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

Giuseppe Ingarao,Livan Fratini,Omer Zaheer,Rosa Di Lorenzo

doi:10.25518/esaform21.4315

Abstract

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.

Highlights

Reducing anthropogenic environmental impact is an urgent issue to deal with
Α max decreases by 1° moving from the as received conditions up to the case with 15% of uniaxial pre-straining. These results prove that, a decrease in formability is visible, the change is very limited and the Single Point Incremental Forming (SPIF) process can still be successfully applied even after a significant amount of uniaxial pre-straining
Concerning the case with the DD used as primary process, no change in α max value was observed both in inward and in outwards case study. This can be explained considering that, in this case, the SPIF process is applied on zone characterized by a very limited degree of deformation, as a consequence the SPIF process can take advantage of the entire original material formability

Summary

Introduction

Reducing anthropogenic environmental impact is an urgent issue to deal with. One of the main contributors to yearly CO2 emissions is materials production, accounting for about 25% of the global CO2 emissions [1]. Product repair and upgradation, remanufacturing, component re-use and open/closed loop recycling are some of the strategies that could contribute towards reducing the environmental impact of raw material production [2]. As far as metals are concerned, recycling is still the most applied strategy as it provides environmental, technological and economic benefits. It is, urgent turning to more virtuous circular economy strategies, such us product/component reuse. Reuse strategies would allow functions recovery from EoL components In this scenario manufacturing scientists play a relevant role as they are called to think of new processes or to rethink conventional processes to be applied as circular economy enabler. Looking forming processes applied as Understanding formability and geometrical accuracy of SPIF process used as Reshaping ap

Objectives

Methods

Results

Conclusion