锻压技术

基于CCD的复杂异形件预成形结构优化锻造基于CCD的复杂异形件预成形结构优化

英文标题：Optimization on pre-formed structure for complex special-shaped parts based on CCD

单位：1.中国航发北京航空材料研究院铝合金研究所 2.北京市先进铝合金材料及应用工程技术研究中心 3. 中北大学材料科学与工程学院

分类号：TG316

出版年,卷(期):页码：2023,48(7):13-21

摘要：

将预成形件作为终成形坯料，并采用CCD算法对预成形结构进行优化设计，可减少预成形的复杂异形锻件飞边和锻造力。通过CCD算法，研究了不同截面参数L1、L2、H1和R对预成形锻件的飞边面积ΔA和压强p的影响。结果表明：飞边面积ΔA会随着L1、L2、H1和R的增加而逐渐增加；压强p随着L1的增加会先减小后增大，随着L2、H1和R的增加而逐渐减小。最佳工艺参数为L1=71.00 mm，L2=14.81 mm，H1=7.50 mm，R=6.50 mm，此时得到飞边面积ΔA=123.27 mm2，压强p=399.65 MPa，评价指标φ=1。模拟结果显示，金属流线分布合理，位移场符合实际流动规律。采用优化后的工艺参数成形的复杂异形锻件的表面光滑，无明显的折叠缺陷，证明了CCD算法对复杂异形件优化的可行性。

The pre-formed part was used as the final forming billet, and the pre-formed structure was optimized and designed using central composite design (CCD) algorithm to make the complex special-shaped forgings less flash in pre-forming and reduce the forging force. Therefore, the influences of different section parameters L1、L2、H1 and R on flash area ΔA and pressure p of the pre-forming forgings were investigated by means of CCD algorithm. The results show that the flash area ΔA gradually increases with the increasing of L1、L2、H1 and R, the pressure p first decreases and then increases with the increasing of L1, and gradually decreases with the increasing of L2、H1 and R. The optimal process parameters are L1=71.00 mm，L2=14.81 mm，H1=7.50 mm，R=6.50 mm, and the flash area ΔA=123.27 mm2, the pressure p=399.65 MPa, and the evaluation index φ=1. The simulation results show that the distribution of metal streamline is reasonable, and the displacement field conforms to the actual flow laws. The complex special-shaped forgings formed by the optimized process parameters have smooth surfaces and no obvious folding defects, which demonstrates the feasibility of optimization for CCD algorithm on complex special-shaped parts.

基金项目：

山西省重点研发计划（2020XXX015）

作者简介：马志峰（1977-），男，硕士，高级工程师 E-mail：zhifengma@163.com 通信作者：于建民（1974-），男，博士，教授 E-mail：yujianmin@nuc.edu.cn

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