Multiple Sensor Monitoring of CFRP Drilling to Define Cutting Parameters Sensitivity on Surface Roughness, Cylindricity and Diameter

Álvarez-Alcón, M.; Lacalle, Luís Norberto López de; Fernández-Zacarías, Francisco

doi:10.3390/ma13122796

Cited by 18 publications

(12 citation statements)

References 42 publications

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“…Vibration amplitude is a function of force and has a significant influence on circularity [94]. It was also noted that thrust force and torque cause compression, bending, and shear stresses and these loads give rise to cylindricity and deviation from nominal hole size [95]. When comparing the machining conditions, cryogenic machining significantly improves cylindricity.…”

Section: Hole Cylindricity and Perpendicularity Analysismentioning

confidence: 99%

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

Köklü

Morkavuk

Featherston

et al. 2021

Int J Adv Manuf Technol

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S2 glass fibre reinforced epoxy composites are widely used in aeronautical applications owing to their excellent strength to weight ratio. Drilling glass fibres can be cumbersome due to their abrasive nature and poor thermal conductivity. Moreover, the use of conventional coolants is not desirable due to contamination and additional costs for cleaning the machine part. An alternative is to use environmentally friendly coolants such as liquid nitrogen (LN2) which have been previously employed in machining metals and composites. The current study investigates the effect of drilling S2 glass fibre composite in a bath of LN2. The study aims to evaluate the effect of spindle speed, feed rate and the presence of cryogenic cooling on the form and dimensional tolerances of the hole (hole size, circularity, cylindricity and perpendicularity). Design of experiments and analysis of variance (ANOVA) were used to determine the contribution of the input parameters on the analysed hole quality metrics. Results indicated that drilling S2 glass fibre in a cryogenic bath increased hole size significantly beyond the nominal hole diameter. The hole circularity and cylindricity were reduced compared to holes drilled under dry condition under all cutting parameters due to enhanced thermal stability during the drilling process. The current study aims to provide the scientific and industrial communities with the necessary knowledge on whether cryogenic bath cooling strategy provides better hole quality output compared to dry drilling and other cryogenic cooling strategies which were previously reported in the open literature.

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Section: Hole Cylindricity and Perpendicularity Analysismentioning

confidence: 99%

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

Köklü

Morkavuk

Featherston

et al. 2021

Int J Adv Manuf Technol

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show abstract

“…In another study, multiple sensor monitoring of thrust force, torque and spindle electric power during CFRP drilling for various cutting ratios was shown in. 44 The influence of cutting ratios on machined hole surface quality were studied.…”

Section: Introductionmentioning

confidence: 99%

In-situ cutting temperature and machining force measurements during conventional drilling of carbon fiber polymer composite laminates

Kubher

Gururaja

Zitoune

2021

Journal of Composite Materials

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The evolution of in-situ cutting temperature and machining forces during conventional drilling of multi-directional carbon fiber reinforced polymer (MD-CFRP) laminates using a novel inverted drilling setup is presented. The in-situ cutting temperature was measured using fiber Bragg grating (FBG) optical sensor embedded in the stationary drill. The effect of machining parameters such as spindle speed and feed rate on the temperatures and machining forces were studied that indicate the predominant effect of spindle speed on machining temperatures. The drilled MD-CFRP samples and drill bits were characterized by scanning electron microscopy (SEM) and micro-computed tomography ([Formula: see text]) techniques to assess machining-induced damage in the samples and tool wear in the drill bits. Exit-ply delamination was observed in MD-CFRP samples that aggravates with increase in cutting temperature and thrust force caused by evolving tool wear. The measured in-situ machining temperatures using the current experimental setup can be used to achieve better machining models.

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“…[ 2 ] The need to know the torque during drilling process is known through many papers, regarding the torque modeling, simulation, experimentation, or monitoring. [ 3–4 ]…”

Section: Introductionmentioning

confidence: 99%

“…Most experimental tests are performing using dynamometric platforms that allow of mechanical actions, forces, and moments. [ 3–5 ] However, the moment measurement is made in the center of the dynamometer, being necessary to know the position in relation to tool. The main parameter necessary to evaluate the drilling behavior for material composite is the torque.…”

Section: Introductionmentioning

confidence: 99%

“…[2] The need to know the torque during drilling process is known through many papers, regarding the torque modeling, simulation, experimentation, or monitoring. [3][4] During the cutting process of composite materials, the assembly of cutting parameters is one of the main conditions in achieving the criteria regarding the condition and quality of the process. The study aims to highlight the main measurement and condition encountered in the drilling of the composite materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Metrological Determination of Torque for Monitoring During Composite Drilling Process

Bîșu

Dinu

Zapciu

2021

Macromolecular Symposia

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Drilling of composite materials is difficult to carry out due to the non-homogeneous and anisotropic proprieties. Many composite materials are subjected to the drilling process and at the same time a series of problems are generated which lead to the difficulty of processing. Among these problems are those related to the errors of the machined hole as well as the premature wear of the drill tool. In this context, a method of monitoring the torque during processing can provide important information on the quality of the process. A metrology method allows determining the torque and its correlation with the tool position during the drilling process. A measurement procedure based on dynamometric technology is designed to highlight the various parameters required for processing.

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Multiple Sensor Monitoring of CFRP Drilling to Define Cutting Parameters Sensitivity on Surface Roughness, Cylindricity and Diameter

Cited by 18 publications

References 42 publications

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

The effect of cryogenic machining of S2 glass fibre composite on the hole form and dimensional tolerances

In-situ cutting temperature and machining force measurements during conventional drilling of carbon fiber polymer composite laminates

Metrological Determination of Torque for Monitoring During Composite Drilling Process

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