摘要
设计并优化了一种盘式铝合金汽车轮毂的锻造工艺及模具,结合数值模拟明确了锻造过程中金属的流动规律。针对此类盘式铝合金汽车轮毂的结构特点,提出了一种预锻件-终锻模具内嵌式相切的设计方法。基于此设计方法,通过数值模拟得出了合理的预锻上模压下量为50~70 mm。优化的锻造工艺和模具解决了轮毂初始坯料和预锻件与模具间定位难的问题,并消除了终锻件的折叠缺陷。利用优化后的锻造模具和工艺进行了锻造生产试验,对轮毂终锻件不同部位进行了组织表征和力学性能测试。结果表明,采用提出的预锻模具设计方法及推荐的预锻上模压下量,轮毂锻件成形质量良好,飞边分布均匀且无折叠缺陷,不同部位的组织和力学性能均满足要求。
The forging process and dies of a disc-type aluminum alloy automobile wheel hub were designed and optimized.The law of metal flow in forging process was clarified by numerical simulation.In view of the structural characteristics of this kind of disc-type aluminum alloy automobile wheel hub,an embedded tangency design method between pre-forging-final forging die was proposed.Based on the design method,the reasonable reduction amount of pre-forging upper die of 50-70 mm was obtained by numerical simulation.The problem of difficult positioning between the initial billet of wheel hub and pre-forging with dies was solved by the optimized forging process and dies,and the folding defect of final forging was avoided.The forging production tests were carried out by the optimized forging dies and process,and the microstructure characterization and mechanical properties test at different positions of the wheel hub final forging were carried out.The results show that the wheel hub forgings achieve a good forming ability with uniform flash distribution and no folding defect,and the microstructure and mechanical properties of different parts meet the requirements by the proposed design method of pre-forging dies and the recommended reduction amount of pre-forging upper die.
作者
王晓伟
李洪光
孙谱
赵国群
WANG Xiao-wei;LI Hong-guang;SUN Pu;ZHAO Guo-qun(School of Material Science and Engineering,Shandong University,Jinan 250061,China;Shandong Juncheng Metal Technology Co.,Ltd.,Liaocheng 252100,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2023年第7期55-61,共7页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51735008)
山东省重大科技创新项目(2019TSLH0102)。
关键词
轮毂
锻造
模具
铝合金
微观组织
力学性能
wheel hub
forging
die
aluminum alloy
microstructure
mechanical property
