What Is Induction Shrink Fitting?
Induction shrink fitting is a process in which a precise electromagnetic field is used to heat and thermally expand an electrically conductive material prior to assembly, resulting in an interference fit joint upon return to ambient temperature.
What Benefits Does Induction shrink-fitting Offer?
Meets tight production tolerances with precise localized heat to small areas creating pinpoint accuracy
Increases production rates with faster heating cycles
Reduces defect rates with repeatable, reliable heat
Eliminates variability from operator-to-operator, shift-to-shift
Maintains metallurgical characteristics of the individual metals
A specially designed multiple turn internal helical coil was used to provide the heat to the various steel parts.
Using induction for shrink-fitting magnetic steel pistons onto a chrome shaft; the client was using an unreliable handheld induction system and wanted a higher quality induction shrink-fitting solution.
Shrink-fitting hammer bits with induction for the insertion of carbide buttons; the end product is a drilling tool for the oil and gas industry.
Induction shrink-fitting with EASYHEAT takes 45 minutes to heat the sample to the required temperature. The current oven process takes over two hours.
A multi-turn helical coil delivers uniform heat to the entire range of the bearing sizes in the transverse mode.
With an EASYHEAT 2 kW induction shrink-fitting system, the aluminum tube heated to the required temperature within 30 seconds. Shrink fitting then took place
Induction shrink-fitting is fast, presents significant energy savings over an electric oven, requires a more modest footprint than an oven and can be easily integrated into an automated process
The client currently uses an electric oven and the heating time is two hours, so at 60 seconds, the time savings with induction shrink-fitting is very significant
The customer was using a torch, which can lead to inconsistent part quality. Induction's precise heating means the client can count on consistent results in their process
The customer was using a cold press, but it was creating part defects. This was resolved with induction heating: the process took just two minutes compared to 40 minutes and they were able to achieve their targeted production rate.
About Induction Heating
Induction heating is a fast, efficient, precise and repeatable non-contact method for heating metals or other electrically-conductive materials. The material may be a metal such as brass, aluminum, copper or steel or it can be a semiconductor such as silicon carbide, carbon or graphite. To heat non-conductive materials such as plastics or glass, induction is used to heat an electrically-conductive susceptor, typically graphite, which then transfers the heat to the non-conducting material.
Read our 4-page brochure; learn more about how the science of induction technology can solve your precision heating problems.
Induction Heating Work Coils
The work coil is the component in the induction heating system that defines how effective and how efficiently your work piece is heated.
Read our informative brochure explaining the fundamentals of induction coils and their design.