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.
Fundamental studies on the incremental sheet metal forming technique
Abstract The idea of incremental forming technique has been investigated for production of sheet metal components. With this technique, the forming limit curve (FLC) appears in a different pattern, revealing an enhanced formability, compared to conventional forming techniques. In the present study, the formability of an aluminum sheet under various forming conditions was assessed and difficult-to-form shapes were produced with the technique. By utilizing knowledge and experience obtained during the present study, it became possible to produce some free surfaces.
The Effect of the Punch Radius in Dieless Incremental Forming
Publisher Summary The dieless incremental forming process is an innovative sheet metal working technology where a considerable amount of knowledge and intelligence is required, in order to obtain accurate and efficient operations. In conventional forming process, the final shape is mostly determined by the die shape. In dieless incremental forming, however, the final shape must be predicted and controlled only by means of a proper process design. For this reason, several issues of this process must still be investigated on a scientific base. This chapter discusses the dieless forming process as an aid towards an intelligent process planning. In most sheet metal incremental forming processes (shear spinning, flow forming, and dieless forming), the deformation occurs by pure shear. The main process parameters are the feed rate, the part conicity, and the punch radius r. Formability in incremental forming has been often investigated and it is well recognized that severe strain may occur before fracture. Thinning and fracture largely depend on the part conicity. Besides, decreasing the feed rate has a positive effect. On the contrary, the effect of the punch radius r has been seldom explored in quantitative terms. The chapter investigates the effect of r on the formability of thin sheet metals, when plastically deformed by incremental forming.