Induction Brazing Brass Studs to Copper Pipes

Induction Brazing Brass Studs to Copper Pipes Objective: Induction brazing brass studs to copper pipes The Client: A manufacturer of coils for industrial heating applications. Equipment: DW-UHF-40KW Induction Brazing Systems – two modules. Materials: Brass stud ( size:  25mm diameter, 20 mm height ) Power: 30 kW The Process:  The main challenge during this induction brazing process … Read more

Induction Brazing Brass Faucet

Induction Brazing Brass Faucet

Objective Brazing two joints on a brass bathroom faucet assembly
Material Brass bathroom fittings 1” OD, brazing rings, flux
Temperature 1148 ºF (620 ºC)
Frequency 90 kHz
Equipment • DW-UHF-30 kW induction heating system, equipped with a remote workhead containing eight 1.0 μF capacitors for a total of 8.0 μF
• An induction heating coil designed and developed specifically for this application.
Process A two turn C shaped coil is used to braze the faucet assembly.
The braze rings are placed at the joint, the parts assembled and fluxed. The first braze joint is heated for 30 seconds and the braze ring flows. The assembly is rotated & the second joint is heated for 30 seconds to flow the braze ring. The two brazes are completed in 60 seconds.
Results/Benefits Induction heating provides:
• Faster, repeatable and consistent results
• Localized heat produces neat and clean joints
• Hands-free heating that involves no operator skill for manufacturing
• Even distribution of heating

Brazing Brass To Copper With Induction

Brazing Brass To Copper With Induction

Objective: To braze brass end-connectors to copper tubes used in aircraft assembly air lines Material brass end connectors, copper tubes of different diameters

Temperature 1400 ºF 750°C

Frequency 350 kHz

Equipment DW-UHF-4.5KW induction heating system, including a three turn helical induction coil using two 0.33μF capacitors (total 0.66μF)

Process For smaller diameter parts, flux is applied to the entire part and the copper tube to brass joint is assembled using brazing preforms (allowing for the same amount of braze in each joint). The assembly is placed in the coil and heated for 20-30 seconds reaching a temperature of 1400°F. For larger copper tube assemblies, the same process is used, but the braze alloy is stick-fed to the joint to prevent the alloy from flowing out of the joint. A foot switch control is recommended to enable better control of the process.


Economy: Power is consumed during the heating only

Consistency: the results of braze joints are repeatable and uniform

Brazing Brass Fittings With Induction

Brazing Brass Fittings With Induction Objective :To heat brass tubing assemblies to 750°C for a brazing application. The tubing diameter varies from 3 to 8 inches (76.2 to 203.2 mm) Material: Brass tubing Brass flange Braze rings Braze flux Temperature :1382°F (750°C) Frequency 200 kHz Equipment DW-UHF-20KW, 150-500 kHz induction heating power supply, equipped with … Read more

Brazing Copper Tube to Brass Fitting With Induction

Brazing Copper Tube to Brass Fitting With Induction 

Objective: To use induction heating to braze a copper tube to a brass fitting using a preform braze wire. Processing is to occur under an atmosphere of Nitrogen and 4% Hydrogen gas. The braze preforms melt at 1190°F, but the parts need to be kept below 1300°F. The parts need to be processed at a rate of 175 to 200 per hour which translates into 18 seconds of heating time per part.

Material Copper Tubing Measuring 0.5″ OD and 2″ Long, Brass fitting, Braze Preform, No Flux.

Temperature Above 1190°F but not to exceed 1300°F

Frequency :300 kHz

Equipment: DW-UHF-10KW output solid state induction heating power supply with three (3) busses, eight (8) capacitors totaling 0.66 μF, and a unique four turn helical coil. Process The DW-UHF-10KW output solid state power supply along with a unique four turn helical coil were used to achieve the following results.

Results • The requested atmosphere was provided under a bell jar by supplying 95% Nitrogen/5%Hydrogen at a rate of 25-30 cfh. • A heating cycle of only 10 seconds was necessary to attain sufficient braze flow which surpasses the required limit of 18 seconds.