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IJSTR >> Volume 10 - Issue 11, November 2021 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

An Investigation of Tube Spinning Using Ballizing Technique

[Full Text]



M. H. Kassar, S. Z. El-Abden, M. N. El-Sheikh



Tube spinning, Conventional spinning, Ball spinning, pile-up, thin wall thickness cup.



Thin-walled cup is considered as main parts in the development of aeronautic, aerospace, rocket capsule components, military industry, and other manufacturing process for daily use parts. These parts can be produced by conventional spinning with rollers or by ball spinning process. Recent development of ball spinning of tubes and thin wall thickness cup face challenge of large, consumed load due to material built up formation in front of the forming balls, this problem have been addressed separately in the literature without a unified approach to simultaneously overcome it. The current study introduces a new ball set design that is claimed to be able to overcome the pile-up problem simultaneously using a new forming tool based on ball spinning process or it can be called Ballizing technique. The new proposed design is built and verified. The proposed design consists of 4 balls distributed in four planes, having one ball in each plane. The first plane is set to suppress the pile-up formation, the second, third and fourth plane are set for the main forming process. Each two consecutive planes are shifted by 90 deg. from each other to suppress the folding creation. The results show that the new design has shown the potential to significantly overcome the pile-up formation in front of the forming balls beside its ability to complete the process with less forming force. The optimum rotational speed of the mandrel with the optimum feed rate of tool regarding the process load were determined.



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