Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第29卷    第4期    总第241期    2019年4月

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文章编号:1004-0609(2019)-04-0726-07
基于超声振动的镁合金双锥件颗粒介质成形工艺
曹秒艳1,房凯旋1,高明欣1,赵长财2

(1. 燕山大学 国家冷轧板带装备及工艺工程技术研究中心,秦皇岛 066004;
2. 燕山大学 先进锻压成形技术与科学教育部重点实验室,秦皇岛 066004
)

摘 要: 针对结构复杂且具有局部小特征的镁合金双锥件成形制造难的问题,提出一种超声振动辅助颗粒介质成形新工艺。基于有限元软件ABAQUS平台,从超声振动影响板材-模具及板材-介质之间摩擦因数的角度,建立AZ31B镁合金双锥形件的VGMF仿真模型,探讨不同振幅及压边间隙等工业参数对镁合金板材成形性能的影响。并运用有限元分析结果开展相应条件下的镁合金双锥形件VGMF相关试验,对模拟结果进行有效验证,证明该新工艺的适用性。结果表明:当压边间隙为1.25倍板厚时,板材具有较高的极限拉深比;超声振动能够有效降低成形力,改善壁厚均匀度,提高板料的成形极限,VGMF工艺为镁合金板材成形复杂截面零件提供新方法。

 

关键字: 镁合金;双锥形件;超声振动;颗粒介质

Granular medium forming technology of magnesium alloy biconical parts based on ultrasonic vibration
CAO Miao-yan1, FANG Kai-xuan1, GAO Ming-xin1, ZHAO Chang-cai2

1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China;
2. Key Laboratory of Advanced Forging & Stamping Technology and Science, Ministry of Education of China, Yanshan University, Qinhuangdao 066004, China

Abstract:The vibration granules medium forming (VGMF) was proposed to solve the manufacturing problem of a AZ31B magnesium alloy biconical specimen with some small local complex structures. The VGMF process simulation model of AZ31B magnesium alloy biconical parts was established with ABAQUS from the effect of vibration on the friction coefficients of sheet-die and sheet-medium, and the influences of different amplitudes and blank-holder gaps on magnesium alloy sheet forming properties were discussed. The accuracy of simulation results was proved by the VGMF test of AZ31B biconical parts, and the applicability of the new process was proven. The results show that the ultrasonic vibration can reduce the forming force, keep the uniformity of the thickness, and improve the forming limit of the sheet metal, and when the blank-holder gap is 1.25 times of sheet thickness, the magnesium alloy sheet has a higher limit drawing ratio (LDR). VGMF provides a new method for forming complex cross-section parts of magnesium alloy sheet.

 

Key words: magnesium alloy; biconical part; ultrasonic vibration; granules medium

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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