工具头转速对TRIP钢板渐进成形微观组织的影响
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摘要
将渐进成形与液压胀形进行对比,研究了不同工艺下成形零件微观组织的差异,在此基础上研究工具头转速对渐进成形零件微观组织的影响。结果显示,液压胀形与渐进成形过程中均产生了晶粒细化,渐进成形中晶粒细化程度明显比液压胀形好,且工具头转速越快,成形零件的晶粒细化效果越好。由试验结果推断,渐进成形时工具头旋转所产生的切应力改变了工具头下方成形金属的应力状态,在该应力状态的作用下,晶粒细化程度增加,成形性能更好。
Compared the incremental forming with hydraulic bulging, the microstructures of part in the different process were researched. On this basis, the influence of tool rotational speed on the microstructure of part in incremental forming process was studied. The results showed that the grain refinement was occurred during hydraulic bulging and incremental forming, and the grain refinement of incremental forming was significantly better. The faster the tool rotational speed was, the grain refinement effect was better. From the experimental results, it could be inferred that the shear stress produced by the rotation of the tool during incremental forming would change the stress state of the metal below the tool. Under the action of the stress state, the grain refinement would be intensified and the formability would be better.
Compared the incremental forming with hydraulic bulging, the microstructures of part in the different process were researched. On this basis, the influence of tool rotational speed on the microstructure of part in incremental forming process was studied. The results showed that the grain refinement was occurred during hydraulic bulging and incremental forming, and the grain refinement of incremental forming was significantly better. The faster the tool rotational speed was, the grain refinement effect was better. From the experimental results, it could be inferred that the shear stress produced by the rotation of the tool during incremental forming would change the stress state of the metal below the tool. Under the action of the stress state, the grain refinement would be intensified and the formability would be better.
引文
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[7]田野,李萍,薛克敏,等.高压扭转压力对304不锈钢组织及性能影响[J].塑性工程学报,2016,23(2):98-102.
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[10]尹云洋,杨王明,李龙飞,等.基于动态相变的热轧TRIP钢组织及性能研究[J].金属学报,2008,44(11):1299-1304.
[11]周六如,郑志强,罗忠民.工具转速对AZ31B镁合金圆锥盒摩擦热渐进成形板料温度及成形能力的影响[J].锻压技术,2016,41(9):31-34.
[2]KIM T J,YANG D Y.Improvement of formability the in?cremental sheet metal forming process[J].International Journal of Mechanical Sciences,2000,42(7):1271-1286.
[3]AMBROGIO G,FILICE L.Application of incremental forming process for high customized medical product manufacturing[J].Journal of Materials Processing Tech?nology,2005,162:156-162.
[4]姜虎森,王进,王廷和,等.主轴转速对单点渐进成形工件表面粗糙度的影响[J].锻压技术,2011,36(3):33-36.
[5]安治国,庞鹏辉,陈科衡,等.有模单点渐进成形工艺参数对1060铝合金成形性能的影响[J].锻压技术,2017,42(11):94-98,171.
[6]赵继承,韦红,余梁颖,等.基于有限元复杂回转体渐进成形过程研究[J].机械制造与研究,2010,39(1):18-21.
[7]田野,李萍,薛克敏,等.高压扭转压力对304不锈钢组织及性能影响[J].塑性工程学报,2016,23(2):98-102.
[8]常小涛,彭守桃,李军,等.不同层间距对板料渐进成形影响的数值模拟与试验研究[J].模具工业,2011,37(2):11-14.
[9]王宝平,王进,陶龙马,等.TRIP590板料渐进成形失效研究[J].模具工业,2013,39(5):24-27.
[10]尹云洋,杨王明,李龙飞,等.基于动态相变的热轧TRIP钢组织及性能研究[J].金属学报,2008,44(11):1299-1304.
[11]周六如,郑志强,罗忠民.工具转速对AZ31B镁合金圆锥盒摩擦热渐进成形板料温度及成形能力的影响[J].锻压技术,2016,41(9):31-34.