Drilling analysis of woven glass fiber-reinforced/epoxy composites

Khashaba, U.A.; El-Sonbaty, I.A.; Selmy, A.I.; Megahed, A. A.

doi:10.1177/0021998312438620

Cited by 48 publications

(32 citation statements)

References 32 publications

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“…Moreover, the processing temperature must not exceed glass transition temperature of resin. 3 Besides, owing to the low thermal conductivity of titanium alloy, the cutting heat produced in titanium machining is mainly transmitted by chips and cutting tools. 16 BS Rao et al 10 presented that lower feeds and higher speeds may produce higher drilling temperature because of the low thermal conduction coefficient and the low transition temperature of composites.…”

Section: Introductionmentioning

confidence: 99%

Effect of drilling parameters and tool geometry on drilling performance in drilling carbon fiber–reinforced plastic/titanium alloy stacks

Wei

Ming

et al. 2016

Advances in Mechanical Engineering

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An experimental study on drilling of carbon fiber-reinforced plastic/titanium alloy was conducted using three kinds of drills to investigate the cutting process. This research was mainly focused on the drilling forces, drilling temperatures, chips, and delamination area with respect to the cutting parameters and tool geometries. One type of tungsten carbide twist drill and two types of chemical vapor deposition diamond-coated drills which were multi-facet drill and brad spur drill, respectively, were used in this research. The influence of drilling parameters and tool geometries was analyzed and the conclusions were drawn that the proper selection of drilling parameters and drill geometries could lead to better hole quality. Experimental results indicated that the drilling forces and hole quality have a strong connection with feed rate while the impact of cutting speed is small. Research results also showed that the use of multi-facet drill could reduce the delamination greatly and thus produced a better surface integrity. Besides, drilling temperature and titanium alloy chips were studied in this research.

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Section: Introductionmentioning

confidence: 99%

Effect of drilling parameters and tool geometry on drilling performance in drilling carbon fiber–reinforced plastic/titanium alloy stacks

Wei

Ming

et al. 2016

Advances in Mechanical Engineering

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“…Since low feed rate may help reducing the delamination, 21 the upper limit of feed rate is made 155 mm/min. The spindle speed, as proved by Khashaba et al 22 and Lopez-Arraiza et al, 23 should be kept in the most common level (less than 3000 r/min) to prevent the deterioration of matrix caused by the generated temperature.…”

Section: Experimental Set-up and Coefficients Determinationmentioning

confidence: 97%

“…The integration limits 11 , 12 and 21 , 22 in equation (8) and equation (10) will be discussed later.…”

Section: Thrust Force On Cutting Lipsmentioning

confidence: 99%

An analytical method for predicting the fluctuation of thrust force during drilling of unidirectional carbon fiber reinforced plastics

Meng

Zhang

Cheng

et al. 2014

Journal of Composite Materials

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This paper devotes to predicting and analyzing the fluctuation of the thrust force during drilling of unidirectional carbon fiber reinforced plastics (UD-CFRPs). The fluctuation properties could be evaluated by the average value, maximum value, minimum value, change frequency and the amplitude of thrust force. Firstly, an orthogonal cutting model is introduced, and the model is modified in order to reveal how the drilling parameters affect the fluctuation. Secondly, the cutting lips are assumed to conduct orthogonal cutting, and the thrust force generated on cutting lips is calculated by using the orthogonal cutting model. Thirdly, the variable parameter, which leads to the fluctuation of thrust force, involved in the analytical model is analyzed separately. Lastly, experiments were conducted to determine the coefficients and testify the model. The comparison between the theoretical values and the experimental results prove that the analytical model can predict the fluctuation of thrust force well.

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“…When frontal cutting edges enter a new layer, the thrust force increases with increasing of uncut-chip area. 24 With the decreasing thickness of this layer, a valley in the thrust force occurs due to a decrease in stiffness. In addition, due to the radial rake angle γ r at the tip of the frontal cutting edge, the radial component of the cutting force pulls the aramid fibres from the outside to the drill centre, which can cause the aramid fibres to be pre-tensioned before their fracture.…”

Section: Geometrical Characteristics and Mechanisms Of Actionmentioning

confidence: 99%

Comprehensive investigation of cutting mechanisms and hole quality in dry drilling woven aramid fibre–reinforced plastic with typical tools

Liu

Yang

Liu

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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Due to high specific strength and strong toughness, aramid fibre–reinforced plastics have been widely used in the aircraft, military, and automobile industries. However, in the hole-making process, these excellent properties make aramid fibre–reinforced plastics difficult to machine and prone to severe entrance and exit damages. In this article, the cutting mechanisms of three typical tools (twist drill, burr tool, and brad drill) are thoroughly investigated during dry drilling of aramid fibre–reinforced plastic. On this basis, systematic experiments are conducted to evaluate the cutting performance and hole quality. At the hole entrance, the cutting edges of the twist drill peel and tear the uncut material, which results in severe fuzzing damage. Due to the radial rake angles of the burr tool and brad drill, the radial component of the cutting force can pre-tension aramid fibres prior to being cut, which effectively reduces the fuzzing defect. At the hole exit, the extrusion action of the chisel edge and the severe chip adherence are the main causes of exit damage for the twist drill and burr tool, respectively. Due to the decrease in the thrust force and improvement in the shearing action, the best hole quality is achieved by the brad drill. To further improve the hole quality, an auxiliary approach using collars is introduced to effectively restrain the damage by enhancing interfacial bonding strength. This article provides comprehensive and available information on tool performance for drilling aramid fibre–reinforced plastics, which can help guide process optimizations to achieve the desired hole quality.

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Drilling analysis of woven glass fiber-reinforced/epoxy composites

Cited by 48 publications

References 32 publications

Effect of drilling parameters and tool geometry on drilling performance in drilling carbon fiber–reinforced plastic/titanium alloy stacks

Effect of drilling parameters and tool geometry on drilling performance in drilling carbon fiber–reinforced plastic/titanium alloy stacks

An analytical method for predicting the fluctuation of thrust force during drilling of unidirectional carbon fiber reinforced plastics

Comprehensive investigation of cutting mechanisms and hole quality in dry drilling woven aramid fibre–reinforced plastic with typical tools

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