A Perspective View of the MODCON System
In this paper, a system of computer programs for the geometric description of hot forgings is outlined. The system is known as the MODCON system which stands for MODular CONstruction. The MODCON system allows quite complex forging shapes to be produced from relatively few input instructions. The forging geometry is defined as a series of volumetric modules which are then merged together during generation of the N.C. tape necessary to machine the finishing-cut EDM electrode for the whole forging cavity. The system can also be used for the roughing cut of the EDM electrode before the finishing cut stage as well as for generating cross-sectional data which serves as input to subsequent preform design systems. The system represents a considerable saving in time and cost over current methods involving conventional pattern making for the copy milling of electrodes.
Low Cost CAD/CAM System for Machine Parts
A CAD/CAM system known as the MODCON(1,2,3) has shown to be useful for producing machine parts such as rocker-lever, connecting-rods, etc. In spite of the usefulness of the MODCON system, it suffers the inherent disadvantage of a batch system and therefore does not interact with a MODCON user wishing to design a machine part. An interactive CAD/CAM system is now proposed which is conceptually similar to the MODCON system. The proposed system is implemented on a microprocessors based machine which includes a central processor, a numerical data processor and another processor for I/O. This low-cost/high-power machine enables a designer to interactively design a machine part to his satisfaction before a N.C. paper tape is produced for manufacturing purpose.
Composite monolayer fabrication by an arc-spray process
A single layer (monotape) technique for fabricating complex high-temperature tungsten-fiber-reinforced superalloy composites is proposed. The fabrication of sheets of arc-sprayed monotape 38 cm wide and 122 cm long has been demonstrated. Composites fabricated using the method are shown to have equal tensile strength and a cleaner matrix than composites fabricated from powder metal cloth monotapes, and the present technique is less expensive than the powder metal fabrication techniques.