A Study of the Effects of Applying CAD-CAM Techniques to a Shipyard Sheet Metal ShopOne of the main functions of the sheet metal shop in a shipyard is to produce the duct work required for ventilating, heating and cooling the various parts of the ship. Because of the nature of this work and the craftsmen and the machine tool needs for carrying it out, the sheet metal shop becomes a likely candidate for the production of many other special metal parts needed in ship construction. To improve the efficiency of the sheet metal shop at the Avondale Shipyard facility in New Orleans, the introduction of a CAD-CAM system was considered in 1982. As the study progressed, it became apparent that the introduction of the CAD-CAM system being considered offered other opportunities to the operation. Not only would the system automate the production of duct work fittings, but it would also help reduce the labor and time needed for producing many other parts. In addition, it was determined that it could also serve as a DNC link between the Shipyard's ISM data base and the CNC flame cutting machines in the plate shop. |
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0.10 3rd Material 0.17 Total man-hours 0.20 Notching operation 0.50 2nd Material 1/3 Variance 15 mins 150 programming station 16 gauge 1st Material handling 20 gauge 20 mins 2nd Material handling approximately Avondale Industries Avondale Shipyards blank Cabinet Bottom Cabinet Partitions Cabinet Top CAD-CAM system CFC 150 machine CFC 150 programming coil line conventional manufacturing methods cutouts cutting table duct fittings flat cut forming and assembly forming area Variance Gauge Boards Harry Hooper Layout 4 pieces lift truck Man-hours per fitting Man-hours Prepare template Material handling Variance Material movement movement from vertical Moving the SS nesting nibbler plasma cutting machine plasma torch Preparing the program producing and delivering program and cutting programming station Variance Quantity produced shear and label shears Variance spent in producing SS sheet stainless steel storage to shears stud welding Total man-hours spent Transfer table Variance 0.10 3rd Variance 1/6 Variance 2 men wagon to forming