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首页> 外文期刊>Procedia CIRP >Tool Life Time Extension with Nano-crystalline Diamond Coatings for Drilling Carbon-fibre Reinforced Plastics (CFRP)
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Tool Life Time Extension with Nano-crystalline Diamond Coatings for Drilling Carbon-fibre Reinforced Plastics (CFRP)

机译：钻碳纤维增强塑料（CFRP）的纳米晶体金刚石涂层可延长刀具寿命

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摘要

Carbon fibre reinforced plastics (CFRP) are delicate to machine as the material is highly abrasive and tends to show multiple workpiece damages like delamination, fibre pull out, uncut fibres and burnt matrix material. In result machining CFRP requires on the one hand tools which can withstand the massive wear, on the other hand geometrical highly adaptable tools to produce flawless workpieces. Diamond coated solid carbide tools can provide an excellent wear resistance in combination with a highly adaptable tool geometry. Nano-crystalline diamond coatings provide a good layer adhesion and can be applied to machining tools. This study focuses on required drilling tool characteristics for a large tool life time of diamond coated carbide tools. The workpiece material used is the M21/35%/370H5/AS4C-6K from Hexcel? which finds its main application in the aircraft industry. The machining tests are being conducted using a Mori Seiki NMV5000DCG at different feed rates and cutting velocities. Two different nano-crystalline diamond coatings are being evaluated regarding wear resistance depending on the drill geometry and tool diameter. The workpiece quality is measured using a microscope. It is shown that the tool geometry influences the wear resistance intensively. A change in wear resistance depending on the tool geometry is not unique for different diamond coatings. Finally, it is shown that cutting velocity and feed have only a small influence on tool life time.
机译：碳纤维增强塑料（CFRP）易加工，因为该材料具有很高的磨蚀性，并且往往会表现出多种工件损坏，例如分层，纤维拉出，未切割的纤维和烧毁的基体材料。结果，CFRP的加工一方面需要承受巨大磨损的工具，另一方面需要几何形状高度适应性强的工具才能生产出无瑕疵的工件。金刚石涂层的整体硬质合金刀具可提供出色的耐磨性以及高度适应性的刀具几何形状。纳米晶金刚石涂层具有良好的层间附着力，可用于机加工工具。这项研究的重点是在金刚石涂层硬质合金刀具的较长使用寿命内所需的钻具特性。使用的工件材料是Hexcel的M21 / 35％/ 370H5 / AS4C-6K？它的主要应用领域是飞机工业。使用森精机NMV5000DCG在不同的进给速度和切削速度下进行机加工测试。根据钻头的几何形状和刀具直径，正在评估两种不同的纳米晶金刚石涂层的耐磨性。使用显微镜测量工件质量。结果表明，刀具的几何形状会严重影响耐磨性。对于不同的金刚石涂层，取决于刀具几何形状的耐磨性变化并不是唯一的。最后，表明切削速度和进给对刀具寿命的影响很小。

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