Articles and discussions about CVD diamond coating technology, the applications of PCD, CBN, and other superhard cutting tools in composite materials and graphite machining, industry news, machining techniques, latest products, innovations and inventions, industry stories…
Kevlar composites such as K-1226 AFRP offer exceptional characteristics, making them ideal for aerospace, defense, and automotive applications. However, their anisotropic nature and abrasive fibers make machining challenging, often resulting in fiber pull-out, tool clogging, and rapid wear. This article discusses machining strategies, including optimized tool geometry, cryogenic cooling, parameter adjustment, and surface reinforcement techniques (e.g., fiberglass overlays) to improve tool life and surface quality.
With PCD combination tools, complicated profiles can be finished in one step, and result in highly precise dimensions, even using simple machine,
Nanocrystal coatings are smooth, dense, and feature a low coefficient of friction, reduced cutting resistance, and lower cutting heat, resulting in superior surface finish and faster cutting parameters (S, F).
Compared to microcrystal diamond coating, tool life of nanocrystal diamond coated tool is significantly extended.
Nanocrystal-coating costs are approximately 50% higher than microcrystal coatings. For example, using a standard D6 * 65 end mill, the cost increases by about $3 per tool.
Addressing coating difficulties in 10×-diameter ultra-long end mills (10×diameter length) for graphite electrode machining, this study introduces dynamic pressure-compensated fixtures and gradient multi-stage deposition. By applying 5-8 diamond layers (5-10μm per stage) with stress-relief annealing, the solution resolves adhesion and thermal distortion issues in 10×-length edges, achieving 10× longer tool life for high-performance graphite electrode production.
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