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Experimental study on formability of phosphor bronze thin sheet in micro bead forming process

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Abstract

This study analyzed the effects of geometric size and grain size on the forming characteristics of a phosphor bronze thin sheet during micro bead forming processes. Specimens with different thicknesses were first heated at various temperatures for obtaining objective grain sizes. A tensile test was conducted to determine the mechanical properties of the specimens. A bead forming machine was used to conduct a bead forming test to measure and analyze curled angles, springback, and forming load; the measurement and analysis were conducted for investigating the geometric size and grain size effects in addition to the chamfer and lubrication effects during bead forming. The geometric size effect showed that the springback decreased with the thickness decreasing, and the grain size effect indicated that the springback increased with an increase in the grain size. Incorporating chamfers into the specimens enabled the specimens to be curled effectively, thus rendering chamfers the essential parameters for ensuring successful bead forming.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Taipei Chengshih University of Science and Technology, No. 2, Xueyuan Rd., Beitou, 112, Taipei, Taiwan, Republic of China

    Chang-Cheng Chen

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  1. Chang-Cheng Chen
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Correspondence to Chang-Cheng Chen.

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Chen, CC. Experimental study on formability of phosphor bronze thin sheet in micro bead forming process. Int J Adv Manuf Technol 84, 1897–1905 (2016). https://doi.org/10.1007/s00170-015-7860-1

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  • DOI: https://doi.org/10.1007/s00170-015-7860-1

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