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This study presents a new approach of localization for an elastic periodic cutting tool holder of milling machine. The paper presents a study of the factorial design application to optimize surface quality in end milling operation. Maintaining good surface quality usually involves additional manufacturing cost or loss of productivity. Therefore, mathematical model using Matlab which is feasible and applicable in prediction of surface roughness is developed. Proper setting of cutting parameter is important to obtain better surface roughness. Spindle speed, feed rate, and depth of cut have been chosen as predictors in order to predict surface roughness. 16 samples were run by using Emco CNC Milling machine tool. The predicted surface roughness has been obtained by using average percentage error method. A numerical model that describes the structure of the periodic holder is developed. The approximate values of periodic holder model versus to straight are plotted. The results from this research are useful to be implemented in industry to reduce time and cost in surface roughness (response) prediction.

The idea of the research relies on the concept of the matrix structures, and the study of the bending and shaking forces of their layers. The destructive effects of the waves are shown more significantly when increasing the number of plates or units because the waves absorbed or refracted are identical in changes when occurring in the medium plates. A Matlab model was designed based on a set of formulae with 3D three periodic plates, to compute mass and stiffness of the plates and compute the values of deflections and displacement. The programme re-implemented again on the premise that the plates made of straight iron block materials to compute deflections values, and compare with periodic plates prepared from copper and iron. After examining the overall structure of the periodic landfill forms of 'iron block' and 'copper' and it's mechanical characteristics, and trying to figure out the usefulness of adding copper on side limbs, show that there is a direct correlation of forces acting on the roofs of copper plates dumped on the basic plate 'iron' with landfill deflections, and can control plate displacements and reduce external deflections. The study shows that there is an increase in durability and resistance in periodic injections with influential powers.

Since its inception, friction stir welding, FSW has been promising easy operation and environmental stewardship through contact friction between the tool and the weld part. The Aluminum alloy 2024-T351 was used in both working pieces. Six processes in FSW may include sticking, plunging into the welding pieces, half and full sliding, full welding along the joint line for the weld to be created, and spacing when picking away the welding tool from the weld. In determining the weld quality, their values should be within a safe range during the welding process, to derive heat from friction, modifying the parameters of the process causes variation in force in the traverse and axial directions. The ability to measure forces and understand their relationship with welding parameters is essential to a successful FSW energy strategy. The analytical models presented in this study depict each welding phase as it occurs and can be applied to predict welding forces and the heat energies.