Theoretical analysis and prototype machine of rotating compressing forming of cylinder

• Main Authors: Ching-Jyi Chen, 成清吉
• Other Authors: Jin-Bin Yang
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/68800802906995405962

碩士 === 國立高雄第一科技大學 === 機械與自動化工程所 === 91 === The compression force generated is large and the side surface of cylinder is easy to cause bulge by using the traditional compression forming technology. It makes the energy consumption and affects the precision of product. Letting the cylinder rotate and applying the compression force in using the rotating compression forming technology will be helpful for reducing the compression force and the bulge effect of side surface of cylinder. With a view to establishing an analytical model based on dual streamline function and upper bound method to obtain the compression force assuming no bulge effect on side surface. The total power rate of energy consumption based on the upper bound method is constructed by way of streamline function defined by the kinematically admissible velocity field. Moreover the optimum variable parameters are obtained by using the energy minimum method. According to the analytical model shows that, the cylinder rotated and reduction ratio increasing, effect of reducing the compression force will be increased with the ratio of thickness to diameter（h0 / d0）increase. The angular velocity of cylinder increased, higher frictional factor, compression force reducing effect increase, too. In addition, for the purpose of investigating the further realistic rotating compression forming situation, in this study the prototype machine of rotating compression forming is especially designed and manufactured in order to perform further experimental verifications in the future.