Aperfeiçoamento da técnica de Soldagem Pontual por Fricção (FSpW) para união de poliamida 6 e laminado de poliamida 66 com fibra de carbono

Gonçalves, Joel; Santos, Jorge F. dos; Canto, Leonardo Bresciani; Filho, Sergio de Traglia Amancio

doi:10.1590/s0104-92242014000100004

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…The feasibility of the joining of unreinforced polymers by RFSSW was demonstrated by Oliveira et al [66] in 2010, who successfully welded PMMA plates. The dissimilar joining of unreinforced polymers and FRTP composites by RFSSW was reported in 2014 by Gonçalves et al [67,68]. One year later, by successfully joining CF reinforced PA66 laminate plates, Gonçalves et al [69] demonstrated the joining of FRTP composites by RFSSW.…”

Section: Introductionmentioning

confidence: 94%

Joining of Fibre-Reinforced Thermoplastic Polymer Composites by Friction Stir Welding—A Review

et al. 2022

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The objective of the current work is to show the potential of the friction stir welding (FSW) and its variants to join fibre-reinforced thermoplastic polymer (FRTP) composites. To accomplish that, the FSW technique and two other important variants, the friction stir spot welding (FSSW) and the refill friction stir spot welding (RFSSW), are presented and explained in a brief but complete way. Since the joining of FRTP composites by FSSW has not yet been demonstrated, the literature review will be focused on the FSW and RFSSW techniques. In each review, the welding conditions and parameters studied by the different authors are presented and discussed, as well as the most important conclusions taken from them. About FSW, it can be concluded that the rotational speed and the welding speed have great influence on heat generation, mixture quality, and fibre fragmentation degree, while the tilt angle only has residual influence on the process. The reduction of internal and external defects can be achieved by adjusting axial force and plunge depth. Threaded or grooved conical pins achieved better results than other geometries. Stationary shoulder tools showed better performance than conventional tools. Regarding the RFSSW, it has not yet been possible to deepen conclusions about most of the welding parameters, but its feasibility is demonstrated.

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Section: Introductionmentioning

confidence: 94%

Joining of Fibre-Reinforced Thermoplastic Polymer Composites by Friction Stir Welding—A Review

et al. 2022

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“…Campanelli et al [9] reportaram em seu estudo a otimização dos parâmetros de processo considerando a resistência ao cisalhamento de chapas da liga de magnésio AZ31 com 2 mm de espessura. No campo de união de materiais poliméricos, Gonçalves et al [10] estudaram a otimização dos parâmetros de processo envolvidos na soldagem a ponto por fricção de chapa de poliamida 6 e laminado de poliamida 66 com fibra de carbono. No entanto, não é do nosso conhecimento a publicação de nenhum trabalho anterior relacionado com a otimização de parâmetros de processo para a soldagem a ponto por fricção de chapas finas de ligas de alumínio para aplicação aeronáutica até o presente momento.…”

Section: /401unclassified

Estudo dos Parâmetros do Processo de Soldagem a Ponto por Fricção de Chapa Fina da Liga de Alumínio AA2198-T8

