Absolute Machine Tools offers solutions for manufacturers machining graphite and burning electrodes, including the Tongtai TMV-510G and Accutex Die Sinkers.
Benefits of TMV-510G Graphite Machining Centers
The TMV-510G is engineered for efficient production of precision graphite electrodes and similar items. This milling machine was solely designed for machining electrodes in graphite with particular attention paid to high spindle speeds, material containment and compact size that consumes very little valuable floor space.
Graphite machining centers are made for electrode manufacturing with several key differences from typical machining centers which include:
Higher Spindle Speeds
Higher spindle RPMs are needed for faster program feed rates to achieve finer finishes. The standard RPM for the Tongtai TMV-510G is 20,000, but higher spindle speeds are offered as an option. Program feeds rates in graphite mills are also necessary for highly complex programs that are often created to cut graphite. This combination of fast RPMs and program processing is necessary for producing the finest of electrodes.
Seals & Covers in Graphite Machining Centers
Special seals and covers are also specifically designed to protect graphite milling machines from typical wear and tear that graphite dust loves to offer. Contaminating components such as spindles and ballscrews can be very costly both in repairs and downtime. However, contamination of nearby machines can also occur, as can health issues to operators, so preventing graphite dust from escaping the work envelope is imperative.
Dust Collection & Containment Components
Dust collection and containment components designed in tandem with a CNC machine tool are critical to managing and collecting graphite dust produced during milling, and the Tongtai TMV-510G is no exception. Absolute offers Donaldson Torit CFM dust collectors and filtration systems with piping to evacuate and collect fine graphite dust, however, other major brands of such systems can also be considered if there is a preference.
Graphite Electrodes and EDM Processes
The use of graphite electrodes is common in the EDM process, providing an economical solution compared to other electrode materials, and less wear on the electrode itself. Absolute also offers a wide selection of AccuteX Die Sinkers for burning.
The AccuteX Die Sinker DS ZNC (manual) series of four RAM-type EDM machines can handle maximum workpiece sizes from 38″ x 22″ x 14.9″ (965 mm x 558 mm x 378 mm) to 67″ x 39″ x 22″ (1700 mm x 990 mm x 558 mm). It’s optional COC-280 Orbit Cut System, when added to the standard Automatic Z Axis Step function, performs like a full 3D machine producing super fine finishes down to 0.18 Ra µm and accuracies to 0.0002″ easily and efficiently.
The AccuteX Die Sinker CMAX Series is a RAM-type CNC EDM machine offering a full range of 10 different model sizes and capabilities. The fully functional C-Axis can be fit with any commercial chuck for electrode holding compatibility and can hold up to 50 pounds. Shuttle and rotary automatic electrode changers or standalone FANUC or Mitsubishi robot can be installed to accommodate untended operations from roughing to finishing changing electrodes and work pieces.