ISO 24213:2017 金属材料—シートとストリップ—ストレッチベンディングにおけるスプリングバック評価の方法 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 2, Ductility testing.

This second edition cancels and replaces the first edition (ISO 24213:2008), which has been technically revised.

The main changes compared to the previous edition are:

• the Normative references has been updated;
• Clause 7 c) and Clause 9 a) have been revised to specify the test piece more clearly;
• In Figure 2 b), a label to the test piece has been added;
• Clause 8 d) has been revised because the use of dial gauge is one of the methods for determining the radius of curvature;
• the Bibliography has been updated.

Introduction

This document has been established to evaluate the amount of springback occurring in metallic sheets deformed by stretch bending. It may be used for specifying a material, directly controlling a forming operation, designing dies, or calibrating finite element programs.

In metallic sheet forming processes, the geometry of the formed parts may deviate from the design geometry after the parts are removed from the dies due to elastic recovery. This phenomenon is referred to as springback.

1 Scope

This document specifies a method for evaluating the amount of springback of sheets of metallic materials known to exhibit large amounts of springback subjected to plane-strain stretch bending, which is a typical deformation mode generated in press-formed panels. By using this method, the amount of springback under stretch bending is evaluated accurately and quantitatively^[1][2].

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography