CVD diamond tools with PCD cutting tool performance comparison – diamond cutting
CVD Diamond Because of its polycrystalline structure, can produce more than the actual fracture toughness of natural diamond (fracture resistance). This feature in intermittent cutting and Grinding wheel Dressing and other offensive Machinery Processing proved to be very useful. In general, CVD diamond is similar to the mechanical firmness firmness of advanced ceramics. Careful design and manufacture of CVD diamond
separate sheet of fracture toughness, strength and other key properties, can improve for the CNC rotary grinding wheel dressing, high-speed or nearly dry machining of aluminum and high performance metal matrix composite materials Tools .
CVD diamond tools with PCD cutting tool similar to the way of manufacturing, diamond blades are brazed tungsten carbide or high speed steel body with an incision in the corner, and then fine grinding diamond wheel cutter. Thick diamond blade solid brazing technology of the 20th century 90's developed the technology to solve a pair of metal cutting film, diamond coated cemented carbide inserts and cutter body bond selection problem. The diamond coating for carbide cutting blade of the knife body select bond and has been widely perceived as cutting have a negative impact. Most independent for CVD diamond thick film cutting tools material thickness of about 0.5mm. Relatively smooth, fine particles (about 1 m) nucleation surface is generally polished, used as a cutting tool forward surface; side of the surface of coarse particles (> 50 m) by vacuum brazing tungsten carbide cutter body or high speed steel body.
Although the strict control of CVD processes is the key, but the final decision on the quality and cutting edge tool manufacturing firm of, or tools. Most experienced manufacturer of industrial usually used for grinding wheel PCD and CVD diamond material to meet the increase of hardness, they extended grinding time.
J & M Diamond Tool Company with a formula of the grinding wheel PCD CVD diamond, in contrast to PCD cutting tools, grinding the blade to a CVD diamond cutting tools and more than 10% to 20% of the time. However, grinding the blade to extend the time, can make better than the PCD tool cutting tool manufacturers to obtain the blade surface roughness. Because CVD diamond is more resistant than the PCD, it simply increase the feed of grinding wheel will produce an excessive grinding forces and damage to CVD diamond tool cutting edge.
Thick film CVD diamond grinding can produce a brazing side, mirror surface roughness (Ra <0.05 m) of the cutting blade. In comparison with CVD diamond film coating, thick blade of the unique properties of the workpiece can produce a good surface roughness. CVD diamond thick film tool selection also provides opportunities for replacement of single crystal diamond tools.
Independent CVD diamond material of the strong resistance and wear resistance make it a high Si-Al-milling machining a wide range of applications, good choice. CVD diamond tool life when machining aluminum alloys are often commercial PCD tool life of 1.55 times. The actual improvement depends on the specific aluminum alloy, cutting tool design and manufacturing technology. CVD diamond cutting tools are often used for turning the piston, aluminum wheels for cars and other fine materials and high-Si-Al metal matrix composite materials in general machining required intermittent cutting. Although the high Si-Al is always focused on the object of CVD diamond, but diamond blade cutting tools in machining of low Si-Al materials are also more common. High productivity or precision finishing process and so require the use of diamond tools. A Car Aluminum parts manufacturing company carried out a finishing operation, CVD diamond blade cutting tool is not only durable than the PCD 30%, and the entire life of the tool can be a continuous process the required surface roughness.
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