High-precision roll bending of titanium alloy wire for glasses

Yasushi Sekine, M. Asakawa, N. Kato, Y. Takebe, S. Matsuo, Y. Sasaki, M. Matsumura

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Although the frames of glasses are generally made of titanium alloy, achieving a given designed shape can be difficult because titanium alloy has a large springback. Actually, the production of the rims of these frames depends on the experience and skills of workers. We conducted an experiment and carried out FEM analysis to investigate an improved method for producing rims via high-precision roll bending. First, to investigate real rim production, we searched for a relationship between roll no. 8 intermesh h and lens curvature κy, and a relationship between intermesh h and rim curvature κz using the titanium alloy wire used for actual rim production. Second, we created an analytical model to clarify actual rim production. Based on a detailed examination of the manufacturing process using experimental and FEM analyses, we found that the wire was tilted by a twisting moment generated by the roll no. 8 intermesh. We considered the cause of moving contact point between wires and bending rolls generated by getting lens curvatures processing defects. Third, the distance between roll nos. 7 and 8 was changed to reduce deviations from the standard wire. Finally, we achieved a better bending process for producing high-precision rims for glasses.

    Original languageEnglish
    Title of host publicationConference Proceedings for the 83rd Annual Convention of the Wire Association International, Interwire 2013
    PublisherWire Association International Inc.
    Publication statusPublished - 2013
    Event83rd Annual Convention of the Wire Association International, Interwire 2013 - Atlanta, GA
    Duration: 2013 Apr 222013 Apr 25

    Other

    Other83rd Annual Convention of the Wire Association International, Interwire 2013
    CityAtlanta, GA
    Period13/4/2213/4/25

    Fingerprint

    Titanium alloys
    Wire
    Glass
    Lenses
    Finite element method
    Point contacts
    Analytical models
    Defects
    Processing
    Experiments

    Keywords

    • FEM analysis
    • Glass frame
    • Rim
    • Roll bending
    • Titanium alloy

    ASJC Scopus subject areas

    • Software

    Cite this

    Sekine, Y., Asakawa, M., Kato, N., Takebe, Y., Matsuo, S., Sasaki, Y., & Matsumura, M. (2013). High-precision roll bending of titanium alloy wire for glasses. In Conference Proceedings for the 83rd Annual Convention of the Wire Association International, Interwire 2013 Wire Association International Inc..

    High-precision roll bending of titanium alloy wire for glasses. / Sekine, Yasushi; Asakawa, M.; Kato, N.; Takebe, Y.; Matsuo, S.; Sasaki, Y.; Matsumura, M.

    Conference Proceedings for the 83rd Annual Convention of the Wire Association International, Interwire 2013. Wire Association International Inc., 2013.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Sekine, Y, Asakawa, M, Kato, N, Takebe, Y, Matsuo, S, Sasaki, Y & Matsumura, M 2013, High-precision roll bending of titanium alloy wire for glasses. in Conference Proceedings for the 83rd Annual Convention of the Wire Association International, Interwire 2013. Wire Association International Inc., 83rd Annual Convention of the Wire Association International, Interwire 2013, Atlanta, GA, 13/4/22.
    Sekine Y, Asakawa M, Kato N, Takebe Y, Matsuo S, Sasaki Y et al. High-precision roll bending of titanium alloy wire for glasses. In Conference Proceedings for the 83rd Annual Convention of the Wire Association International, Interwire 2013. Wire Association International Inc. 2013
    Sekine, Yasushi ; Asakawa, M. ; Kato, N. ; Takebe, Y. ; Matsuo, S. ; Sasaki, Y. ; Matsumura, M. / High-precision roll bending of titanium alloy wire for glasses. Conference Proceedings for the 83rd Annual Convention of the Wire Association International, Interwire 2013. Wire Association International Inc., 2013.
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    AU - Sasaki, Y.

    AU - Matsumura, M.

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    AB - Although the frames of glasses are generally made of titanium alloy, achieving a given designed shape can be difficult because titanium alloy has a large springback. Actually, the production of the rims of these frames depends on the experience and skills of workers. We conducted an experiment and carried out FEM analysis to investigate an improved method for producing rims via high-precision roll bending. First, to investigate real rim production, we searched for a relationship between roll no. 8 intermesh h and lens curvature κy, and a relationship between intermesh h and rim curvature κz using the titanium alloy wire used for actual rim production. Second, we created an analytical model to clarify actual rim production. Based on a detailed examination of the manufacturing process using experimental and FEM analyses, we found that the wire was tilted by a twisting moment generated by the roll no. 8 intermesh. We considered the cause of moving contact point between wires and bending rolls generated by getting lens curvatures processing defects. Third, the distance between roll nos. 7 and 8 was changed to reduce deviations from the standard wire. Finally, we achieved a better bending process for producing high-precision rims for glasses.

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