et al. 2018

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado.Recebido: 31 Ago.Resumo: O presente trabalho consiste na investigação dos parâmetros de soldagem a ponto por fricção (FSpW) -velocidade de rotação (VR), tempo de soldagem (TS) e profundidade de penetração (PP) -de chapas de AA2198-T8 com 1,6 mm de espessura. O estudo foi realizado com base em ensaios mecânicos de cisalhamento das juntas sobrepostas soldadas nas condições indicadas pelo método Taguchi, visando à determinação da condição ótima de soldagem do ponto de vista de propriedades mecânicas e de processo. Os resultados obtidos indicaram que todas as condições de soldagem avaliadas excedem o limite de carga em cisalhamento mínimo requerido para aplicação aeronáutica. A análise também apontou que as variáveis VR e PP são responsáveis por quase 90% da variação da carga de cisalhamento das juntas, enquanto a contribuição do TS mostrou-se consideravelmente menos significativa. Por fim, a condição ótima de soldagem foi encontrada para os valores mais altos de VR e PP, considerando-se os intervalos dos parâmetros empregados no estudo. Palavras-chave:Soldagem a ponto por fricção; FSpW; AA2198-T8; método Taguchi.Abstract: This work features the investigation of the refill friction stir spot welding (RFSSW) parameters -rotational speed (RS), welding time (WT) and plunge depth (PD) -of AA2198-T8 1.6-mm thick sheets. The study was performed based on lap shear strength tests of overlapped joints welded under conditions indicated by the Taguchi method in order to determinate the optimized combination of parameters, considering the mechanical properties and process conditions. Results based on mechanical testing indicate that all the welding conditions evaluated in the current study exceed the minimum criterion for lap shear strength required for aeronautic applications. RS and PD have shown to be responsible altogether for almost 90% of the welds' lap shear strength variation, while TS presents considerable less significant contribution to the joints' resistance. The optimized welding condition was found for highest RS and PD levels and lowest TS.

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“…[9] Mechanical joining includes drilling holes and screwing bolts or rivets, resulting in stress concentration and weight increment. [11] Welding techniques, such as friction stir welding [12][13][14][15] friction spot welding [16][17][18] laser welding, [19] induction spot welding, [20] are alternatives owing to short welding time, high joint quality, and low energy consumption. Despite excellent application potential, sparked with its nontoxicity and outstanding mechanical properties, the low glass transition temperature (T g ) thermoplastic CF/epoxy remains an urgent issue in welding due to its sensitivity to welding heat.…”

Section: Introductionmentioning

confidence: 99%

High Pressure–Amplitude Ratio Ultrasonic Spot Welding of Thermoplastic Carbon Fiber‐Reinforced Epoxy

et al. 2021

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Thermoplastic carbon fiber‐reinforced epoxy has potential in the fields of aerospace, vehicle, and medical equipment, due to nontoxicity, adequate cost savings, and outstanding mechanical properties. Sensitivity to welding heat of the thermoplastic carbon fiber‐reinforced epoxy is an urgent issue due to the low glass transition temperature (T g). High pressure–amplitude ratio ultrasonic spot welding is used to join the low T g thermoplastic carbon fiber‐reinforced epoxy, which provided sufficient energy and pressure for suppressing the vibration and eliminating the stress relaxation to improve the stability of the material to welding heat. The molten area increased at the interface, whereas the entanglement of molecular chains was promoted under adequate pressure. The tensile shear force reached 4.6 kN with the welding pressure of 4.8 MPa, the amplitude of 44.1 μm and the welding time of 800 ms. The primary formation mechanism includes bonding of polymer, tangling of carbon fibers, and polymer, and strengthening between polymeric layers. The high pressure–amplitude ratio ultrasonic spot welding has the feasible and potential to join the low T g thermoplastic composites.

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Aperfeiçoamento da técnica de Soldagem Pontual por Fricção (FSpW) para união de poliamida 6 e laminado de poliamida 66 com fibra de carbono

Abstract: Resumo A Soldagem Pontual por Fricção ('Friction Spot Welding -FSpW') é uma técnica inovadora que foi desenvolvida e patenteada em 2005 pelo centro de pesquisa alemão Helmholtz Zentrum Geesthacht (HZG).

Cited by 6 publications

References 12 publications

Joining of Fibre-Reinforced Thermoplastic Polymer Composites by Friction Stir Welding—A Review

Joining of Fibre-Reinforced Thermoplastic Polymer Composites by Friction Stir Welding—A Review

Estudo dos Parâmetros do Processo de Soldagem a Ponto por Fricção de Chapa Fina da Liga de Alumínio AA2198-T8

High Pressure–Amplitude Ratio Ultrasonic Spot Welding of Thermoplastic Carbon Fiber‐Reinforced Epoxy

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