锻压技术

夹钳数量对双曲顶件拉伸成形的影响

英文标题：Effect of clamp quantity on stretch forming for hyperbolic top part

关键词：双曲顶件夹钳拉伸成形贴模应变厚度

分类号：TG386

出版年,卷(期):页码：2022,47(4):91-94

摘要：

利用有限元软件ABAQUS，以双曲顶件为研究对象，建立不同夹钳数量下的拉伸成形有限元模型，分析夹钳数量对板料成形效果的影响。结果表明：拉形力相同时，随着夹钳数量的增加，板料的成形性更好。整体夹钳和5个夹钳拉伸成形的板料均未完全贴模，后者的贴模程度优于前者；10个和15个夹钳的拉伸成形板料完全贴模，后者得到的成形件的应变、厚度分布比前者更均匀。在柔性拉伸成形装置上进行双曲顶件成形试验，试验结果与数值模拟结果相吻合，验证了双曲顶件柔性拉伸成形的可行性和数值模拟的准确性。

For the hyperbolic top part, the finite element model of stretch forming with different numbers of clamps were established by finite element software ABAQUS, and the influence of the number of clamps on the forming effect of sheet metal was analyzed. The results show that when the stretch force is the same, with the increasing of the number of champs, the formability of sheet metal is better. The sheet metal stretched by the whole clamp and five clamps cannot be completely fitted the mold, and the degree of die fitting for the latter is better than that for the former. The sheet metal stretched by ten clamps and fifteen clamps can be completely fitted the die, the strain and thickness distributions of the forming part for the latter is more uniform than that for the former. The forming test of the hyperbolic top part was conducted by flexible stretch forming device, and the test results are in agreement with the numerical simulation results, which verifies the feasibility of flexible stretch forming for the hyperbolic top part and the accuracy of the numerical simulation.

基金项目：

吉林化工学院重大科技项目(2019017)；吉林化工学院博士启动基金项目（2021023）

作者简介：程艳艳（1980-），女，博士，副教授 E-mail：chengyanyan1980@sina.com

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