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 wireย assembly to 3600 F for soldering within three (3) to six (6) seconds. Currentlyย production is accomplished by using a soldering iron and stick feeding rosinย cored solder. This process leaves unwanted solder on the side of the slip ringย where the soldering iron makes contact. The customer would like to see anย increase in joint quality without sacrificing time.
Material: 303 Brass Slip Rings of 1 3/4″, 3″ and 6″ diameters.ย Sheathed Copper Wire Assembly.
Resin Core Solder, 37% Pb, 63% Sn.
Temperature: 3750F
Application: Through laboratory testing, the DW-UHF-20kW output solid stateย induction power supply along with a unique four (4) turn “ear muff” type coilย 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” styleย coil.
Equipment: DW-UHF-20kW output solid state induction power supply includingย one (1) remote heat station containing one (1) 1.0 ฮผFcapacitor, a 4-20mAย input for fast ramp simulation, and a unique four (4) turn “ear muff” style coil.
Frequency: 265 kHz
