الفهرس 
Chapter One : Introduction And Literature SurveyOnly 14 pages are availabe for public view
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Abstract
Spinning process is a sheet metal forming technology used for the production of the symmetrical industrial extraordinary parts. This process is an efficient and low cast manufacturing process. In addition, it has been widely used in various engineering applications.
In this research, new Technique was developed to perform three different operations in the same stroke, namely conventional spinning, shear spinning which define as (wall thickness reduction) and burnishing processes, respectively. This new approach has been performed by a developed tool which consists of three stages as following. The first stage: consists of two rollers which carry out conventional spinning process; the second one includes two opposite balls to perform the process of shear spinning and the last stage comprises another two opposite balls to perform the process of burnishing.
The main difference that can be observed between burnishing balls and shear one is that burnishing balls have a spring arrangement to determine the load require. A computer-aided design (CAD) were performed to insure a proper setup design. This has been done using “SOLIDWORKS” simulation tool. A theoretical approach was investigated and compared with experimental results.
The response of the product quality and required load to process parameters such as rotational speed (46,76,150 and 230 rpm), axial feed (0.15,0.3,0.6 and 1.21 mm/rev), burnishing load (20, 25 and 30 KN), distances between shear balls, and distance between burnishing balls was checked and clarified.
The results indicate that, the optimum condition for forming load and surface roughness occurred at rotation speed at 150 rpm, axial feed 0.3 rev/mm and burnishing load 25 KN. The surface roughness of the new technique products has been found to be about 0.41 µm and the forming load not more than 6 kN at optimum case. when distance between the shear balls increases the forming load decrease until it reaches its lowest level at 2 mm, any further increase in this distance increases the process load. Hardness and surface roughness increase by increasing the distance between shear balls. It can be also concluded that the hardness and forming load increases with the increase of space between burnishing balls. However, the surface roughness improves with increasing burnishing balls distance.