Induction Brazing

What is Induction Brazing?

Induction Brazing of parts is used for a wide range of products from electrical contacts to much larger components including hydraulic tubes, machine tools, dental drills and masonry drills.

Frequencies used for induction brazing are generally from 50kHz up to 200kHz - in general terms, the lower the frequency, the deeper the current flow. Lower frequencies can be used but below 10kHz care has to be taken as the magnetic field can cause vibration in the parts leading to poor joints.

Power units are available from 3kW up to 500kW but generally most brazing applications use 12kW to 30kW units from our Ultratec range.

Induction Brazing

In high volume production environments it is common to combine the induction heater with a component handling system of some kind. Dependant on the level of throughput and component geometry these can be either manual, fully automated or in some cases a combination. These systems include inline conveyor system, rotary tables, double shuttles, pick and place systems and many other "tailor made" solutions. Inductelec is unique in being able to offer the complete turnkey solution from concept and design to manufacture of all system elements under one roof.

The main advantages of induction heating for brazing are:-

  • Repeatability
  • Lower distortion
  • Reduced discolouration or oxidisation
  • Rapid heat rates
  • Accurately focused heat affected zone
  • Extremely well controlled heat input and temperature
  • No pressurised gas systems and associated H&S considerations
  • Better working conditions
  • Improved operator safety
  • Highly efficient energy conversion

Many of the advantages above are due to the ability to accurately control all the major parameters i.e. time, power and temperature, this can be achieved either internally or from a peripheral system via our CAN-bus interface.

Most common metals and alloys which can be brazed by other methods can be joined using induction. Dissimilar metals can be joined using the technique, however, special consideration needs to be given in situations where a magnetic metal is joined to a non-magnetic material but normally these differences can be overcome by coil/inductor design.

In applications where the brazing operation has to be carried out under vacuum or atmosphere, induction brazing often offers the only suitable method.

Because most systems are automatic/semi-automatic, operator skill is reduced in comparison to torch brazing or other conventional methods. By Utilising our Ultratec power unit and our purpose designed safe-braze work-head coil voltages are reduced and operator safety is assured.

For precision applications a range of temperature control options are available normally utilising a non contact type infra red pyrometer. These systems easily interface to the Ultratec via the dedicated CAN-bus interface.

Please browse our website for more information about Induction Brazing then contact us on 0114 272 3369 to speak to a member of our team or e-mail us on info@inductelec.co.uk.