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Petrushina
Investigation of stability of the combined process of drawing and oncoming flanging at stamping rings with double walls
Engineering Education # 03, March 2013 DOI: 10.7463/0313.0541172 The authors investigate the influence of correlation coefficients of drawing and flanging on stability of the combined process of obtaining profile rings with double walls. Finite element method is used. To assess the stability, wall height is recorded. It was determined that when drawing and flanging coefficients change there is a critical ratio of the coefficients at which the process loses stability. Relative thickness of a work piece has a determining influence on stability. Application range of this combined process expands with the increase in relative thickness, with the decrease in the punch radius of curvature and with the use of stainless steel.
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