Roughness of holes in metal and polymer composite bags

Chashhin, N. S.; Pashkov, A. E.; Ivanov, Y. N.; Sturov, A. A.

doi:10.1088/1757-899x/632/1/012089

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…From the ANOVA results in Table 4, it was found that the change in spindle speed affects the surface roughness to a much lower degree than the feed rate. 111 Nevertheless, the use of cryogenic coolant had the most significant contribution with 83.59% and 62.82% for R a and R z , respectively. It can be also observed that the order of the importance for the controllable cutting factors when drilling GFRPs is feed rate followed by spindle speed which is in agreement with previous studies.…”

Section: Resultsmentioning

confidence: 94%

“…From the ANOVA results in Table 4, it was found that the change in spindle speed affects the surface roughness to a much lower degree than the feed rate. 111 Nevertheless, the use of cryogenic coolant had the most significant contribution with 83.59% and Table 4. ANOVA analysis of cutting forces, surface roughness parameters and delamination factors at entry and exit sides.…”

Section: Surface Roughness Analysismentioning

confidence: 98%

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Microstructural investigation and hole quality evaluation in S2/FM94 glass-fibre composites under dry and cryogenic conditions

Giasin

Barouni

Dhakal

et al. 2020

Journal of Reinforced Plastics and Composites

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S2/FM94 glass fibre reinforced epoxy is an aerospace-grade composite currently bonded with aluminium alloys and installed in parts of the Airbus A380 fuselage. In addition to its abrasive and hard nature, S2/FM94 glass fibre is sensitive to thermal effects developed during the drilling process, and therefore using coolants becomes necessary. However, conventional oil and water-based coolants are not suitable for drilling of composites. Cryogenic coolants on the other hand are an attractive choice for machining composites and are environmentally friendly. In this study, a new environmentally friendly cryogenic cooling technique in a liquid nitrogen bath was used for the drilling of S2/FM94 glass fibre reinforced epoxy composite. The aim was to investigate the effect of drilling parameters and cryogenic cooling on cutting forces, surface roughness, hardness and delamination factor at hole entry and exit sides. The workpiece was drilled within a cryogenic bath. In this way, both cryogenic workpiece cooling and tool cooling were obtained. In addition, the drill geometry is fixed and only the cutting parameters (i.e. spindle speed and the feed rate) are varied under dry and cryogenic conditions. The results indicate that the spindle speed and cryogenic cooling had the most significant influence on the cutting forces and surface roughness parameters (Ra and Rz), while the use of cryogenic cooling had the most significant influence on increasing the hardness and size of delamination at entry and exit sides of the holes.

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Section: Resultsmentioning

confidence: 94%

“…From the ANOVA results in Table 4, it was found that the change in spindle speed affects the surface roughness to a much lower degree than the feed rate. 111 Nevertheless, the use of cryogenic coolant had the most significant contribution with 83.59% and Table 4. ANOVA analysis of cutting forces, surface roughness parameters and delamination factors at entry and exit sides.…”

Section: Surface Roughness Analysismentioning

confidence: 98%

Microstructural investigation and hole quality evaluation in S2/FM94 glass-fibre composites under dry and cryogenic conditions

Giasin

Barouni

Dhakal

et al. 2020

Journal of Reinforced Plastics and Composites

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A Study of Vacuum Assisted Resin Injection for Molding Hard-To-Reach Locations in the Manufacture of Parts

Chashchin

Koval

Груздев

2022

Lecture Notes in Mechanical Engineering

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A study of cutting forces when drilling CFRP/Ti stacks

Ivanov

Chashhin

Sultanova

2021

J. Phys.: Conf. Ser.

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Abstracts Twist drilling is a widely used machining technology for composite materials. Delamination is a serious drilling problem. The main purpose of the study is to improve the quality and productivity of the process of drilling holes in CERP/Ti stacks by minimizing delamination defects without undue changes in the cutting modes. The stack consists of a CFRP layer and titanium alloy layers. The holes are drilled with the Atlas Copco PFD-1500 automatic feed drilling machine. The HAM carbide drill was used for cutting. The range of variations in the cutting modes was selected and an experiment plan was drawn up in Statistica 6. Three factors (cutting speed, feed and accumulated cutting length) were taken into account. Using the experiment results, multivariate regression analysis models were built. They describe the effects of cutting modes and cutting length on the axial cutting force in the CFRP layer. The cutting length is the most significant factor. An increase in this factor increases the axial cutting force. An increase in feed also increases the cutting force, but its effect is less pronounced. The squared cutting speed has the least effect on the axial cutting force.

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Roughness of holes in metal and polymer composite bags

Cited by 4 publications

References 4 publications

Microstructural investigation and hole quality evaluation in S2/FM94 glass-fibre composites under dry and cryogenic conditions

Microstructural investigation and hole quality evaluation in S2/FM94 glass-fibre composites under dry and cryogenic conditions

A Study of Vacuum Assisted Resin Injection for Molding Hard-To-Reach Locations in the Manufacture of Parts

A study of cutting forces when drilling CFRP/Ti stacks

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