Innovation by forming technology: motivation for research

Brosius, Alexander; Hermes, Matthias; Khalifa, Nooman Ben; Trompeter, Michael; Tekkaya, A. Erman

doi:10.1007/s12289-009-0656-9

Cited by 26 publications

(13 citation statements)

References 11 publications

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“…The profile bending radius depends on the geometrical position of the experimental setup, including the distance x between the guiding tool and the die, the distance z between the position of the guiding tool and the press axis, and the changed angle δ for the axis of the guiding tool. The curvature is generated at the die orifice where the material has a high temperature (for hot extrusion) and a relatively low flow stress so that small forces are needed to locate the guiding tool; therefore, this forming process can reduce the cross-sectional distortion and residual stresses [ 77 , 78 ]. It should be noted that press geometry determines minimum radius obtainable since curvature begins within the die orifice, and the profile can collide with the backup plate when the bending radius is small.…”

Section: Extrusion-bending Integrated Forming Methodsmentioning

confidence: 99%

Advances and Trends in Forming Curved Extrusion Profiles

Zhou

Shao

et al. 2021

Materials

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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.

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Section: Extrusion-bending Integrated Forming Methodsmentioning

confidence: 99%

Advances and Trends in Forming Curved Extrusion Profiles

Zhou

Shao

et al. 2021

Materials

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“…The research on SPIF of polymers has been directed towards the development of strategies for selecting the most appropriate polymers for SPIF [ 12 ], taking into account the ductility of the polymer and the required level of geometrical part accuracy, and for selecting the optimal parameters for the SPIF process. Some of the early work generated in this context was reported by Martins et al [ 11 ], who made the first attempt towards the development of criteria for the selection of polymers that are suitable for SPIF by testing five different polymers: polyoxymethylene (POM), polyethylene (PE), polyamide (PA), polyvinylchloride (PVC), and polycarbonate (PC).…”

Section: Introductionmentioning

confidence: 99%

Single-Point Incremental Forming of Two Biocompatible Polymers: An Insight into Their Thermal and Structural Properties

et al. 2018

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Sheets of polycaprolactone (PCL) and ultra-high molecular weight polyethylene (UHMWPE) were fabricated and shaped by the Single-Point Incremental Forming process (SPIF). The performance of these biocompatible polymers in SPIF was assessed through the variation of four main parameters: the diameter of the forming tool, the spindle speed, the feed rate, and the step size based on a Box–Behnken design of experiments of four variables and three levels. The design of experiments allowed us to identify the parameters that most affect the forming of PCL and UHMWPE. The study was completed by means of a deep characterization of the thermal and structural properties of both polymers. These properties were correlated to the performance of the polymers observed in SPIF, and it was found that the polymer chains are oriented as a consequence of the SPIF processing. Moreover, by X-ray diffraction it was proved that polymer chains behave differently on each surface of the fabricated parts, since the chains on the surface in contact with the forming tool are oriented horizontally, while on the opposite surface they are oriented in the vertical direction. The unit cell of UHMWPE is distorted, passing from an orthorhombic cell to a monoclinic due to the slippage between crystallites. This slippage between crystallites was observed in both PCL and UHMWPE, and was identified as an alpha star thermal transition located in the rubbery region between the glass transition and the melting point of each polymer.

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“…Reuse strategy for sheet metal components, very little scientific research has been developed so far. Brosius et al [4] in a review paper describe how a demounted automotive engine-hood can be reshaped into a rectangular sheet metal component by sheet hydroforming process. Takano et al [5] applied Single Point Incremental Forming (SPIF) on a flattened sheet.…”

Section: /1mentioning

confidence: 99%

Understanding formability and geometrical accuracy of SPIF process used as Reshaping approach

Zaheer¹,

Ingarao²,

Lorenzo³

et al. 2021

Esaform 2021

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Putting in place Circular Economy strategies is an urgent action to be undertaken. Manufacturing processes play a relevant role as efficient material reuse enabler. Scientists have to make an effort either to find new process or to rethink old process to reprocess End-of-life (EoL) components to recover both material and functions. In this paper, Single Point Incremental Forming (SPIF) process is used for reshaping sheet metal EoL components. Deep drawing process as well as uniaxial pre-straining (to imitate the End-of-Life component) followed by SPIF operations (to obtain the reshaped components) are set- up and implemented to form and reform aluminum sheet metal components. As the authors have already proved the technical feasibility of such an approach, the present paper aims at a better understanding of the formability and geometrical accuracy performance of SPIF process as used to reform components. Specifically, an experimental campaign varying kind and extent of restraining is developed and the formability and geometrical accuracy of the subsequent SIPF operations is analyzed. Results proves that SPIF process is a promising approach for reshaping purpose.

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Innovation by forming technology: motivation for research

Cited by 26 publications

References 11 publications

Advances and Trends in Forming Curved Extrusion Profiles

Advances and Trends in Forming Curved Extrusion Profiles

Single-Point Incremental Forming of Two Biocompatible Polymers: An Insight into Their Thermal and Structural Properties

Understanding formability and geometrical accuracy of SPIF process used as Reshaping approach

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