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首页> 美国卫生研究院文献>Materials >Investigation on an Innovative Method for High-Speed Low-Damage Micro-Cutting of CFRP Composites with Diamond Dicing Blades
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Investigation on an Innovative Method for High-Speed Low-Damage Micro-Cutting of CFRP Composites with Diamond Dicing Blades

机译：金刚石切粒刀对CFRP复合材料高速低损伤微切削的创新方法研究

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摘要

This paper presents an innovative method for high-speed micro-cutting of carbon fiber reinforced plastics (CFRP). It employs a diamond dicing blade for micromachining applications, with a thickness of about 200 μm and rotational speeds up to 30,000 rpm so as to meet the low-damage surface integrity requirements. The process parameters, cutting damage, surface roughness, and the spindle vibration were thoroughly investigated to evaluate and validate the method. The results indicate that a high cutting speed up to 76 m/s not only remarkably increases the rigidity of an ultra-thin dicing blade, but also decreases the cutting depth per diamond grit to below 10 nm, both of which are very conducive to obtaining a very fine machined surface of about Ra 0.025 μm, with no obvious damage, such as delamination, burrs, and fiber pull out. The serious spindle vibration limits the rotational speed to increase further, and the rotational speed of 25,000 rpm achieves the best fine machined surface. Furthermore, unlike most research results of the drilling and milling method, the proposed micro-cutting method obtains the maximum cutting current and surface roughness when cutting at 0° fiber orientation, while obtaining a minimum cutting current and surface roughness when cutting at 90° fiber orientation. The metal-bonded dicing blade achieves smaller surface roughness than the resin-bonded dicing blade. This paper also discusses the cutting mechanism by investigating the morphology of the machined surface and concludes that the micro breakage and plastic-flow in local regions of fibers and resin are the main material removal mechanisms for dicing CFRP composites with a diamond abrasive blade.
机译：本文提出了一种用于碳纤维增强塑料（CFRP）的高速微切割的创新方法。它为微加工应用采用了金刚石切割刀片，其厚度约为200μm，转速高达30,000 rpm，以满足低损伤表面完整性要求。彻底研究了工艺参数，切削损伤，表面粗糙度和主轴振动，以评估和验证该方法。结果表明，高达76 m / s的高切削速度不仅显着提高了超薄划片刀片的刚度，而且还将每颗金刚石砂的切削深度降低至10 nm以下，这两者都非常有利于获得约Ra 0.025μm的非常精细的加工表面，没有明显的损坏，例如分层，毛刺和纤维拉出。严重的主轴振动限制了转速的进一步提高，并且25,000 rpm的转速可实现最佳的精加工表面。此外，与大多数钻铣方法的研究结果不同，所提出的微切割方法在0°纤维取向下进行切割时可获得最大的切割电流和表面粗糙度，而在90°纤维下进行切割时可获得最小的切割电流和表面粗糙度。取向。金属结合的切割刀片比树脂结合的切割刀片具有更小的表面粗糙度。本文还通过研究机加工表面的形态来讨论切削机理，并得出结论，纤维和树脂局部区域的微破裂和塑性流动是用金刚石磨料刀片切割CFRP复合材料的主要材料去除机理。

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