Induction heating is widely used for induction brazing applications.  The reason for its popularity is heat can be applied to the surface and the filler material very precisely using Induction Brazing. By having the capability of applying heat to a precise area the overall processing time is reduced significantly from what is experienced with a furnace or direct flame heating.  Oxidation along with structural or chemical changes in the treated parts is reduced to a minimum.  Substantial savings in energy costs are realized for medium and high production rates. 

Power requirements are generally low, e.g.: from 10 to 100 kW.  Our portable transistorized power supplies are ideal for many induction brazing applications.  Various types of inductors can be used such as, external, internal, multi-turn, pancake, hairpin, proximity inductors, etc.

INDUCTION HEATING EQUIPMENT FOR BONDING

Induction Bonding has become more widespread as a preferred method of assembly especially in the automotive industry. The method involves accelerating the polymerization of the adhesive by heating the metal parts to be bonded by induction heating equipment. The temperatures required are generally low in the 150 to 300°C. This process is now extensively used to manufacture automotive body parts such as doors, hoods and rear deck lids. Metal to polyester bonds can also be treated by induction heating equipment.

There are essentially two techniques presently being used in industry for applying this technology:

1. Heating of the entire perimeter during induction bonding which in this case involves an inductor which has the same contour as the part being bonded.

2. Heating of specific segments or spot heating in which case the polymerization zones are heated using small flat magnetic circuit inductors.

With respect to spot bonding, the advantages of this process are as follows:

■ The part bonded is not marked therefore
there are no after painting defects and
polishing is not required.
■ Less power consumption with induction
heating equipment.
■ No corrosion problems associated with
welding points.
■ Adhesive may be combined with sealing
strip.

INDUCTION HEATING EQUIPMENT FOR INDUCTION WELDING

 

One of the main induction heating application for welding is for producing tubes and other closed profiles made of steel, aluminum or copper.  Some advantages of the induction heating equipment used for the Induction  Welding process are high production rates, quality, regularity of the weld, welding strips without first picking, and lower power consumption.