Flexible and Incremental Sheet Metal Bulging using a Path-Controlled Spherical Roller
TLDR
In this paper, a flexible and incremental sheet metal bulging machine using a path-controlled spherical roller was developed for the small-batch manufacture of nonsymmetrical shallow shells, which performed a wide range of sheet metal shaping on complex shapes, for example, pyramidal shells, shells of the frustum of a pyramid, shallow pans and embossed panels.Abstract:
A flexible and incremental sheet metal bulging machine using a path-controlled spherical roller has been developed for the small-batch manufacture of nonsymmetrical shallow shells. The computer operations-controlled bulging machine performed a wide range of sheet metal shaping on complex shapes, for example, pyramidal shells, shells of the frustum of a pyramid, shallow pans and embossed panels. In order to predict the forming limit of incremental shaping, a new incremental bulging test by a ball punch was performed on an annealed aluminum sheet, and the experimental results showed that fracture occurred when the thickness strain reached n constant value. An approximate calculation method for the maximum bulging height of the shell was proposed, using this fracture limit and a geometrical deformation model. The predictions for the shell of the frustum of a quadrangular pyramid and the quadrangular pyramidal shell were in reasonably good agreement with experimental values for the annealed aluminum sheet.read more
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The technology of Incremental Sheet Forming¿A brief review of the history
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An approximate deformation analysis and FEM analysis for the incremental bulging of sheet metal using a spherical roller
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