ЭКСПЕРИМЕНТАЛЬНОЕ И ЧИСЛЕННОЕ ИССЛЕДОВАНИЕ СИЛ ПРИ ИНКРЕМЕНТАЛЬНОМ ФОРМОВАНИИ ТИТАНОВЫХ ЛИСТОВ

E.V Markova,A.R Ahmed,I.E Daba’Bneh,A.M Al Darabseh

doi:10.37313/1990-5378-2021-23-1-5-10

Abstract

Incremental forming is a rapid prototyping process that allows sheets to be formed without using forming tools, using a numerically controlled machine tool. A wide variety of shapes can be generated with this process. The objective of this work is to study through experimental tests and numerical simulations the behavior of ASTM grade 2 titanium during incremental point forming (SPIF). A Spinner MFG850 machining center from ISET in JENDOUBA coupled to a multi-component force sensor FN7325 was used for the forming of thin sheets by this process. As the diameter of the punch and its incremental movement are parameters having a direct effect on the forming force, tests with diameters of the punches dp varying between 10 and 15 mm and various paths made up of circular movements in the horizontal plane have been carried out experimentally. Numerical simulation is carried out in large elastoplastic deformations with ABAQUS/explicit. Comparisons of the evolution of the forming force for different values of the diameter of the punch dp and of the displacement step ∆zare carried out.

Highlights

Titanium’s properties, which are a combination of high strength, toughness, toughness, low density, and good corrosion resistance offered by various titanium alloys at low and high temperatures, allow for weight savings in space structures and other high-performance applications
The asymmetric incremental forming of AISF sheets can be divided into two forming modes depending on the number of contact points between the sheet and the tool
The most studied process and which is the subject of this work is the «SPIF: single point incremental forming» incremental forming

Summary

Introduction

Titanium’s properties, which are a combination of high strength, toughness, toughness, low density, and good corrosion resistance offered by various titanium alloys at low and high temperatures, allow for weight savings in space structures and other high-performance applications. A campaign of experimental tests was carried out by measuring the forming forces during the incremental forming operation. Especially aluminum-titanium alloys, are very attractive materials for this type of application due to their high resistance to weight ratio, as well as excellent mechanical properties.

Objectives

Results

Conclusion