Numerical Study on Single Point Incremental Sheet Metal Forming Process
-Single Point Incremental Sheet Forming (SPIF) is an innovative forming approach for sheet materials. In this process, the forming tool is moved along a predefined tool path which is a series of contour constructed a final shape of product by using numerical controlled technology. This paper investigated finite element analysis simulation to predict the mechanical failures in single point incremental sheet metal forming (SPIF). In the present paper, some of these aspects, namely, the phenomenon of the wall thickness overstretch along depth and the effect of the tool path on the distribution of the wall thickness using finite element simulations etc. are investigated. It is observed from the analysis that the single point incremental sheet metal forming is very much time consuming and also the depth of stretch with different step size and tool diameters have been implemented.
Evaluation of the maximum slope angle of simple geometries carried out by incremental forming process
Abstract The aim of this study is the evaluation of the maximum slope angle of frustums of pyramid and cone carried out by incremental forming and the validation of a FE code in order to have an instrument able to evaluate the limits of the process as regards to the geometry of the manufacturing product. In the specific case, afterwards the mechanical characterization and the evaluation of the sheets formability, frustums of pyramid and cone, with different slope angles, have been carried out, up to the appearance of fractures in the sheet. A FE analysis of the process has allowed to highlight the sheet zones characterized by different strains and to locate the critical points by the interpretation of the forming limit diagrams.
Development of incremental deep drawing process
This paper deals with development of an incremental deep drawing process. On a newly developed incremental deep drawing set-up, the aluminium sheets are formed; the forming is carried out by deep-drawing the blank as in the conventional method but incrementally. Fractures at the punch or die corner in the blank may or may not occur depending on the conditions; the process parameters involved are punch size, punch corner radius, increment in punch displacement, blank holding force or pressure, etc. It is thus shown that different shapes are formed by one set of common tools. It is thereby confirmed that incremental deep drawing is possible without using a particular tool set for a particular shape.