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利用密栅云纹法获得了杯形件常规反挤及在最简活动凹模(浮动凹模)条件下反挤时的云纹图,然后通过合适的数学处理方法和电算技术将云纹图所提供的数据进行拟合,求导和数值计算,得到了积极摩擦反挤时杯形件内部的应力一应变分布图。揭示了该项新工艺的应力应变分布特点,为积极摩擦反挤压的实际应用提供了必要的理论依据。
By the use of the dense grille moiré, the moiré pattern of conventional anti-extrusion of the cup and the anti-extrusion under the condition of the most simple movable die (floating die) is obtained. Then, the moiré pattern is obtained by the appropriate mathematical processing method and computing technique The data provided in the figure are fitted, calculated and calculated, and the stress-strain distribution inside the cup is obtained when positive friction and anti-extrusion are obtained. The stress and strain distribution characteristics of this new process are revealed, which provides the necessary theoretical basis for the practical application of active friction anti-extrusion.