Fields of application

Residual magnetism is a common problem in machining. During processes like milling, turning, and drilling, chips can adhere to magnetized workpieces and tools, negatively affecting surface quality and increasing tool wear. VALLON demagnetization systems effectively solve this problem. They prevent magnetic adhesion of chips, improve surface quality, and increase process reliability.

In grinding and lapping, the magnetic adhesion of grinding dust and abrasion particles presents a particular challenge. Through targeted demagnetization before and after the grinding process, VALLON optimizes surface quality, reduces post-processing times, and increases product quality.

Additionally, subsequent cleaning processes are more efficient when the machined workpieces are already demagnetized.

Forming technology also benefits significantly from VALLON's demagnetization solutions. In punching and pressing, demagnetization of tools and workpiece materials prevents the adhesion of punching waste and facilitates its removal. This leads to more efficient processes, improved product quality, and ensures tool life.

In deep drawing, targeted demagnetization of sheet metal and tools optimizes material flow and reduces surface defects caused by adhering metallic particles. In powder metallurgy, demagnetization of pressing tools ensures better flow behavior of metal powders, resulting in more homogeneous density distribution in the cavity, longer tool life, and stable quality of pressed parts.

In joining technology, demagnetization plays a key role in achieving high-quality results. In welding, whether MIG/MAG, TIG, or electron beam welding, demagnetization of workpieces prevents arc deflection in the joining gap. The result is uniform weld seams and less rework.

In DC welding or capacitor discharge welding, workpieces become more or less strongly magnetized by the direct current flowing through them. This residual magnetism can interfere with subsequent processes or the finished product. The solution: Integrated downstream demagnetization ensures magnetic neutrality of your products.

High-quality screws must have clean threads without residual chips. The feeding of demagnetized semi-finished products into machines and demagnetization of screws before final cleaning guarantees the desired product quality.

In surface technology, demagnetization is essential for high-quality results. Before PVD/CVD coatings of cutting tools, demagnetization of uncoated tools leads to more uniform layer thicknesses. In galvanic processes, demagnetization leads to more homogeneous coatings and optimized surface quality while minimizing particle inclusions.

As preparation for painting and powder coating processes, demagnetization of steel workpieces facilitates thorough cleaning of surfaces from metallic particles and thereby prevents particle inclusions, significantly improving surface quality and corrosion resistance.

Technical cleanliness of components is crucial in many industries, particularly in the automotive sector. VALLON's demagnetization solutions play a key role here. During the manufacture of metal parts from steel, finest metallic contaminants such as particles and flakes are produced. Critical surfaces with increased residual magnetism attract these ferromagnetic particles, drastically reducing cleaning efficiency.

Possible consequences: For example, when assembling rolling elements in ball or roller bearings, residual magnetism significantly increases the risk of metallic particle contamination during assembly. In the automotive industry, where strict limits between 2-5 A/cm are often specified for engine and transmission parts as well as fuel injection components, precise demagnetization is essential to prevent premature wear or even component failure.

Using VALLON demagnetization systems before cleaning processes effectively prevents ferromagnetic particles from adhering due to residual magnetism. This enables more effective cleaning and ensures that even the strictest cleanliness standards can be met. Thus, our technology makes a significant contribution to improving product quality, functionality, and component longevity in demanding applications.

Demagnetization plays an important role in industrial cleaning processes for steel components. In industrial parts cleaning, demagnetization before and after the cleaning process prevents particle adhesion and increases technical cleanliness. In ultrasonic cleaning, demagnetization optimizes cavitation effects and leads to more uniform cleaning results. Aqueous spray and immersion processes develop their effectiveness and particles detach better from the surface. In plasma cleaning, demagnetization ensures more homogeneous plasma distribution and improved surface activation.

Thus, our technology makes a significant contribution to ensuring cleaning performance and optimizing common cleaning procedures.

In assembly and handling, demagnetization optimizes automated processes. In automated assembly processes, the integration of demagnetization units prevents disruptions during the separation of small parts. In robot-assisted handling, demagnetization of grippers and workpieces improves positioning accuracy.

In conveyor technology, e.g., in feed rails, vibratory conveyors, or spiral conveyors, strategically placed demagnetization units improve material flow, reduce congestion, and avoid problems at transfer stations.

In non-destructive testing and quality assurance, demagnetization is essential for reliable test results. In eddy current crack testing and magnetic inductive testing procedures, demagnetization of test specimens eliminates magnetic interference signals, reduces pseudo-defects, and increases testing and measurement accuracy. After magnetic particle crack testing, thorough demagnetization neutralizes the previously required magnetization while simultaneously improving the removal of test particle residues and thus component cleanliness.

In dimensional metrology, demagnetizing measuring objects and fixtures reduces measurement deviations and increases measurement accuracy.