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BLANK SHAPE PREDICTION BASED ON FLATTENING APPROACH OF 3D COMPLEX SURFACES PRODUCED BY DIGITIZED DIES | ||
| Iraqi journal of mechanical and material engineering | ||
| Article 1, Volume 11, Issue 4, 2011, Pages 683-694 | ||
| Author | ||
| Wissam K.H.Sarraji | ||
| Abstract | ||
| Abstract One of the most important and well-known problems in sheet metal based industries is the blank design of complex 3D curved surfaces. Blank design determines both shape and size of the incipient blank. This paper introduces an inverse method for converting the given 3D curved surface of the product to its planar shape. The develped planar shape is based on changing the position of control points that determines the shape of the curved surface. The material is assumed to obey pure shear deformation mechanism to simplify the processing and to estimate the direction of motion of these control points. The devised method is a multi-step scheme to come up with the deformation steps of such surfaces. The blank thickness distribution was nominated as a process parameter to qualitatively judge the performance of the presented method using FEM technique. The results show that the presented method is a very subtle way in predicting the blank shape so that the thickness is evenly distributed across the predicted blank compared with conventional methods. The results also show that the presented method is a detour to simulate the deformation steps. | ||
| Keywords | ||
| Blank design; free; form surfaces; Digitized dies | ||
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