Automatic flat pattern development of sheet metal components from orthographic projections |
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Authors: | M S Shunmugam T R Kannan |
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Affiliation: | 1. IRT Jules Verne, chemin du Chaffault, 44340 Bouguenais, France |
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Abstract: | Flat pattern development of sheet metal components is a prerequisite for sheet metal fabrication and it also facilitates development of process plans. Commercial softwares for flat pattern development are too expensive and they often require a 3-D model of the component. In fact, most of the component drawings exist as orthographic projections in the majority of industries. A system that can automatically generate a flat pattern using the orthographic projections as the input can be very useful. Such a system is proposed in this paper and it first extracts the features automatically from the orthographic projections and then generates the 3-D wireframe model of the central plane of the component. Using a variant of attributed adjacency graph, the data from the 3-D wireframe model are used for automatic flat pattern development incorporating bending allowances. |
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Keywords: | Sheet metal Orthographic projection Feature recognition Flat pattern development OpenGL 3-D model generation |
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