Download Direct Engineering: Toward Intelligent Manufacturing by G. Fredric Bolling (auth.), Ali K. Kamrani Ph.D., Peter R. PDF
By G. Fredric Bolling (auth.), Ali K. Kamrani Ph.D., Peter R. Sferro (eds.)
Direct Engineering (DE) is the production of a product improvement cycle right into a unmarried, unified strategy. The layout procedure in so much industries is an evolutionary one (i.e., incremental adjustments to a few present design). DE is a producing strategy that seeks to enhance the layout tactics via delivering whole archival documentation of current designs. It makes use of 3-dimensional geometric versions with built-in production details in the course of the layout method. DE reduces the layout cycle, and the diversity and variety of engineering alterations. This technique decreases the layout cycle time, raises productiveness, and gives the next caliber product.
the necessary applied sciences and methodologies that would help the advance of the DE setting are: (1) product illustration utilizing feature-based modeling; (2) knowledge-based purposes that would aid the total product improvement cycle; (3) an engineering surroundings applied round allotted computing and object-oriented platforms; (4) direct production ideas utilizing quick prototyping.
Direct Engineering: towards clever Manufacturing addresses the subsequent fresh subject matters with regards to the improvement, implementation, and integration of the DE atmosphere: (1) the present scope of the examine in clever production; (2) the result of the applied sciences and instruments built for built-in product and strategy designs, and (3) exam of the methodologies and algorithms used for the implementation of direct engineering.
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Extra info for Direct Engineering: Toward Intelligent Manufacturing
The boundary of V is a subset of the distributed union Uf=1 ( Csub ); of the n members of Csub ~ C . ~ , .. ,FMS) ofa semi-analytic total feature volume VT" Proposition 2 (completeness) Given a total feature volume VT with maximal simple feature set (FMS1 , . ,FMS): VT = n UFMS;· ;=) Figure 10 shows the maximal simple features of the sample part from Figure 2. Figure 10. Maximal simple features of the example extended feature volume While a maximal simple feature can be defmed exclusively in terms of connected extensions, it is useful to think of maximal simple features as groups of base volumes.
Constructing the labeled topology adjacency graph. Using the attributes defmed for faces and edges, a labeled topology adjacency graph (LTAG) is constructed for a given feature. , "top," "bottom"). Figure 12 illustrates the LTAGs for a BLIND HOLE, aTHROUGH HOLE and a BOSS feature. Figure 12. LTAGs of BLIND HOLE, THROUGH HOLE, and BOSS features 36 Direct Engineering: Toward Intelligent Manufacturing The feature LTAG is then compared for labeled face edge topology (LFET) LFET equivalence (written A = B) to a reference feature defmed in a reference hierarchy.
Machining). However, it is not true generally. ) renders this implicit assumption incorrect. Another volume that is encompasses both VF;, and Vr: is an "extended" feature volume, defmed as follows: S Definition 2 Let Vp be a part volume and Vs the stock volume from which Vp will be manufactured. The extended feature volume VFE is equal to the Boolean union of the stock volume and the part volume: A set of connected extensions calculated relative to VF. defmes any additive and subtractive features necessary to describe the manufactureEofthe part volume from the stock volume.