Abstract
The characteristics of sheet flexible-die drawing process were discussed, compared with traditional sheet drawing process, sheet flexible-die drawing process can improve the limit drawing ratio, reduce the forming force, balance the thickness distribution and enhance the formability of the sheet. In this paper, the forming principle, research status and the forming characteristics of hydroforming, viscous pressure and solid granules sheet drawing process were demonstrated. In addition, the improvement of forming quality and efficiency under the aid of ultrasonic vibration, electricity, magnetic field and the mixture of them were also reviewed.
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