6/3/2008

PCD Helical End Mills And Drills

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V-tec veined rotary cutting tools, including helical end mills and drills, are PCD-coated using a high-pressure and high-temperature process that allows polycrystalline diamond (PCD) to be directly sintered into the veins that form complex geometric shapes. While PCD is typically only available in flat segments, this process allows the end mills and drills to be offered in solid-body helical geometries that are free of braze joints that may be prone to failure, making it possible to machine highly abrasive materials, the company says. Non-ferrous application materials include composites, aluminum alloys, copper alloys, metal matrix composites, ceramics, graphites, carbides, friction materials, green ceramics and magnesium.   According to the company, the advantages of the helical end mills and drills include providing a broader application range, lower production costs, improved productivity and workpiece quality, improved tool life, lower machine setup costs and reduced inventory quantities. Cutting edge sharpness and retention are said to improve surface finishes, while the helical geometry of the tools are said to lower tool forces and support better chip evacuation. The end mills and drills are designed with increased thermal conductivity and lower coefficient of friction to result in less heat buildup and adhesion.

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