In this paper, an analytical method for noncircular shape extrusion is presented. Using this method, non-linear deformation field can be described with Hermit cubic spline which is prescribed by the boundary conditions of the die at its entryand exit. The upper bound method has been used to obtain optimum coefficient of the tangential boundary conditions. The results show that the optimum tange...

in forging design the significant parameters are maximum load or energy which are required for the selection of forging press or hammer. these two parameters are varied by the other paramelers such as the geometry of die cavity, flash dimensions, shape of the work piece, friction, mechanical properties of the metal to be forged, temperature, strain rate, and number of the forging operation. the...

class Entity3D int id; // Typweise eindeutige ID Vertex[] vert; // Liste adjazenter bzw. enthaltener Vertices Edge[] edge; // Liste adjazenter bzw. enthaltener Kanten Face[] face; // Liste adjazenter bzw. enthaltener Facetten Code-Beispiel 2.1 Die Klasse Object3D erweitert Entity3D lediglich um ein Feld box, das einen Verweis auf die Bounding-Box (B-Box) des Objekts enthält: class Object3D exte...

Beim Testen kommt der Wahl der Testfälle eine entscheidende Bedeutung zu, denn mit der Festlegung der Testfälle wird über die Chancen zur Fehlerentdeckung entschieden. Viele Untersuchungen gehen der Frage nach, ob beim Black-Box-Test oder beim Glass-Box-Test effektivere Testfälle entstehen. Heute ist sich die Literatur weitgehend einig, dass die beiden Testverfahren keine Alternativen bilden, s...

Many techniques have been developed in computer vision to recover three-dimensional shape from two-dimensional images. These techniques impose various combinations of assumptions/restrictions of conditions to produce a representation of shape (e.g. a depth/height map). Although great progress has been made it is a problem which remains far from solved, with most methods requiring a non-passive ...

Fullering process is a type of open die forging. In this research, elongation and maximum sideways spread in final shape of a billet after the first blow of a fullering process are predicted by designing a back propagation multilayer perceptron neural network. Several experiments are conducted using lead as the model material. Billets with three different square cross-sections are used in these...

in recent years, the hydroforming due to reduction in weight and increase in strength of automotive parts has attracted attention of the automotive industry. thus, the knowledge of the process to produce parts with desired quality and accuracy has been growing. one of the effective methods in improving the formability in the hydroforming is known as pulsating hydroforming. however, the reason o...

this paper presents a hybrid method for the optimization of forging process of an aerofoil blade. preform shape and die parting-line angle are optimized in order to minimize the volume of the unfilled die cavity, material waste, forging forces. the overall optimization scheme used in this research work includes a multi-objective approach that is combination of response surface and finite elemen...