Drilling machinability evaluation on new developed high-strength T800S/250F CFRP laminates

Xu, Jinyang; An, Qinglong; Cai, Xun; Chen, Ming

doi:10.1007/s12541-013-0252-2

Cited by 123 publications

(66 citation statements)

References 21 publications

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“…In addition, according to the experimental results, it can be noticed that the thrust force increases as the feed rate rises at the same drilling depth, resulting in larger delamination. This finding is close to the findings proposed by Khashaba et al [8,9,22]. Figure 12 illustrates the variation of the critical thrust force (F c ) with the varying s and η when 9.6 mm≤H≤32 mm.…”

Section: Delamination Analysis Of Hole Exitsupporting

confidence: 89%

“…Therefore, in reaming stage, the delamination will be controlled in a small variation range, which leads to small variation ranges of the delamination factor and the delamination radius, as shown in Fig. 11b, c. This may be the reason for the study by Xu et al [22] that the tapered drill-reamer generates a relatively lower delamination factor compared with a traditional twist drill. In addition, from Fig.…”

Section: Delamination Analysis Of Hole Exitmentioning

confidence: 98%

“…Lazar et al [21] found that the maximum load per ply was strongly affected by the axial feed rate and the tool geometry, according to the experiments of drilling FRPs with three different tools (including the tapered drillreamer). Xu et al [22] used a chemical vapor deposition (CVD) coated twist drill bit and a CVD coated tapered drillreamer for drilling high-strength CFRP laminates (T800S/ 250F CFRP laminates), and the drilling forces, burr defect, hole wall surface morphology, and delamination damages were comparatively analyzed. The results indicated that the increase of the thrust force may exacerbate the delamination damages greatly, and the tapered drill-reamer has better drilling performance compared with the twist drill.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of thrust forces and delamination in drilling carbon-reinforced plastics (CFRPs) using a tapered drill-reamer

Wang

Yuan

et al. 2015

Int J Adv Manuf Technol

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The thrust forces and delamination in drilling carbon-reinforced plastics (CFRPs) using a tapered drillreamer have been studied by experimental and theoretical analyses. A theoretical drilling model of the tapered drillreamer has been established to study the developing process of the push-out delamination, and a comprehensive analysis for the thrust force and the delamination has been developed in the present study. The results obtained in this study show that the maximum thrust force measured in the drilling stage (F z1max ) is drastically affected by the machining parameters (spindle speed and feed rate). However, the maximum thrust force measured in the reaming stage (F z2max ) is not sensitive to the machining parameters, and the multiple N between F z1max and F z2max increases with the increase of feed rate but decreases with the increased spindle speed. Moreover, according to the theoretical drilling model, the thrust force thresholds at the onset and the propagation of delamination in the reaming stage are 29.57 and 51.34 N, respectively. In order to improve the hole quality, the length of the cutting edges of the tapered drill-reamer should be about 9.6 mm, and the improved drilling method of placing two rigid plates on both sides of CFRPs workpiece is preferred.

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Section: Delamination Analysis Of Hole Exitsupporting

confidence: 89%

Section: Delamination Analysis Of Hole Exitmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of thrust forces and delamination in drilling carbon-reinforced plastics (CFRPs) using a tapered drill-reamer

Wang

Yuan

et al. 2015

Int J Adv Manuf Technol

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“…Different researchers [3][4][5][6] have indicated that most of the hole quality problems mentioned above are mainly associated with an incorrect application of the tool geometry and inappropriate machining conditions.…”

Section: Introductionmentioning

confidence: 99%

Drilling temperature and hole quality in drilling of CFRP/aluminum stacks using diamond coated drill

Wang

Chen

et al. 2015

Int. J. Precis. Eng. Manuf.

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119

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Composite/metal stack materials, most often consisting of carbon fiber reinforced polymer (CFRP) composites and aluminum or titanium alloy (Al or Ti), have been widely used in the aviation industry. It is still a challenge to make holes on the composite/metal stack materials with high quality. This paper aims to investigate the influence of drilling parameters on the drilling of stack materials consisting of T800/X850 CFRP and 7075-T651 Al with regard to drilling force, drilling temperature, hole diameter and hole surface quality. Diamond coated drill bits with double point angles were employed in the drilling tests. The drilling temperature was measured utilizing a rotational motion temperature measuring system. It is indicated that maximum drilling temperature increases with the increase of spindle speed, while, it decreases with increasing feed rate. The thrust force and drilling temperature increase abnormally during drilling of the Al layer, which can be attributed to the evacuation difficulty of the long and flexible Al chips. It is found that sudden drops in the surface profile of CFRP are caused by the cavities owning to the resin degradation effects. The influences of different stack sequences on the drilling temperature and hole surface quality have also been discussed.

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“…Therefore, in order to use effectively CFRP material without the limitations of configuration or location, the development of various manufacturing technologies such as cutting, drilling and joining is needed. [7][8][9][10][11][12][13] Among others, a direct joining of CFRP to metal or plastic is important and necessary for their widespread applications and an improvement in the production performance concerning light weight, flexibility, downsizing and multi-functionality. Conventional joining technologies of CFRP to metal or plastic have been usually performed by using adhesive bonds, mechanical fasteners like bolts or rivets, and hybrid bonded-bolted lap joints.…”

Section: Introductionmentioning

confidence: 99%

Mechanical property and joining characteristics of laser direct joining of CFRP to polyethylene terephthalate

Jung

Kawahito

Katayama

2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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This study was performed to investigate the joining possibility and characteristics of the dissimilar joint between carbon fiber reinforced plastics (CFRP) and amorphous polyethylene terephthalate (PET) plastic using a continuous wave (cw) diode laser with a line-shaped beam. Tensile shear test results demonstrated that strong lap joints with a maximum load of 3200 N could be produced under some proper conditions, and base amorphous PET plastic sheet was elongated without fracture. It was confirmed from SEM observation that the dissimilar lap joint was tightly bonded near the joint interface between two materials, and simultaneously integrated by the interdiffusion and mixing process at the joint interface of two materials through rapid melting, solidification and cooling during laser joining. Through high speed video camera observation, the joining phenomena generating in the laser irradiated part during laser joining of CFRP to PET was obviously identified. Consequently, it was revealed that strong dissimilar lap joint of CFRP to engineering plastic could be possible by a direct laser irradiation without adhesive bonds or mechanical fasteners.

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Drilling machinability evaluation on new developed high-strength T800S/250F CFRP laminates

Cited by 123 publications

References 21 publications

Study of thrust forces and delamination in drilling carbon-reinforced plastics (CFRPs) using a tapered drill-reamer

Study of thrust forces and delamination in drilling carbon-reinforced plastics (CFRPs) using a tapered drill-reamer

Drilling temperature and hole quality in drilling of CFRP/aluminum stacks using diamond coated drill

Mechanical property and joining characteristics of laser direct joining of CFRP to polyethylene terephthalate

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