When objects become magnetized, they will attract nearby ferromagnetic materials. Unfortunately, this can lead to metal filings and other metal debris clinging to magnetic tools and equipment. A simple solution, however, is to use a surface-type demagnetizer. It can neutralize residual magnetism so that tools and equipment don’t unintentionally attract ferromagnetic materials.
What Is a Surface-Type Demagnetizer
A surface-type demagnetizer is an electronic device that removes the magnetic fields from tools and objects. Grinding, machining and other manufacturing processes can introduce magnetism. It will align the magnetic domains within the tool or object, thereby making it a temporary or permanent magnet. Surface-type demagnetizers are designed to remove these unwanted magnetic fields.
Benefits of surface-type demagnetizers include the following:
- Extends the life of tools by preventing uneven wear attributed to magnetism.
- Improves precision by eliminating magnetic-related distortion.
- Promotes cleaner surfaces by preventing metal dust and chips from sticking.
How Surface-Type Demagnetizers Work
Surface-type demagnetizers work by randomizing the magnetic domains of the tool or object with which they are used. When the magnetic domains become aligned, the tool or object will produce a magnetic field. By randomizing the magnetic domains, the tool or object will no longer produce a magnetic field.
Within a surface-type demagnetizer is an electromagnetic coil that produces an alternating magnetic field. This alternating magnetic field constantly reverses its polarity. As a result, when a magnetic tool or object is exposed to a surface-type demagnetizer, its magnetic domains will become randomized. A process known as AC demagnetization, it’s a fast and effective way to demagnetize tools and objects.
Surface-Type vs Tunnel-Type Demagnetizers
While they are all designed to remove residual magnetism, there are different types of demagnetizers, including surface-type and tunnel-type.
Surface-type demagnetizers are characterized by a flat base. The surface of the tool or object is placed directly against this surface. Tunnel-type demagnetizers, in comparison, are characterized by a tunnel-like opening. The tool or object is placed through this opening. Tunnel-type demagnetizers are typically better suited for high-volume demagnetizing applications, whereas surface-type demagnetizers feature a simpler design that makes them better suited for manual.
In Conclusion
Surface-type demagnetizers play a vital role in maintaining precision, cleanliness and efficiency in industrial environments. By removing unwanted magnetic fields, they prevent contamination, reduce wear on tools and ensure consistent performance across manufacturing processes. Their simple yet effective design makes them an ideal choice for workshops and production lines.