Hole making is one of the most common machining operations in fibrous composites. Holes can be produced using conventional technologies. However, these cases, size delamination and burr appearance are often significant mostly due to relatively large axial cutting forces. The main purpose this research paper optimise compare tilted helical milling processes case carbon glass fibre reinforced polymer (CFRP GFRP) In scope paper, numerous experiments were carried out on CFRP GFRP composites an...

Currently, hole drilling is the most required machining operation in post-production of carbon fibre reinforced polymer (CFRP) composites. Besides CFRP's difficult-to-cut nature and its considerable wear effect, some novel industrial digitalisation modernisation inspired challenges appeared last few years will possibly be a determining phenomenon research development processes CFRPs. The main aim this short review paper to summarise recent difficulties, expectations CFRPs highlight possible...

Measuring and characterizing of surface roughness machined surfaces carbon fiber reinforced polymer (CFRP) composites are difficult due to the occurrence special damages (delamination, uncut fibers, pull-outs or micro-cracks, etc.). The main objective present study is analyze characteristics unidirectional CFRP in detail. Numerous conventional drilling, helical milling, edge trimming experiments were carried out with different cutting tools order influence them on average (Ra), depth (Rz) Rz...

Abstract Due to its excellent specific mechanical properties, carbon fibre-reinforced polymer (CFRP) composite is a widely used structural material in the aerospace industry. However, this difficult cut, mainly due inhomogeneity and anisotropic features because of strong wear effects fibres. In scope industrial uses material, thousands holes have be machined for purposes assembly. Nevertheless, conventional drilling technology – even if special tools are only moderately able manufacture good...

Mechanical drilling-induced burr in carbon fibre reinforced polymer (CFRP) composites is one of the most significant macro-geometrical failures CFRP composites; nevertheless, prediction quasi-randomly oriented chopped not supported yet. To explore this issue, main aim present research work was to develop a method predict burrs CFRPs based on digital image processing. First, an indexable light source captured images plate different lighting conditions. Then, orientation each visible group...

Glass fiber reinforced polymer (GFRP) composites are becoming more attractive in modern engineering fields due to their outstanding mechanical/physical properties. However, a thorough understanding of drilling machinability is seriously lacking the research community. The present work aims address behavior woven GFRP under varying cutting speeds and feed rates. Machining studies were conducted using two different diamond-coated special tools involving double point angle drill dagger drill....

We developed flame retarded polyimine type vitrimers and carbon fibre reinforced composites using two additive a reactive retardant containing phosphorus: ammonium polyphosphate (APP), resorcinol bis(diphenyl phosphate) (RDP); N,N',N''-tris(2-aminoethyl)-phosphoric acid triamide (TEDAP). characterised the vitrimer matrix materials by differential scanning calorimetry (DSC), thermal analysis (TGA), limiting oxygen index (LOI), UL-94 test mass loss (MLC), while LOI, test, MLC dynamic...

Abstract Since governments encourage sustainability, industries are making great efforts to reuse or recycle carbon fibre–reinforced polymer (CFRP) composites. Despite the promising early results concerning material properties of recycled CFRP, there is no published knowledge available about their machinability. In this study, drilling-induced micro and macro-sized geometrical defects were analysed compared in virgin CFRP. A total 180 drilling experiments carried out using uncoated solid...

Drilling-induced delamination is the most severe material defect in fibrous polymeric composites. Although many measurement methods are available, outputs of recent digital image processing (DIP) based significantly affected by non-drilling induced defects and anomalies like cavities or dirty textured surfaces. Therefore, main aim present research was to develop a method capable drilling-induced composites on differentiation principle. In an attempt implement this principle, images undrilled...

Carbon fibre-reinforced plastic (CFRP) has good specific mechanical properties, it is, therefore, an often used structural material in the high-tech industries. Due to anisotropy and inhomogeneity of CFRP, machining properties are highly depending on cutting directions. Based previous experimental works, a new trochoid tool patch was developed order minimise force uncut fibres when milling unidirectional CFRP. The main objective present work is test analyse effect special technology quality...

Abstract Machining of carbon fibre reinforced polymer (CFRP) composites is extremely difficult, mainly due to their inhomogeneous and anisotropic properties. Predicting cutting force during machining CFRP also difficult because the machinability properties composite are significantly orientation-dependent (fibre directions). The main objective present study analyse influence orientation on in milling unidirectional CFRP. Up down experiences were conducted based a full factorial design....

Abstract Currently, the use of sustainable products and technologies is growing; consequently, mineral-origin basalt fibre-reinforced polymer (BFRP) composites are becoming more popular in industries. Although BFRP parts require mechanical drilling operations for manufacturing holes assembly, many challenges make process difficult. Considering that cutting force one main parameters characterising process, this study aims to analyse influence feed (mm/rev) speed (m/min) on thrust model...

Abstract Orbital drilling (helical milling) process with fixed and optimised technological parameters is suitable to produce good-quality holes in carbon fibre reinforced polymer (CFRP) composites, however, after the tool wear increases, monitoring of often required order keep machined good-quality. The main objective present research was develop an algorithm for diagnostics orbital using digital image processing characteristics uncut fibres. Drilling depth screw pitch helical path have...