Note: Brazing temperature sensor assemblies
Objective:
Brazing various diameter temperature sensor assemblies
End Product:
Temperature sensors
Equipment:
Ambrell 2.4 kW induction heating system, equipped with a remote workhead containing two 0.66Ä μF capacitors for a total of 0.75 μF. Induction heating coil designed and developed specifically for this application.
Materials:
0.188 in (4.8mm) -0.25 in (6.4mm) diameter assemblies and BAg 7 0.031 in (0.8mm) OD brass wire
Temperature:
1350 °F (732 °C)
Frequency:
180 kHz
Testing:
A five-turn two-position helical coil is used for this brazing application. Each coil acts individually and the coils are not designed to heat simultaneously. The diameter of the assembly determines which coil diameter is used. Each part is heated within a 30 second cycle time. Each part is heated with a different cycle time and power setting to create the brazed joint. This customer is currently using an acetylene torch for this application. The customer would like to use induction to produce consistent results and higher quality brazed joints.
Benefits:
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Consistent and repeatable results
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High quality brazed joints
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Hands-free heating that involves no operator skill for manufacturing
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Reduced energy consumption
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Even distribution of heating
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