Superplastic forging process to the middle of a watch case and the analysis which made its process approximate a two-dimensional model

Manufacturing of wristwatch case when using stainless steel involves 13 different forging stages after the initial shearing out of the pre-form, shaving and cutting operations. These are illustrated in a series of photographs for stainless steel (SUS303) material. Authors have carried out a series o...

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Veröffentlicht in:Journal of Japan Institute of Light Metals 1999, Vol.49(8), pp.341-345
Hauptverfasser: KUBOKI, Isao, YOSHIDA, Kazunari
Format: Artikel
Sprache:eng ; jpn
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Zusammenfassung:Manufacturing of wristwatch case when using stainless steel involves 13 different forging stages after the initial shearing out of the pre-form, shaving and cutting operations. These are illustrated in a series of photographs for stainless steel (SUS303) material. Authors have carried out a series of FEM and computer simulation manufacturing of this product. For the purpose they consider the 2 dimensional form of the back plate, and in the past papers have reported axial symmetrical 2 dimensional form of back plate for which the FEM analysis is easy to conduct. In this report, they select the complex shape of front band of wristwatch and conduct 3D analysis for titanium alloy forging. For the purpose the specimen is 40% cold rolled to obtain beta -rich ( alpha + beta ) type of Ti-4.5% Al-3%V2%Mo-2%Fe alloy, using this alloy 4 types of experimental specimens are made and forged along with parallel FEM analysis for each that the photographs and analytical wire mesh images are compared on a stage by stage basis. Along with these the flash length of body drum section associated with stroke is plotted with projection and inside flash lengths are plotted.
ISSN:0451-5994
1880-8018
DOI:10.2464/jilm.49.341