Springback Evaluation In Basic Sheet Metal Stamping Processes
In the present paper a measurement technique based on the shadow moiré method has been set up in order to evaluate the springback phenomenon in deep drawing operations. Two proper coefficients are introduced to quantitatively describe the effect considered. In particular the proposed technique is able to acquire the final profile of the drawn parts along one or more generatrices, once extracted out from the dies and to compare such profile with the ideal one derived from the dies CAD geometry. The proposed technique has been applied to an axysimmetrical deep drawing operation and moreover the influence of the blankholder force level and of the lubricating conditions have been taken into account.
KeywordsFringe Pattern Deep Drawing Process Material Yield Stress General Motor Research Fourier Transform Method
Unable to display preview. Download preview PDF.
- 3.Sciammarella, C.A., Ahnadshahi M.A.: Detection of fringe pattern information using a computer based method (1986), Proc. of the VIIIth Int. Conf. on Experimental Stress Analysis, pp.359–368.Google Scholar
- 4.Post, D., Han, B., Ifjiu, P., High sensitivity Moiré, (1994) Springer Verlag Ney York, p.119–124, p. 419–426Google Scholar
- 6.Papoulis, A.: Signal Analysis, (1984), McGraw-HillGoogle Scholar
- 7.ISO — Guide to the Expression of Uncertainty in Measurement (1993) Switzerland, first ed.Google Scholar