Induction Preheating Hot Heading For Single Rod With IGBT Induction Heater
Objective Heat a waspaloy rod to 1500ºF (815.5ºC) for hot heading application
Material Waspaloy rod 0.5” (12.7mm)OD, 1.5” (38.1mm) length, ceramic liner
Temperature 1500 ºF (815.5ºC)
Frequency 75 kHz
Equipment • DW-HF-45KW induction heating system, equipped with a remote workhead containing two 1.32μF capacitors for a total of .66μF
• An induction heating coil designed and developed specifically for this application.
Process A seven turn helical coil is used to heat the rod. The rod is placed inside the coil and power is applied for two seconds providing enough heat to penetrate the inner core. An optical pyrometer is used for close loop temperature control and a ceramic liner is used so the rod does not touch the coil.
Results/Benefits Induction heating provides:
• Low pressure and minimal residual stress
• Better grain flow and microstructure
• Even distribution of heating
• Improved production rates with minimal defects
Induction Preheating Hot Heading For Single Rod With IGBT Induction Heater
Objective Heat a waspaloy rod to 1500ºF (815.5ºC) for hot heading application
Material Waspaloy rod 0.5” (12.7mm)OD, 1.5” (38.1mm) length, ceramic liner
Temperature 1500 ºF (815.5ºC)
Frequency 75 kHz
Equipment • DW-HF-45KW induction heating system, equipped with a remote workhead containing two 1.32μF capacitors for a total of .66μF
• An induction heating coil designed and developed specifically for this application.
Process A seven turn helical coil is used to heat the rod. The rod is placed inside the coil and power is applied for two seconds providing enough heat to penetrate the inner core. An optical pyrometer is used for close loop temperature control and a ceramic liner is used so the rod does not touch the coil.
Results/Benefits Induction heating provides:
• Low pressure and minimal residual stress
• Better grain flow and microstructure
• Even distribution of heating
• Improved production rates with minimal defects
Induction Heating Wires For Hot Heading With IGBT Induction Heating Units
Objective To heat multiple steel wires to 1350ºF (732ºC) for hot heading application
Material Steel wire 0.185” (4.4mm) OD
Temperature 1350 ºF (732ºC)
Frequency 141 kHz
Equipment • DW-UHF-6 kW induction heating system, equipped with a remote workhead containing one 0.66μF capacitor
• An induction heating coil designed and developed specifically for this application.
Process A two turn channel coil is used to heat 12 wires at a time to reach the required 130 parts per minute. The wires are placed 0.5” (12.7mm) on center. The top 0.3” (7.6mm) of the wires are
heated for 5 seconds to achieve the desired temperature.
Results/Benefits Induction heating provides:
• Hands-free heating that involves no operator skill for manufacturing
• Elimination of springback effect
• Extended die life
• Better grain flow and microstructure
• Even distribution of heating
Induction Heating Steel Part For Hot Heading With IGBT Induction Heater
Objective Heating steel parts to 1900ºF (1038ºC) for hot heading application
Material Steel parts with 7/16” (11.11mm) OD and ceramic piece
Temperature 1900 ºF (1038ºC)
Frequency 440 kHz
Equipment • DW-UHF-6kW induction heating system, equipped with a remote workhead containing one 0.66μF capacitor.
• An induction heating coil, designed and developed specifically for this application.
Process A four turn helical coil with ceramic insert is used to heat a 0.75” (19mm) section of the part to 1900ºF (1038ºC) for 7.5 seconds. A ceramic piece is so the part does not come in
contact with the coil.
Results/Benefits Induction heating provides:
• Hands-free heating that involves no operator skill for manufacturing
• Direct application of the heat on the work piece with precision and consistency
• Even distribution of heating
• Low pressure and minimal residual part stress
