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用聚碳酸脂作模型材料,对大锻件坯料锻粗时内部缺陷孔径与压下量的关系,以及带孔件和实心件的变形场,进行了光塑性模拟研究.认为光塑性方法用于大锻件模拟研究具有可行性,是有应用前景的实验手段.实验结果表明:镦粗时,压下率达55%以后,通孔缺陷直径开始收缩.应变沿高度方向变化剧烈,大变形区集中在锻件中部,占锻件高度约50%.孔边有应变集中现象,用通孔模拟疏松对应变场有一定影响.用疏松材料代替通孔进行模拟会使虚变场更加接近实际情况.
Using polycarbonate as the model material, the relationship between the hole diameter and the reduction of the internal defects and the deformation field of the hole and solid parts during the forging of the forging blank were studied, and the plastic-plastic simulation was carried out. The feasibility of the forgings simulation is a promising experimental method.The experimental results show that the diameter of the through-hole defects begins to shrink after the reduction of up to 55% at upsetting.The strain changes sharply in the height direction, Forging the middle, accounting for about 50% of the height of forgings.Hearing side of the hole there is a phenomenon of strain, with the hole through the loose simulation of the deformation field has a certain impact.Using loose material instead of through-hole simulation will make the virtual field closer to the actual situation.