Incremental Forming of Titanium Grade 2 Sheet by TPIF-RL Method

Ömer Seçgi̇n,Ergün Nart,İbrahim Özsert

doi:10.30939/ijastech..999466

Abstract

TPIF-RL method is a new method that gives better wall thickness in incremental forming. In this method, the sheet is not fixed at the edges. Like the deep drawing process, it is compressed with a certain pressure. During the forming process, the sheet flows under the blankholder. Thus, more homogenous wall thickness is ob-tained.In this study, Titanium Grade 2 sheet is formed as a cone via TPIF-RL method. Optimum forming parameters were determined by Signal/Noise analysis. In addi-tion, finite element analysis of the process was performed. Using 2 bar clamping pressure, 1000 mm/min feedrate, 0.75 mm increment and 15 mm forming tool di-ameter optimum result was obtained. With these optimum parameters, 6% thin-ning occurs on sheet thickness. This new method ensures a homogeneous wall thickness distribution.

Highlights

One of the methods used in prototype production is incremental forming
Four different factors were examined as pressure, feedrate, increment and forming tool diameter [11,12,13,14]
A total of 18 experiments were performed by the TPIF-RL method

Summary

Introduction

One of the methods used in prototype production is incremental forming. In this method, the sheet is formed by applying local pressure. Since local pressure is applied, the sheet can be subjected to very large deformation. A large thickness change may occur in the sheet. This large change in wall thickness can reduce the industrial usability of the manufactured part [1]. Some researchers have reduced friction using different lubricants. The reduction of friction positively affected wall thickness [2,3,4]. Some researchers have reduced the negative effect of friction by coating the forming tool with different materials [5]

Methods

Results

Conclusion