Dimensionamento de um Sistema Robotizado para a Soldagem pelo Processo Friction Stir Welding

Cota, Bruno Silva; Bracarense, Alexandre Queiróz; Coelho, Fagner Guilherme Ferreira

doi:10.1590/0104-9224/si2204.07

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…The working area of manipulators can be represented as a three-dimensional working area. Now the robots is a very effective way to manufacturing parts of aerospace constructions [13][14][15][16][17][18]. However, in addition to geometrical problem, can be solved and thermic, stresses, quality's problem [19][20][21][22][23][24].…”

Section: Overview Of Friction Stir Welding Equipmentmentioning

confidence: 99%

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Mathematical Simulating of the Process of Friction Stir Welding for the Manufacture of Tank Bottoms in Aerospace Construction

2020

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In modern aerospace technology, one of the perspective ways of assembly parts of thin metal plates is friction stir welding. The advantage of this method is the higher strength of the welds of aluminum alloy joints, compared with the traditional MIG welding for the assembly of rockets and space constructions. However, the lack of friction stir welding is a necessity of formation of the system “machine –tool - part” significantly more effort, which is caused by the need to stir the material in the weld zone in a plastic state. Friction stir welding is used to connect the individual elements of tanks and bodies, in particular, panels, elements of the bottoms with each other. In this paper, is consider the typical design for rocket and space technology bottoms of large tanks. For industrial robot equipped with a special head for friction welding with mixing, a mathematical model of obtaining a spherical bottom from individual segments is proposed. The paper presents a mathematical model describing the geometry of a spherical bottom with a flap articulation and a working zone of an industrial robot, which allows defining constraints on process operation continuous seam welding for standard designs of bottoms and hulls of rocket and space technology. The dependences allowing determining the initial position of the robot relative to the bottom for performing friction stir welding of the continuous seam are proposed.

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Section: Overview Of Friction Stir Welding Equipmentmentioning

confidence: 99%

“…However, in addition to geometrical problem, can be solved and thermic, stresses, quality's problem [19][20][21][22][23][24]. For solve this problem used simulation for friction stir welding in various representation [8,9,13,25].…”

Section: Overview Of Friction Stir Welding Equipmentmentioning

confidence: 99%

Mathematical Simulating of the Process of Friction Stir Welding for the Manufacture of Tank Bottoms in Aerospace Construction

2020

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“…Para este projeto, foi usado o sistema robótico dimensionado por Cota et al [13] para a soldagem de materiais com elevado ponto de fusão pelo processo Friction Stir Welding. A montagem experimental realizada é apresentada na Figura 3, em que é possível verificar o robô antropomórfico COMAU SMART NJ500 de 6 graus de liberdade (A) que foi usado para a adaptação do sistema de soldagem projetado (B).…”

Section: Realização Do Processo De Soldagem Experimental 221 Equipunclassified

“…Para fazer o controle da rotação do sistema de soldagem foi utilizado um inversor de frequência com capacidade de acionamento de motores de até 50 cv. [13]. 251/263…”

Section: Realização Do Processo De Soldagem Experimental 221 Equipunclassified

Predição da Distribuição de Temperatura em Juntas da Liga de Alumínio 5052 H34 Soldadas pelo Processo Friction Stir Welding

et al. 2018

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Resumo O processo Friction Stir Welding (FSW) tem sido motivo de intensa pesquisa e tem ganhado relevância no setor produtivo devido às suas vantagens técnicas e econômicas. Inicialmente utilizado pela indústria automotiva e aeroespacial, o processo passou de uma simples técnica de soldagem de chapas finas de ligas de alumínio para um processo adaptável de grande utilização na união de ligas de metais leves, titânio, aço e outros metais duros de pequenas espessuras. Os modelos virtuais são os mais indicados na fase inicial de projetos industriais por minimizarem perdas, tais como: material, mão de obra e tempo. Sendo assim, tem-se como objetivo deste trabalho validar o modelo de soldagem pelo processo de FSW, disponível no software comercial Altair®, definindo as condições iniciais e de contorno de modo a representar o cenário testado. As histórias térmicas derivadas da simulação foram comparadas com os resultados dos ciclos térmicos medidos durante a soldagem de chapas finas, por meio de uma análise estatística dos resultados e desvios relativos. Foram encontrados valores de 0,9311 e 0,9546 para o coeficiente R2 para o lado de avanço e retrocesso respectivamente, o que evidenciou uma boa concordância entre resultados computados e suas contrapartes experimentais.

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Analysis of typical working conditions and experimental research of friction stir welding robot for aerospace applications

Luo

Tang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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In an attempt to address the limitations of single function and the poor process flexibility of existing friction stir welding equipment, a new friction stir welding robot has been developed to address practical problems in three-dimensional surface welding. Based on an analysis of the components of the robotic system, a kinematics model was established, and the forward and backward kinematics solutions were derived for the robot. An iterative nearest point algorithm, iterative closest point based on point cloud matching, was used to plan the welding trajectory for the most complex petal welding conditions, and an experimental study was conducted. The results show that the kinematic and dynamic test results were consistent with the acquired simulation curves for specific sizes of the rocket cap flaps under appropriate welding conditions. The normal error of the weld was less than 85 µm, the average tensile strength was 359 MPa, and the elongation was 7.20%, 78.0%, and 72.0% of 2A14-T6 aluminum alloy. The friction stir welding robot exhibited robust performance, and the proposed trajectory planning method is practical and effective. The appearance, geometric dimension, and mechanical properties of the weld achieved the expected criteria, and high-precision welding of large complex thin-walled surfaces is possible.

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Dimensionamento de um Sistema Robotizado para a Soldagem pelo Processo Friction Stir Welding

Cited by 4 publications

References 9 publications

Mathematical Simulating of the Process of Friction Stir Welding for the Manufacture of Tank Bottoms in Aerospace Construction

Mathematical Simulating of the Process of Friction Stir Welding for the Manufacture of Tank Bottoms in Aerospace Construction

Predição da Distribuição de Temperatura em Juntas da Liga de Alumínio 5052 H34 Soldadas pelo Processo Friction Stir Welding

Analysis of typical working conditions and experimental research of friction stir welding robot for aerospace applications

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