Induction Preheating Rivets Of Carbide Steel
Induction Preheating Rivets of Carbide Steel With RF Induction Forming Heating Units
Objective Preheat low carbon steel rivets and handrail bars for reforming for construction
Material Low carbon steel rivets 7/16” (11.1mm) dia x 1.5” (38mm) & 1.9” (47mm) long, low carbon bar 1.25” (32mm) dia x 3” (75mm) heat zone
Temperature 1922 ºF (1050 ºC)
Frequency 48 kHz for the rivets 55 kHz for the bars
Equipment · DW-HF-25 kW induction heating system, equipped with a remote workhead containing two 1.5F capacitors for a total of 0.75F
· An induction heating coil designed and developed specifically for this application.
Process A Three turn encapsulated helical coil is used for the rivets and a four turn encapsulated helical coil is used for preheating the handrail bars. The rivets are heated to the 1922 ºF (1050 ºC) in
22-25 seconds and the bars are heated to the 1922 ºF (1050 ºC) in 4 mins 43 seconds.
Results/Benefits Induction heating provides:
· Controllable heat pattern
· Ease of on site location use
· Safe, no open flames
· Even distribution of heating