induction brazing stainless steel tubing process

induction heating theory

Induction Brazing stainless steel tubing and stainless steel fittings Technology Objective Induction Brazing stainless steel tubing and stainless steel fittings Equipment DW-UHF-20kw induction brazing machine Materials 1.75″ (44.45mm) Hexagon fitting Power: 10.52 kW Temperature: 1300°F (704°C) Time: 30 seconds Results and Conclusions: Induction heating pinpoints the heat to the desired area of the part Improved process control for … Read more

High Frequency Brazing Stainless Steel Fittings

High Frequency Brazing Stainless Steel Fittings Objective High Frequency Brazing stainless steel fittings to corogated (SS) hoses. The hoses are with sizes ID 1.575in (40mm) and ID 2.99in (76 mm).  The customer has never used induction heating before and is not familiar with the induction process. The goal of this test is to prove the strength of … Read more

Induction Soldering Stainless Steel To Wire

Induction Soldering Stainless Steel To Wire With IGBT High Frequency Heating Units

Objective Heat Stainless steel connector for soldering application in automotive wire harness manufacturing
Material Stainless steel connector 1.57” (40mm) long, 0.6” (15mm) OD & 0.4” (10mm) thick. Lead free solder
Temperature 392 ºF (200 ºC)
Frequency 352 kHz
Equipment • DW-UHF-6kW induction heating system, equipped with a remote workhead containing one 1 μF capacitor.
• An induction heating coil designed and developed specifically for this application.
Process A two turn channel coil is used for soldering the connector to the wire harness. The stainless steel connector and wire harness are placed in the coil for 20 seconds for the solder to
fill just the top of the connector.
Results/Benefits Induction heating provides:
• By precisely heating the metal, the plastic shroud is not directly heated
• Reduced production cost
• Faster process time, reduced production cost
• Hands-free heating that involves no operator skill for manufacturing
• Even distribution of heating

induction soldering coil





soldering stainless steel to wires

Induction Soldering Stainless Steel Tubing

Induction Soldering Stainless Steel Tubing with IGBT Soldering Heating Units

Objective Heat a.125” (3.175mm) diameter stainless steel tube to a 1” diameter cylinder 1” (25.4mm) tall for a soldering application
Material Stainless steel cylinder and tube
Temperature indicating paint
Lead free solder preform rings
Temperature 300-400 ºF (150-205 ºC)
Frequency 235 kHz
Equipment DW-UHF-4.5 kW, 150-400 kHz induction power supply, equipped with a remote heat station containing two 0.66 μF capacitors (total 1.32 μF).
A three-turn pancake coil induction heating coil designed and developed specifically for this application.
Process Initial tests without solder ensured that the metal reaches the required temperature and the heating pattern on the part.Solder preform rings are placed onto the tube at the joint. The part is placed inside the induction-heating coil heated until the solder melts.
Results/Benefits Programmable and adjustable heating ramp rates achieve the desired heat profile. Too fast a heat profile does not conduct the heat through the joint and too slow a heat cycle vaporizes
or dries the flux causing poor solder flow.

soldering stainless steel tubing