鲍文科,曹光明,褚兴荣,魏文庆

• 1:潍坊学院机电与车辆工程学院
• 2:山东大学力学与机电装备联合研究中心

摘要(Abstract)：

基于自主设计的综合实验平台,开展了AZ31B镁合金板材的电致塑性渐进成形实验研究。利用正交试验分析方法,研究了电致塑性渐进成形各关键工艺参数对AZ31B镁合金制件成形质量的影响。结果表明:电脉冲参数是影响AZ31B镁合金制件几何精度的最显著因素,制件的几何精度随电脉冲参数的增加而明显提高;较低的进给速率可明显减小制件成形高度误差,而较低的层间步进量会增大成形高度误差;除电脉冲参数外,工具头直径对制件回弹角度有较明显影响;选取8 mm直径工具头可提高制件表面硬度,其他因素影响不显著。综合分析,选取电脉冲参数、进给速率、层间步进量和工具头直径分别为80 V/400 Hz、800 mm/min、0. 2 mm和8 mm的参数组合时,制件的成形质量最优。另外,微观组织研究表明,较高电脉冲参数能更大程度促进AZ31B镁合的动态再结晶,从而提高其塑性,改善制件的成形精度。

关键词(KeyWords)： 镁合金板材;电致塑性;渐进成形;成形质量

Abstract:

Keywords:

基金项目(Foundation): 山东省自然科学基金(ZR2019BEE060);; 潍坊学院博士科研基金(2017BS12)

作者(Author): 鲍文科,曹光明,褚兴荣,魏文庆

DOI: 10.13289/j.issn.1009-6264.2019-0220

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