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
