Demagnetization methods
Growing demands for magnetic neutrality in industrial manufacturing require highly efficient and precise demagnetization methods. Residual magnetism in workpieces not only leads to quality losses but can also significantly disrupt subsequent production processes. Choosing the right method is crucial for successful demagnetization.
VALLON offers innovative technologies based on decades of experience and continuous development. Our methods enable precise and reliable demagnetization – from efficient continuous demagnetization for high material throughput to powerful pulse demagnetization for complex and highest requirements. We always consider the specific material properties, geometries, and quality requirements of your workpieces.
VALLON Pulse demagnetization
The innovative VALLON pulse demagnetization works with electronically controlled, decaying alternating field:
- Generation of very high field strengths
- Short pulse cycle time controlled decay of the magnetic field
- Precise frequency and amplitude control
Versatile applications for demanding requirements:
From cycled manufacturing processes to complex workpiece geometries – our demagnetization systems prove particularly valuable where highest precision is required. Whether carbide, tool steel, or multi-layer stacked materials in unfavorable alignment. The systems reliably deliver optimal demagnetization results even in quality-critical applications with strictest requirements.
Magnetic hysteresis curve
The magnetic properties of a ferromagnetic material are characterized by the curve progression and each point in the hysteresis curve.
H magnetic field strength, B flux density, BR residual flux density after reaching the saturation field strength HS, -HC coercive field strength at which flux density B = 0 (demagnetized)
1 Origin point of the initial curve (First magnetization)
2 Initial curve: rising hysteresis curve from origin point during first magnetization
3 HS Saturation field strength (complete magnetization)
VALLON Continuous demagnetization
Continuous demagnetization uses the physical principle of distance-dependent magnetic field strength, i.e., field strength decreases with increasing distance from the magnetic field source:
- Continuous transport through the demagnetization zone (e.g., through the coil opening)
- Increasing distance to the demagnetization zone results in uniform decrease of field strength
- Optimal field line alignment when the long workpiece axis is parallel to transport direction
- Integration into existing production lines often possible
Efficient solutions for continuous processes:
In continuous manufacturing processes with high material throughput, our systems show their particular strength. Especially with elongated workpieces aligned parallel to the transport direction, they ensure reliable demagnetization. Whether tubes, bars, sheets, profiles, or wire – the systems enable efficient demagnetization with consistently high demagnetization performance.