ملخص البحث :

Today's, automated process planning is becoming a widely prevalent technology in modern manufacturingsystems. Feature concept is a core required to realize a fully integrated CAD/CAM system. The contents of a feature'sinformation can simply be transferred from one manufacturing activity to another. in the last few years, Automatedprocess planning based on features technology has become popular with its capacity to combine design andmanufacturing systematically. Despite its advantages, it is still difficult to recognize and extract manufacturing featuresautomatically from the CAD system database. This paper addressed the development of a Feature-Based Process PlanningSystem (FBPPS) integrated with CAD systems Automatically. The developed system used the knowledge-base method toexecute process planning tasks that include; process selection, process sequences, machine tool selection, tool selection,and cutting conditions. Feature recognize module based on syntactic recognition technique has been introduced usingCAD database of 3D component geometry model. The process planning module has been implemented using decisionmakingprocedures based on the feature recognition stage. The proposed framework was implemented on personalcomputers using AutoCAD 2014 as the CAD modeling system and Visual-Basic 2010 as the programming environmentto build the decision-making knowledge base. A 3D CAD model of the prismatic mechanical part has been selected as acase study to examine and evaluate the FBPPS ability. The final results of the test show the success of the proposedsystem on manufacturing feature recognition and generate a process plan automatically.

ملخص البحث :

Engineering materials are used in many engineering applications in various forms; these materials may be subjected to wrong or sudden applications during use. This is why the knowledge of the characteristics of these materials bearing different forms of sudden loads is essential for the success of the engineering design and the performance of the desired end.In this research, the effect of the angles and thickness of engineering materials on the value of the energy required to fracture when loads suddenly shed was studied. To study these effects, test samples were prepared (Izod samples) with notch depths of 2, 4, and 6 mm at fixed angles; samples were also prepared with a fixed notch depth and different notch angles (60º, 120°,180°). Three tests were conducted in each case and the results showed that the differences in the resulting values did not exceed 3%. The average of the absorbed energy values demonstrated the impact of the variables. Increases in the depth of the notch were also found to increase the value of energy absorbed per unit area, as well as the notch depth, leading to ductile fracture compared with the standard notch depth. Furthermore, increases in the notch angle to 120º caused a marked change in the ductile fracture.The process parameters were optimized using RSM and from the obtained model, the optimal condition was determined at a 95% confidence interval.

ملخص البحث :

Different concentrations of nano-alumina solution ranging from (0.1-0.4) were used as hardening solutions for aluminum alloy 6061, where the effect of the change in concentrations on the microstructure of the surface of the samples was studied, as well as its effect on the mechanical properties of the same samples. The interaction of Nanoparticles from the solution with the surface of the sample was detected by tunneling electronic microscope (TEM), this good interaction led to a noticeable increase in its mechanical properties and the highest increase was when the concentration of the Nano solution was 0.3%.