Influence of weave structure on delamination when milling CFRP

Hintze, Wolfgang; Cordes, Marcel; Koerkel, Gregor

doi:10.1016/j.jmatprotec.2014.09.004

Cited by 71 publications

(32 citation statements)

References 17 publications

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“…During milling, the surface fibers are bent by the milling force. Due to a lack of external support, the fibers are debonded under the milling force [19,20]. The stiffness of the carbon fiber is decreased, and the carbon fibers are pushed to the outside, so that they cannot be cut off by the mill over time.…”

Section: Methodsmentioning

confidence: 99%

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Surface Quality of Staggered PCD End Mill in Milling of Carbon Fiber Reinforced Plastics

et al. 2017

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Machined surface quality determines the reliability, wear resistance and service life of carbon fiber reinforced plastic (CFRP) workpieces. In this work, the formation mechanism of the surface topography and the machining defects of CFRPs are proposed, and the influence of milling parameters and fiber cutting angles on the surface quality of CFRPs is obtained, which can provide a reference for extended tool life and good surface quality. Trimming and slot milling tests of unidirectional CFRP laminates are performed. The surface roughness of the machined surface is measured, and the influence of milling parameters on the surface roughness is analyzed. A regression model for the surface roughness of CFRP milling is established. A significance test of the regression model is conducted. The machined surface topography of milling CFRP unidirectional laminates with different fiber orientations is analyzed, and the effect of fiber cutting angle on the surface topography of the machined surface is presented by using a digital super depth-of-field microscope and scanning electron microscope (SEM). To study the influence of fiber cutting angle on machining defects, the machined topography under different fiber orientations is analyzed. The slot milling defects and their formation mechanism under different fiber cutting angles are investigated.

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Section: Methodsmentioning

confidence: 99%

“…The deformation of the fiber layer will gradually recover after cutting; however, the delamination defect is permanent as the matrix loses its adhesive capacity. Interlayer delamination defects may occur in any fiber layer of the milling fracture [19,20]. If they occur on the surface, there will be tear and burrs.…”

Section: Introductionmentioning

confidence: 99%

Surface Quality of Staggered PCD End Mill in Milling of Carbon Fiber Reinforced Plastics

et al. 2017

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“…Çalışmalarda farklı takımların ve takım geometrisinin delaminasyon ve kesme kuvvetlerine etkisinin araştırıldığı durumlara da rastlanmaktadır [8,9]. Ayrıca fiber oryantasyonunun karbon fiber takviyeli kompozitlerin işlenmesindeki etkilerinin araştırıldığı çalışmalarda literatürde mevcuttur [10][11][12][13].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Karbon fiber takviyeli kompozit (KFTK) malzemelerin frezelenmesinde delaminasyon ve kesme kuvvetlerinin değerlendirilmesi ve matematiksel modellenmesi

Yağmur

Kurt

Şeker

2019

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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Highlights:Graphical/Tabular Abstract  Milling of carbon fiber reinforced composites  Effects of different geometry tools on delamination  ANOVA statistics for delamination and cut3Nowadays, weight reducing is become possible with composite materials taking placeof steel (60-80) and aluminum (20-50%). Composite materials have become the preferred materials for many engineering applications. However, besides the advantages of composite materials, there are problems in manufacturing.Manufacturing of fiber-reinforced composite materials are more difficult than other materials. This situation needs to be very selective in terms of cutting tools. In this study, contour millind was realized of carbon fiber reinforced composite materials with PCD cutting tolls. Delamination and cutting forces have been studied investigated. After the experiments, it has been seen that increasing the cutting speed has a positive effect on the delamination, cutting forces and the best performance has shown the T1. According to ANOVA statistics, the most effective parameter in terms of delamination is cutting speed. According to ANOVA statistics, the most effective parameter in terms of cutting forces is second clearance angle. A schematic representation of the experimental setup is shown in Figure 1. Figure A. Schematic representation of the experimental setupPurpose: In this study, a unique PCD cutting tool design was devised which is capable of eliminating the encountered difficulties, especially the delamination problem on laminated/laminar formed composite board during machining carbon fiber reinforced composite (CFRC) materials. And cutting tools performance has been investigated in terms of delamination and cutting forces. Theory and Methods:Contour milling of KFTK materials was carried out with PCD cutting tools. The experiments were performed at the CNC vertical machining center. Three different cutting speed and constant feed rate used in experiments. Results:T1 tool has shown the best performance in terms of delamination and cutting forces between the designed and manufactured of the cutting tools. The best result in terms of delamination occurred at a cutting speed of 450 m / min with T1 tool. Cutting speed increase positively influenced delamination and cutting forces. According to model results the most important parameter affecting delamination is the cutting speed Conclusion:The performance of the designed and manufactured cutting tools are very good. The T1 coded cutting tool has the best performance among these cutting tool.

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“…Pecat et al [12] investigated the relationship between the cutting parameters, conditions and the surface integrity of CFRP. Hintze et al [13] studied the correlation between weave-induced fiber undulation and delamination when milling CFRP. Leone et al [14] proposed a laser-milling method for CFRP.…”

Section: Introductionmentioning

confidence: 99%

Development of a Staggered PCD End Mill for Carbon Fiber Reinforced Plastic

et al. 2017

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This work presents a PCD (polycrystalline diamond) end mill with a new staggered structure for the milling of CFRP (carbon fiber reinforced plastic). The magnitude and direction of cutting force is decreased and changed by side-edge re-configuration of the structure. The flute and insert pocket of the staggered PCD end mill are designed considering the tool's stiffness and welding process. The milling process and machining defects of the staggered PCD end mill are analyzed, and the structural parameters of the staggered PCD end mill are determined. The staggered PCD end mill is fabricated by the process of wire cutting, NC (Numerical Control) machining, high-frequency induction brazing, welding, grinding and passivation. Milling tests of multidirectional CFRP with the staggered PCD end mill is conducted on CNC (Computerized Numerical Control) milling machine. The milling force is measured by a dynamometer. A range analysis of the numerical results of milling force is conducted after milling test, and the influence of milling parameters on milling force is analyzed. A regression model of the milling force is built and verified by experiment. The effects of fiber cutting angle on milling force are obtained through milling CFRP with different fiber orientation angles.

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Influence of weave structure on delamination when milling CFRP

Cited by 71 publications

References 17 publications

Surface Quality of Staggered PCD End Mill in Milling of Carbon Fiber Reinforced Plastics

Surface Quality of Staggered PCD End Mill in Milling of Carbon Fiber Reinforced Plastics

Karbon fiber takviyeli kompozit (KFTK) malzemelerin frezelenmesinde delaminasyon ve kesme kuvvetlerinin değerlendirilmesi ve matematiksel modellenmesi

Development of a Staggered PCD End Mill for Carbon Fiber Reinforced Plastic

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