Induction Heating Valve Head | Manufacturer of induction heating machine ,ultrasonic welding machine

Induction Heating Valve Head

Induction Heating Valve Head For Stress Testing With Induction Heating Equipment

Objective To heat the face of an engine valve head to 900°F and maintain the temperature for an extended time, high temperature stress test.
Material Engine valve head (two sizes), temperature sensing paint
Temperature 900 °F
Frequency200 kHz for large part; 271 kHz for smaller part
Equipment DW-UHF-10KW Induction Heating power supply, remote heat station with one 0.66 mF capacitor, a specially designed, multiturn induction coil and an optical pyrometer.
Process A specially designed multi-turn pancake coil was used to provide uniform heat to the part. To provide optimum coupling, the face of the valve head was placed approximately 3/8” away from the coil. RF induction power was applied for 4 minutes to heat the larger valve to 900°F; the smaller valve head required 2 minutes to reach the same temperature. For closed-loop temperature control, the optical pyrometer was then used to maintain the temperature at 900°F.
Results Uniform and repeatable results were obtained with the
DAWEI power supply and induction coil at 900°F. Depending on the part size, the correct temperature was reached in 2 to 4 minutes.