Induction Soldering Brass Rings With High Frequency IGBT Induction Heater
Objective: To heat 1 3/4″, 3″ and 6″ diameter brass slip rings and a sheathed copper wireĀ assembly to 3600 F for soldering within three (3) to six (6) seconds. CurrentlyĀ production is accomplished by using a soldering iron and stick feeding rosinĀ cored solder. This process leaves unwanted solder on the side of the slip ringĀ where the soldering iron makes contact. The customer would like to see anĀ increase in joint quality without sacrificing time.
Material: 303 Brass Slip Rings of 1 3/4″, 3″ and 6″ diameters.Ā Sheathed Copper Wire Assembly.
Resin Core Solder, 37% Pb, 63% Sn.
Temperature: 3750F
Application: Through laboratory testing, the DW-UHF-20kW output solid stateĀ induction power supply along with a unique four (4) turn “ear muff” type coilĀ produced the following results:
Times to reach 3750 F are as listed below:
– 1 3/4″ in 3 seconds
– 3″ in 3-4 seconds
– 6″ in 5 seconds
Adequate solder flow was observed producing a clean joint.
Solder preforms are recommended to speed up production.
Side loading was facilitated by the unique four (4) turn “ear muff” styleĀ coil.
Equipment: DW-UHF-20kW output solid state induction power supply includingĀ one (1) remote heat station containing one (1) 1.0 Ī¼Fcapacitor, a 4-20mAĀ input for fast ramp simulation, and a unique four (4) turn “ear muff” style coil.
Frequency: 265 kHz
