Abstract

Single Point Incremental Forming (SPIF) is one of the main and most used variants of Incremental Sheet Forming (ISF), a flexible rapid prototyping technique in the sheet metal sector. In this paper, the effect of flat end tools on SPIF with variable wall angle geometry was studied under different process parameters. Experiments on AlMn1Mg1 sheets with 0.22 mm initial thickness are carried out by a CNC Milling Machine. Geometry measurements of the formed parts carried out on a coordinate measuring machine (CMM) are also presented.

Highlights

  • Single Point Incremental Forming (SPIF) is one of the most important types of Incremental Sheet Forming (ISF) due to the flexibility and capability to change the experimental parameters to achieve the desired shape

  • The main advantage of SPIF is the ability of rapid design by changing factors affecting the process, like sheet thickness, tool radius, tool speed, tool feed and type of lubricant used

  • McAnulty et al, mentioned that seven articles indicate that increasing tool diameter led to increasing the formability and ten articles proved the opposite of that, and six articles agreed to the fact that the best tool diameter had adjusted for the highest formability since all the tools were solid hemispherical [1]

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Summary

Introduction

Single Point Incremental Forming (SPIF) is one of the most important types of Incremental Sheet Forming (ISF) due to the flexibility and capability to change the experimental parameters to achieve the desired shape. The main advantage of SPIF is the ability of rapid design by changing factors affecting the process, like sheet thickness, tool radius, tool speed, tool feed and type of lubricant used. This makes SPIF one of the most important methods of manufacturing prototypes before starting mass production. There are three different types of forming tools that are used in SPIF; spherical, ball bearing in the concave cavity with free movement on the forming sheet surface and the flat end tool [1].

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