Note: Brazing a small gas delivery assembly
Objective:
Brazing stainless steel housings to stainless steel tube for gas assembly used in the manufacturing of needles
End Product:
Needle manufacture
Equipment:
Ambrell 1.2 kW induction heating system, equipped with a remote workhead containing one 1.2μF capacitor. An induction heating coil designed and developed specifically for this application.
Materials:
2 stainless steel housings .25 in (6.35mm) dia, .675 (17.1mm) & .54 in (13.7mm) in length stainless steel tube .031 in (.78mm) dia braze preforms
Temperature:
1450 °F (787 °C)
Frequency:
223 kHz
Testing:
A two turn pancake coil and hydrogen atmosphere is used for this brazing application. Braze preforms are placed at the joint and the assembly is placed in the hydrogen atmosphere. Each joint is brazed individually for 60 seconds. This customer came to Ameritherm through a lead from our website. This is a new part for the customer and they are developing the manufacturing process for it. The customer is interested in using induction heat for their process because they are looking for finished parts which are clean and not contaminated by any flux material. By using induction to braze the part and by doing the braze under a hydrogen atmosphere, the customer can produce brazed parts with no oxidation.
Benefits:
Hands-free heating that involves no operator skill for manufacturing
Repeatable, consistent heat
Clean parts
Even distribution of heating
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