Design and validation of a fixture for positive incremental sheet forming

Siddiqi, Muftooh Ur Rehman and Corney, Jonathan R. and Sivaswamy, Giribaskar and Amir, Muhammad and Bhattacharya, Rahul (2018) Design and validation of a fixture for positive incremental sheet forming. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 232 (4). pp. 629-643. ISSN 2041-2975

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    Abstract

    Incremental sheet forming is an emerging manufacturing technique in which sheet metal is formed into desired shape through the application of localized force using a hemispherical tool. Potential advantages of the process are its relatively low cost and small lead times, and these have to be balanced against the disadvantages of low dimensional accuracy and a limited understanding of the process’ internal mechanics. Incremental sheet forming system can be classified as positive, or negative, depending on whether the sheet material is progressively deformed onto a protrusion or a cavity. In negative systems, the work piece is held on a static fixture; whereas, in positive incremental sheet forming, the fixture must be incrementally lowered onto a protruding die. Although the vertical movement of positive incremental sheet forming fixtures is easily illustrated schematically, its implementation is challenging; if the descent is actuated, the motion has to be carefully coordinated with those of the forming tool; if free sliding on vertical columns, the rig must move without jamming or rocking. This article reports the development and testing of a positive incremental sheet forming fixture design that uses nylon sleeve bushes. Symmetric and asymmetric components were formed using the designed fixture, modular wooden dies and a rotating tool with multiple diameters and the results are discussed.

    Author(s):Siddiqi, Muftooh Ur Rehman ORCID logoORCID: https://orcid.org/0000-0003-1179-2595, Corney, Jonathan R. ORCID logoORCID: https://orcid.org/0000-0003-1210-3827, Sivaswamy, Giribaskar, Amir, Muhammad and Bhattacharya, Rahul
    Item type:Article
    ID code:63698
    Keywords:fixture design, Incremental sheet forming, sheet strains, sheet thickness, Mechanical engineering and machinery, Mechanical Engineering, Industrial and Manufacturing Engineering
    Subjects:Technology > Mechanical engineering and machinery
    Department:Faculty of Engineering > Design, Manufacture and Engineering Management
    Strategic Research Themes > Innovation Entrepreneurship
    Depositing user: Pure Administrator
    Date deposited:12 Apr 2018 09:19
    Last modified:17 Jan 2020 20:00
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/63698
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