{"id":9014,"date":"2026-10-29T17:34:53","date_gmt":"2026-10-29T09:34:53","guid":{"rendered":"https:\/\/www.endlesswiresaw.com\/?p=9014"},"modified":"2026-10-29T17:34:57","modified_gmt":"2026-10-29T09:34:57","slug":"isostatic-graphite-block-cutting","status":"publish","type":"post","link":"https:\/\/www.endlesswiresaw.com\/es\/isostatic-graphite-block-cutting\/","title":{"rendered":"Corte y Contorneado de Grafito Isost\u00e1tico: Seco, Sin Polvo, Con Recorte Reutilizable"},"content":{"rendered":"

A VIMFUN SVI 120-60 endless diamond wire saw. An isostatic graphite block the customer sent us. Two tests on the same machine, same wire, same clamp \u2014 slicing, then contour cutting.<\/p>\n\n\n\n

Both functions have to pass before the machine ships. That is the whole point of the Factory Acceptance Test. If slicing works but the contour pass drifts, the machine stays in the bay.<\/p>\n\n\n\n

\"Superficie<\/figure>\n\n\n\n

The Setup: Factory Acceptance Test Before Shipping<\/h2>\n\n\n\n

The SVI 120-60 is a vertical endless diamond wire saw built for corte de grafito<\/a>. It belongs to the same vertical graphite series as the IVS 80-80<\/a>, one size up. Vertical layout, closed-loop servo, endless diamond wire loop, dry-cut configuration.<\/p>\n\n\n\n

Before any SVI series machine ships, we run a two-function FAT: slicing and contour cutting on the same setup. The reason the FAT exists in that form is that SVI is sold as a multi-function vertical saw. Customers who buy it expect to slice stock in the morning and cut contour parts in the afternoon on the same clamp. If we only tested slicing, we would be shipping half a machine.<\/p>\n\n\n\n

For this unit, the customer sent 150 \u00d7 150 \u00d7 300 mm isostatic graphite blocks from their own stock. They signed off on the parameters first \u2014 180 N tension, 50 m\/s wire speed, 80 mm\/min feed, \u00d8 0.8 mm wire, dry. We ran their material at their numbers. Day one on their floor matches what we measured on ours.<\/p>\n\n\n\n

Test One: Slicing<\/h2>\n\n\n\n

Straight-line descent through the full block height. Repeated. We measured thickness on every slice with a digital caliper and spot-checked with a 0\u201325 mm micrometer. We also looked for chipped edges at entry and exit, wire marks on the face, and kerf width.<\/p>\n\n\n\n

Par\u00e1metro<\/th>Valor<\/th><\/tr><\/thead>
Pieza de Trabajo<\/td>Isostatic graphite block, 150 \u00d7 150 \u00d7 300 mm<\/td><\/tr>
M\u00e1quina<\/td>VIMFUN SVI 120-60 endless diamond wire saw<\/td><\/tr>
Alambre<\/td>\u00d8 0.8 mm electroplated bucle de hilo diamantado<\/a><\/td><\/tr>
Tensi\u00f3n del cable<\/td>180 N<\/td><\/tr>
Velocidad del cable<\/td>50 m\/s<\/td><\/tr>
Velocidad de avance<\/td>80 mm\/min<\/td><\/tr>
Refrigerante<\/td>None \u2014 dry cutting<\/td><\/tr>
Gesti\u00f3n de polvo<\/td>Negative-pressure extraction at the kerf<\/td><\/tr>
Kerf width (measured)<\/td>~0.9 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

The parameter window comes from our internal reference on la velocidad del alambre, la tensi\u00f3n y la velocidad de avance<\/a>. 180 N sits in the middle of the 150\u2013200 N band we have validated on isostatic grades. 50 m\/s and 80 mm\/min are the paired values we already ran on previous isostatic jobs.<\/p>\n\n\n\n

Measured result.<\/strong> Every slice came out within \u00b10.03 mm of nominal across the full slice area. Faces were flat. No visible wire marks under angled light. No chipped edges at entry or exit. Kerf measured 0.9 mm, matching the wire + abrasive diameter.<\/p>\n\n\n\n

We sliced 10 pieces off the first block to get a thickness distribution, not just a spot sample. Caliper reading on every slice, logged. The spread stayed inside \u00b10.03 mm from the first slice to the tenth. Wire tension did not need re-checking between cuts \u2014 the loop ran continuous, the tension sensor held 180 N through the full test.<\/p>\n\n\n\n

Dry cutting. No coolant. No slurry. No graphite mud. The dust from the kerf went straight into the negative-pressure extraction and ended up in the filter unit as dry powder. No slurry tank to drain, no coolant filter to swap, no parts to degrease before the next step. The graphite powder in the filter is dry and separable \u2014 it does not stop being graphite.<\/p>\n\n\n\n

Test Two: Contour Cutting<\/h2>\n\n\n\n

Same clamp. Same wire. Same tension setting. We did not re-fixture, did not swap the wire loop, did not change the tension. The only thing that changed was the toolpath file loaded in the controller.<\/p>\n\n\n\n

The toolpath had inside corners, outside radii, and a non-trivial profile \u2014 the kind of shape a customer would normally send to a 3-axis CNC. One continuous servo-driven pass. No tool change mid-path, because there is no tool to change: a diamond wire loop runs at constant speed and tension, and the servo axes move the workpiece under it. Straight lines and curves are the same operation at the kerf.<\/p>\n\n\n\n

Measured result.<\/strong> Inside corners held the programmed radius. Outside radii came off clean, no step marks between path segments. No witness lines at profile transition points. Edge quality on the contour matched the slicing faces \u2014 flat, no fraying, no chipped exits.<\/p>\n\n\n\n

We ran the contour toolpath twice on different sides of the same block to check repeatability. Both profiles came off within \u00b10.03 mm of the programmed path. The wire did not need re-tensioning after Test One, and did not need re-tensioning between the two contour passes.<\/p>\n\n\n\n

One side effect worth naming once: the material around the contour comes off the block as a bulk piece with one new machined face. It goes back into stock. Not pulverized to dust.<\/p>\n\n\n\n

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\"Reproductor