objective

To heat a glass feed-through inside a copper block for a soldering application, one side at a time. This was a new application/process for the client.

End Product

copper block

Equipment

Ambrell EASYHEATTM 4.2 kW, 150-400 kHz solid state induction heating power supply with a workhead and single position multiple-turn split helical coil specifically designed for this soldering application

Materials

copper

Temperature

361 ºF (183 ºC)

Frequency

294 kHz

Testing

Initial tests were conducted to optimize the power delivered to the part. Temperature indicating paint was then applied to the part, which dissolves when the part reaches target temperature. It was observed that the part reached 361 ºF (183 ºC) within 40 seconds.

The speed and end product met the client’s objectives

Benefits

• Speed: Heating met the client’s time objectives for the soldering application.

• Precise, repeatable heating: Induction is a highly repeatable process so the customer can expect the same result every time and isn’t dependent on operator skill.

• Footprint: The EASYHEAT requires little floor space, making it an easy addition to this client’s new process

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