Fiber laser cutting of CFRP laminates with single- and multi-pass strategy: A feasibility study

Li, Maojun; Li, Shuo; Yang, Xujing; Zhang, Yi; Liang, Zhichao

doi:10.1016/j.optlastec.2018.06.025

Cited by 54 publications

(16 citation statements)

References 25 publications

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“…If the laser power is reduced to 1.6 kW and the cutting speed is set between 2 m/ min and 4 m/min, the excessive thermal stress on the work piece is reduced and better cut quality is obtained. Li et al [18] used a CW fiber laser to study cut quality and morphology of cut surface using multi-pass and single-pass strategies. The investigation concluded that micro cracks, delamination, holes and over hanging fibers are some of the defects detected during laser cutting of CFRP.…”

Section: Research Justificationmentioning

confidence: 99%

Laser cutting of carbon fiber reinforced plastic components for remanufacturing

et al. 2022

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Carbon fiber reinforced plastic (CFRP) is extensively used in automotive and aerospace industries with the aim to achieve reduction on emissions by reducing weight. Due to governmental regulations to reduce the environmental impact and to reduce waste, the need for remanufacturing CFRP is becoming an interesting area of application with economic benefits to industry. This is important as manufacturing carbon fiber is a costly process and remanufacturing CFRP is more cost effective and reduces the dependency on virgin materials. Processing CFRP to meet demands, for fast and high-quality cuts, can impose problems for conventional methods. The use of multi-pass scanning technique in laser cutting CFRP is investigated using a 1.5 kW fiber laser with assist gas pressure of 16 bar and gas flow rate of 126 lt/min. Using multi-pass technique, a through cut can be obtained by repeating the beam travel more than once. The advantage of laser cutting when compared with traditional CNC, is the low cost of maintenance over time due to the non-contact nature of the process i.e. no wear of tool at contact area. And due to the small beam spot size of the laser small and complex shapes can be cut. The aim of the paper is to determine how the process performs in terms of cutting speed and fiber damage. Average power was used to carried out experimental tests. A fiber damage below 100 µm with laser cutting speed of 2.5 m/min and above was obtained. Thermal effects were analyzed using scanning electron microscope (SEM) and optical microscope (OM). The fiber damage was further optimized using specialist methods such as double aperture nozzle and trenching. The use of trenching and double aperture further reduces the fiber damage to 10 µm and 50 µm, respectively with laser cutting speed of 7.5 m/min and 3.33 m/min.

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Section: Research Justificationmentioning

confidence: 99%

Laser cutting of carbon fiber reinforced plastic components for remanufacturing

et al. 2022

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“…Li et al [56] used an IPG YLS-5000 laser to drill 2 mm-thick CFRP plates, and three scanning speeds were set, namely 500 mm per minute, 800 mm per minute, and 1100 mm per minute. The results showed that the corresponding heat-affected zones were 17.5 mm 2 , 11 mm 2 , and 9 mm 2 respectively.…”

Section: Scanning Speedmentioning

confidence: 99%

Research progress on the quality and efficiency of carbon fiber reinforced thermoplastic polymer composites processed by laser

et al. 2022

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Carbon fiber reinforced plastics (CFRP) has been widely used in aerospace, military weapons, new energy and high-end vehicles due to its specific and superior strength, low density and long-lasting wear resistance. The processing of CFRP is very different from the traditional metal processing because of its heterogeneous structure, anisotropy and superior wear resistance of CFRP. Usually, CFRP has often various defects in mechanical processing and water jet processing, such as interlayer tearing, fiber pull-out, delamination, tool wear, and abrasive penetration. Through laser processing, the problems of CFRP materials existing in mechanical processing can be overcome. However, due to the huge differences in thermal physical properties such as thermal conductivity and vaporization temperature of carbon fiber and resin in CFRP, its laser processing also turns out to have some issues, such as heat-affected zone and fiber end expansion. This paper summarizes the research results of CFRP laser processing in China and internationally. Research progress was introduced in detail from various aspects including laser and material mechanism as well as laser processing parameters. It reports the experimental and theoretical studies covering the process accuracy in edge quality and the thermal characteristics in terms of heat-affected zone. Eliminating the heat-affected zone in the polymer matrix are considered the major obstacles of CFRP industrial applications. The methods of improving processing efficiency by increasing material removal rate and reducing processing time were reviewed. The influence of different thermal conductivity of carbon fiber and resin matrix in CFRP on the processing quality was discussed. Finally, the development trend and challenges of thermal conductivity of carbon fiber and resin in CFRP in theoretical modeling were proposed.

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“…First, P and v are selected as the control variables, and the distance between two laser pulses and pulse energy are, respectively, introduced as S and E. The physical meaning of S is described by equation (1), and E is described by equation (2). Then, on the premise of certain pulse frequence (25 kHz), the average power in the range of 5-20 W and the scan speed in the range of 100-2000 mm/s were selected to ablate the CFRP.…”

Section: Experiments Setupmentioning

confidence: 99%

“…As one of the thermoplastic materials, carbon fiber reinforced composite (e.g., carbon fiber reinforced plastic (CFRP)) is more and more widely used because of its superior properties such as large specific modulus and high specific strength, 1 including automotive panels and aircraft wing components, and the connection depends on the quality of the machined hole. 2 Traditional processing of CFRP will lead to excessive tool wear, material delamination, burr, and tear, while laser processing is a noncontact process, which does not involve any mechanical cutting force and tool degradation, and has a high degree of automation, so laser processing technology is a development prospect process of CFRP. 3 However, due to the difference of material properties between carbon fiber and epoxy resin at high temperature, the heat-affected zone (HAZ) formed around the laser scanning area seriously affects the processing quality.…”

Section: Introductionmentioning

confidence: 99%

Study on the mechanism of inhomogeneous microdamage in short-pulse laser processing of carbon fiber reinforced plastic

et al. 2021

Journal of Reinforced Plastics and Composites

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In this article, a micro-heterogeneous material simulation model with carbon fiber and resin phase about laser ablation on carbon fiber reinforced plastic (CFRP) is established by Ansys. The ablation process of CFRP by nanosecond ultraviolet laser is simulated, and the mechanism of pulse energy and spot spacing on the heat-affected zone (HAZ) is studied, then the process parameters are optimized with the goal of HAZ size and processing efficiency, and finally the validity of the model is verified by experiments. It is found that the residual gradient and the width of the radial HAZ increase with the increase of the spot spacing, and the width of the axial HAZ decreases slightly with the increase of the spot spacing, which indicates the existence of the optimal spot spacing. Second, the ablation depth increases with the increase of the pulse energy, and the carbon fiber retains a relatively complete degree of exposure when the pulse energy is low, which has a certain guiding significance for the cleaning and bonding of CFRP.

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Fiber laser cutting of CFRP laminates with single- and multi-pass strategy: A feasibility study

Cited by 54 publications

References 25 publications

Laser cutting of carbon fiber reinforced plastic components for remanufacturing

Laser cutting of carbon fiber reinforced plastic components for remanufacturing

Research progress on the quality and efficiency of carbon fiber reinforced thermoplastic polymer composites processed by laser

Study on the mechanism of inhomogeneous microdamage in short-pulse laser processing of carbon fiber reinforced plastic

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