By plasticity increment theory, the stress strain numerical calculate methods of bellows bulge forming, solvers theory calculating problems of bellows bulge forming technology are put forward.
According to the character of hydraulic bulge and the theory of plastic deformation, a testing method of hydraulic bulge to evaluate the forming property of sheet metals is put forward.
本文根据液压胀形的特点，利用塑性变形原理，提出评定板材成形性能的液压胀形试验法。
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Based on this theory, the new conceit of bulge forming technology of minimal thinned rate bellows is formulated and realized, minimal rate bellows is developed successfully.