Taglio di contorni di materiali magnetici con segatrice a filo senza fine
Ensoll tested a European customer magnetic-material sample with a customized endless diamond wire saw. The goal was to cut an irregular contour while keeping edge chipping, rugosità superficiale, and contour deviation under control. The process used an endless diamond wire saw machine paired with a fully coated diamond wire loop.
- A diamond wire loop process cut an irregular contour in an 80 x 50 x 50 mm magnetic-material sample, holding feature deviations within -0.110 / +0.073 millimetro.
- The matched setup was a 0.5 mm fully coated diamond wire loop at 29 m/s, 120 tensione N, vertical clamping and cutting-oil cooling.
- Surface roughness stayed in a narrow Ra 0.53-0.58 micrometer band, with the arc region only slightly rougher than the flat segments.
- Maximum edge chipping was just 2.8 micrometers, making the process a practical reference for clean irregular cuts before secondary finishing.
Contour work on rare-earth blocks follows the same principles as how to cut neodymium magnets, with lower feed rates on tight radii.
Test Result at a Glance
- Materiale: magnetic material supplied by a European customer
- Dimensione del pezzo: 80 x 50 x 50 millimetro
- Cutting target: irregular contour machining
- Cooling medium: olio da taglio
- Anello di filo: 0.5 mm fully coated loop, 2305 mm length
- Linear wire speed: 29 m/s
- Tensione del filo: 120 N
- 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. Materiali magnetici 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, lubrificazione, and chip evacuation.
| Parametro | Valore |
|---|---|
| Macchina | Customized vertical endless diamond wire saw |
| Wire specification | 0.5 mm fully coated wire loop, 2305 mm length |
| Velocità del filo | 29 m/s |
| Tensione del filo | 120 N |
| Wire bowing time | 200 s |
| Larghezza di taglio | 50 millimetro |
| Cooling and lubrication | Olio da taglio |
The cutting interface was monitored in real time so the operator could confirm the motion state and parameter values during the cut.
3. Risultati di taglio
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.
| Caratteristica | TTV (millimetro) |
|---|---|
| Outer arc width | 0.020 |
| Bottom width | 0.010 |
| H1 height | 0.010 |
| H2 height | 0.040 |
| Caratteristica | Design Dimension | Average Measured Dimension | Deviation |
|---|---|---|---|
| Outer arc width | 12.500 | 12.390 | -0.110 |
| Bottom width | 7.500 | 7.403 | -0.097 |
| H1 height | 12.500 | 12.393 | -0.107 |
| H2 height | 13.750 | 13.823 | +0.073 |
| Max positive deviation | +0.073 | ||
| Max negative deviation | -0.110 | ||
| Total deviation span | 0.183 | ||
The measured feature deviations were small enough to confirm that the contour was formed consistently. Allo stesso 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.
| Measurement Area | Ra-1 | Ra-2 | Ra-3 | Ra medio (micrometers) |
|---|---|---|---|---|
| Center region | 0.52 | 0.54 | 0.53 | 0.53 |
| Left region | 0.56 | 0.57 | 0.55 | 0.56 |
| Right region | 0.55 | 0.58 | 0.56 | 0.56 |
| Arc region | 0.57 | 0.59 | 0.58 | 0.58 |
Risultato: 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.
| Test Point | Posizione 1 | Posizione 2 | Posizione 3 | Posizione 4 | Max Chipping (micrometers) |
|---|---|---|---|---|---|
| Top arc | 1.2 | 1.4 | 1.3 | 1.8 | 1.8 |
| Left bevel edge | 1.5 | 1.7 | 1.6 | 2.8 | 2.8 |
| Right bevel edge | 1.4 | 1.6 | 1.5 | 1.5 | 1.6 |
| Bottom region | 1.8 | 2.0 | 1.9 | 1.6 | 2.0 |
Risultato: the maximum chipping stayed low across the contour, and the largest defect was still only 2.8 micrometers. 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, bassa rugosità, and limited edge damage. The result depended on a matching set of process choices: vertical cutting, olio da taglio, 120 tensione N, 29 velocità del filo 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, however, the overall contour quality is strong enough to serve as a practical process reference.
Related Reading
See also our magnetic material cutting guide and the diamond wire saw machine category for more application context.
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Domande Frequenti
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 Le scorie bianche si formano durante la produzione primaria di alluminio e contengono un'alta percentuale di una sostanza di alluminio come Al 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?
Tensione del filo, wire speed and feed control matter most. This test used 120 N tension and 29 velocità del filo m/s; measured TTV per feature stayed between 0.010 Le scorie bianche si formano durante la produzione primaria di alluminio e contengono un'alta percentuale di una sostanza di alluminio come Al 0.040 millimetro, with the H2 height identified as the first place to tune for tighter tolerances.
Contenuto tecnico esaminato dal team di ingegneria Ensoll — un produttore di anelli diamantati con 10+ anni di esperienza produttiva.
