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灰色预测模型在自由折弯中的应用
英文标题:Application of grey prediction model in free bending
作者:付争伟 陶晶 赵刚 
单位:武汉科技大学 湖北理工学院 
关键词:折弯成形 弯曲回弹 灰色系统 灰色预测技术 折弯角 
分类号:TG316.2
出版年,卷(期):页码:2019,44(9):63-67
摘要:

为解决板件在折弯时由于弯曲回弹造成的折弯精度不足,揭示了折弯成形角与折弯上模下压量的关系,使得通过控制上模下压量能够精确快速地得到折弯成形角,并以Q235钢自由折弯实验数据为基础,建立了自由折弯上模下压量和折弯成形角的灰色预测GM(1,1)模型;并根据实际情况,为了减小预测模型和实际值拟合误差,采用首尾灰色预测建模方式,得到分段折弯上模下压量和折弯成形角的数学模型;并在ABAQUS仿真软件中模拟验证出预测模型与实际最大误差为0.14%,满足实际生产要求。该研究表明,在实际折弯生产过程中,可以通过对上模下压量的调节得到预期的折弯成形角,使得折弯成形角的精确控制成为可能。

In order to solve the problem of insufficient bending precision caused by bending springback for sheet metal during bending, the relationship between bending angle and pressing amount of upper die was revealed, so that the bending angle was obtained accurately and rapidly by controlling the pressing amount of upper die. Based on the experimental data of free bending for Q235 steel, the grey prediction GM(1,1) model of the pressing amount of upper die and bending angle in free bending was established, and according to the actual situation, in order to reduce the fitting error between prediction model and actual values, the mathematical models of the pressing amount of upper die and the bending angle in the segmented bending were obtained by the head-to-tail gray prediction modeling method. Furthermore, the maximum error between the prediction model and the actual data is 0.14% by the ABAQUS simulation verification, which meets the actual production requirements. The research shows that the expected bending angle is obtained by the control of the pressing amount of upper die during the actual bending process, and the accurate control of bending angle is possible.

基金项目:
国家自然科学基金青年项目(51405145);湖北省教育厅科学研究计划青年人才项目(Q20144404)
作者简介:
付争伟(1995-),男,硕士研究生 E-mail:1065171787@qq.com 通讯作者:赵刚(1976-),男,博士,教授 E-mail:zhaogang76@wust.edu.cn
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