Corte de Contorno de Materiais Magnéticos com Serra de Fio Contínuo

A Ensoll testou uma amostra de material magnético de um cliente europeu com uma serra de fio de diamante contínuo personalizada. The goal was to cut an irregular contour while keeping edge chipping, rugosidade superficial, and contour deviation under control. The process used an endless diamond wire saw machine paired with a fully coated diamond wire loop.

Contour work on rare-earth blocks follows the same principles as como cortar ímanes de neodímio, with lower feed rates on tight radii.

Test Result at a Glance

• Material: magnetic material supplied by a European customer
• Tamanho da peça: 80 x 50 x 50 milímetro
• Cutting target: irregular contour machining
• Cooling medium: cutting oil
• Malha de arame: 0.5 mm fully coated loop, 2305 mm length
• Linear wire speed: 29 EM
• Tensão do fio: 120 Terminais de PCB retos de microinterruptor miniatura com êmbolo de pino
• Wire bowing time: 200 s

1. Sample and Cutting Objective

The customer needed an irregular-shape cutting result on a magnetic material sample with stable dimensional consistency and low edge damage. Materiais magnéticos can be brittle, locally sensitive to stress concentration, and prone to contour-related chipping. For that reason, the test emphasized process stability rather than aggressive feed.

Ensoll used an endless diamond wire process because it offers continuous one-direction cutting, narrow kerf loss, and gentler load control than many conventional cutting methods. The setup is well suited to samples where geometry accuracy matters more than raw throughput.

2. Equipment and Process Setup

The machine platform was a customized vertical endless diamond wire cutting system. The sample was clamped vertically to help stabilize force distribution across the cut path, and cutting oil was applied to support cooling, lubrication, and chip evacuation.

The cutting interface was monitored in real time so the operator could confirm the motion state and parameter values during the cut.

3. Resultados de corte

The contour was checked at several feature positions. For this test, the outer arc width, bottom width, H1 height, and H2 height were recorded. The data showed that the sample remained stable overall, with the H2 direction showing the largest variation and therefore the clearest opportunity for further tuning if a tighter drawing tolerance is required.

The measured feature deviations were small enough to confirm that the contour was formed consistently. Ao mesmo tempo, the unequal deviation directions tell us that this kind of irregular shape should be tuned by feature zone rather than by one blanket parameter for the whole cut.

4. Surface Roughness Results

Surface roughness was measured at representative positions across the sample. The flat regions were slightly smoother than the curved transition area, which is a common pattern in irregular cutting.

Result: the sample stayed in a narrow roughness band across the measured areas. The arc zone was slightly rougher than the straight segments, so it should be watched closely if the next sample needs a lower Ra in the curved section.

5. Edge-Chipping Results

Edge chipping was measured along the contour after cutting. The bevel edges showed the largest defects, while the arc region stayed more stable.

Result: the maximum chipping stayed low across the contour, and the largest defect was still only 2.8 micrómetros. That makes the process a practical reference for customers who need a clean irregular cut on magnetic materials before secondary finishing.

6. Engineering Conclusion

This sample test shows that an endless diamond wire process can cut an irregular magnetic-material contour with stable force distribution, baixa rugosidade, and limited edge damage. The result depended on a matching set of process choices: vertical cutting, cutting oil, 120 tensão N, 29 velocidade do fio m/s, and careful path control.

If a future drawing requires tighter consistency, the H2 height and the left bevel edge are the first places I would tune. For the current sample, no entanto, the overall contour quality is strong enough to serve as a practical process reference.

Related Reading

See also our magnetic material cutting guide e o diamond wire saw machine category for more application context.

Citation permission: If you find this article helpful, Ensoll authorizes you to quote or reference it, provided that you include a link to this page as the original source.

Perguntas Frequentes

How do you cut irregular shapes in brittle magnetic materials?

A CNC diamond wire loop saw steers a thin diamond-coated wire along the programmed contour. Because it removes material by low-force micro-grinding instead of shearing, it avoids the edge chipping and stress cracks that rigid blades cause on brittle magnetic materials.

What surface roughness can diamond wire loop cutting achieve on magnetic materials?

In this sample test the average Ra stayed between 0.53 e 0.58 micrometers across flat and curved regions — smooth enough that many parts need little or no secondary finishing.

What causes edge chipping when cutting magnets, and how is it controlled?

Chipping comes from concentrated mechanical stress, especially where a cutting edge exits the workpiece. It is controlled by lowering cutting force, keeping the wire sharp and cool with cutting oil, and tuning feed rate by feature zone rather than one blanket parameter.

Which parameters matter most for contour accuracy?

Tensão do fio, wire speed and feed control matter most. This test used 120 N tension and 29 velocidade do fio m/s; measured TTV per feature stayed between 0.010 e 0.040 milímetro, with the H2 height identified as the first place to tune for tighter tolerances.

Conteúdo técnico revisto pela equipa de engenharia da Ensoll — um fabricante de laços de fio de diamante com 10+ anos de experiência em produção.