Experimental Study on Hole Quality of Carbon Fiber Reinforced Plastics during Micro-Hole Drilling Process

2018 ◽  
Author(s):  
Jaewoo Seo ◽  
Hyung Wook Park
Keyword(s):  
Experimental Study ◽  
Carbon Fiber ◽  
Hole Drilling ◽  
Drilling Process ◽  
Hole Quality ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Micro Hole ◽  
Fiber Reinforced Plastics

Machining quality of high speed helical milling of carbon fiber reinforced plastics

2021 ◽  
pp. 095440622199673
Author(s):  
Adel Abidi ◽  
Sahbi Ben Salem ◽  
Mohamed Athmane Yallese
Keyword(s):  
Surface Roughness ◽  
Carbon Fiber ◽  
High Speed ◽  
Hole Diameter ◽  
Feed Speed ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Machining Quality ◽  
Fiber Reinforced Plastics

Among advanced cutting methods, High Speed Milling (HSM) is often recommended to improve the productivity and to reduce the costs of machining parts. As every cutting process, HSM is characterized by some defects like surface roughness and delamination are the main defects generated in composite materials. The aim of this experimental work is the studying of the machining quality of woven Carbon fiber reinforced plastics (CFRP) using the HSM technology. Experiments were done using different machining parameters combinations to make opened holes in CFRP laminates. This study investigated the effect of cutting speed, orbital feed speed, hole diameter on the delamination defect and surface roughness responses generated in the drilled holes. The design of experimental tests was generated using the approach of Central Composite Design (CCD). The characterization of these responses was treated with the Analysis of variance (ANOVA) and Response surface methodology (RSM). Results showed that the surface roughness is highly affected by the orbital feed speed (F) with contribution of 22.45%. The delamination factor at entry and exit of holes is strongly influenced by the hole diameter D (25.97% and 57.43%) respectively. The developed model equations gave a good correlation between the empirical and predicted results. The optimization of the milling parameters was treated using desirability function to minimize the surface roughness (Ra) and the delamination factor simultaneously.

Experimental Study on Delamination during Trimming of CFRP

2015 ◽  
Vol 1089 ◽  
pp. 331-336 ◽  
Author(s):  
Qing Liang Chen ◽  
Jing Wen Zhou ◽  
Xue Mei Chen ◽  
Yan Chen ◽  
Yu Can Fu
Keyword(s):  
Experimental Study ◽  
Carbon Fiber ◽  
Great Influence ◽  
Fiber Direction ◽  
Type I ◽  
Cfrp Laminates ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Inclined Angle

Carbon fiber reinforced plastics (CFRP) laminates with different top/bottom fiber direction angle (stacking sequences of each ply) are trimmed at various workpiece inclined angles. Four types of delamination are studied and discussed. The results indicate that fiber direction has great influence on the type of delamination and the workpiece inclined angle determines the proportion of each type of delamination expect a special cast that the delamination form turns into type I/II when the workpiece inclined angle is 58.6o. Stacking sequences of each ply have great influence on the numbers of damaged plies and the 0o fiber direction ply has the ability to prevent the development of damaged ply.

Studies on Disfigurement-Fee Technology of Drilling Carbon Fiber Reinforced Plastics

2007 ◽  
Vol 24-25 ◽  
pp. 125-132
Author(s):  
Yong Qi Wang ◽  
Yong Jie Bao ◽  
Hang Gao
Keyword(s):  
Carbon Fiber ◽  
Drilling Process ◽  
Fiber Reinforced ◽  
Drilling Force ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Drilling Quality ◽  
New Type ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Based on the analysis of various disfigurements of carbon fiber reinforced plastics formed in drilling process, the formation model of disfigurement is built up, and analysis results shows that the main reason of disfigurement is the exceeding cutting force. By focusing on these problems, new-type drill—super-hard electroplated abrasive drill is developed, and some experiments were carried out. Compared with the traditional sintered-carbide drill in drilling, the super-hard electroplated abrasive drill has lower drilling force, better drilling quality, higher machining efficiency, and longer life-span. A conclusion that super-hard electroplated drill is more suitable for drilling CFRP is gained.

Study on Fabrication and Cutting Performance of CVD Diamond Coated Drills in Machining the Carbon Fiber Reinforced Plastics

2011 ◽  
Vol 175 ◽  
pp. 239-244
Author(s):  
Jian Guo Zhang ◽  
Bin Shen ◽  
Fang Hong Sun
Keyword(s):  
Carbon Fiber ◽  
Tungsten Carbide ◽  
Diamond Films ◽  
Cvd Diamond ◽  
Drilling Process ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced plastics (CFRP) have been widely used for manufacturing spacecraft, aircraft and automobile structural parts in aerospace and automotive industries. However, CFRP is a kind of hard machining materials and conventional tungsten carbide drills always experience severe tool wear, and thus short lifetime in the CFRP drilling process. In this paper, the CVD diamond films are deposited on the surface of cobalt cemented tungsten carbide (WC–Co) drills using hot filament chemical vapor deposition (HFCVD) method. Scanning electron microscope (SEM) is adopted to investigate the surface morphology of as-fabricated CVD diamond coated drills, additional analysis using Raman spectrum also indicates the high purity of sp3 phase of as-deposited diamond film. Furthermore, the machining performance of as-fabricated CVD diamond coated drills is examined in drilling the CFRP, comparing with the uncoated WC-Co drills. The chisel edge and primary cutting edge wear of drills are studied using the tool microscope. The results show that as-fabricated CVD diamond coated drills exhibit a much elongated lifetime than that of uncoated WC-Co drills, and also smoother surface finish of machined holes, which is supposed to be attributed to the excellent wear resistance and satisfied adhesive strength between the as-deposited diamond films and drills.

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