Abstract
Curved profiles/sections have been widely used for manufacturing lightweight structures with high stiffness and strength due to aerodynamics, structural properties, and design reasons. Structural components fabricated using curved aluminum profiles satisfy the increasing demands for products used in many high-technology industries such as aerospace, shipbuilding, high-speed rail train, and automobile, which possess the characteristics of lightweight, high strength/stiffness relative to weight, superior aerodynamics performance, and aesthetics. In this paper, the advances and trends in forming techniques of curved extrusion profiles of metal alloys have been reviewed. The curved profile forming techniques are classified into three major categories: conventional cold bending technique, stress/moment superposed cold bending technique, and extrusion-bending integrated forming technique. Processes for innovative development in the field of forming curved profiles are identified; the extrusion-bending integrated technique which can directly form the billets into curved profiles by one single extrusion operation possesses the full potential for further innovation. Due to the nature of the research to date, much of the work referred to relates to hollow circular and rectangular tube cross-sections.
Highlights
Due to the world-wide demand for sustainable development, production of space and land vehicles with less fuel/energy consumption and CO2 emissions is a key aspect that needs to be solved in the Twenty-First century
Profiles used in structures of aircraft, ship, high-speed rail train, and automobile contribute to decreasing the weight of structural components and reducing fuel consumption and CO2 emissions
Lightweight extrusion profiles of aluminum and magnesium alloys with wall thicknesses from 0.25 mm produced by the company MIFA have been used to meet all the requirements set by the aerospace industry [3]
Summary
Due to the world-wide demand for sustainable development, production of space and land vehicles with less fuel/energy consumption and CO2 emissions is a key aspect that needs to be solved in the Twenty-First century. Lightweight design strategies are effective ways to contribute to environmentally friendly manufacturing of products with low energy consumption, and the need to develop and manufacture lightweight structural components is apparent. The application of extrusion profiles/sections for stiff and lightweight design has been widespread. Due to their high strength/stiffness relative to weight, profiles have been used widely for structural applications in designs of all types of vehicles. Profiles used in structures of aircraft, ship, high-speed rail train, and automobile contribute to decreasing the weight of structural components and reducing fuel consumption and CO2 emissions.
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