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材料工程  2014 

压电驱动式微挤压成形系统设计及实验研究

DOI: 10.3969/j.issn.1001-4381.2014.03.009, PP. 50-54

Keywords: 压电驱动,微挤压,预紧力,成形温度

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Abstract:

针对压电陶瓷在作为微成形驱动器时存在的行程短、公称载荷低等问题,设计了"滑轮-丝杠-楔块"自动进给机构以实现坯料的持续挤压,采用温成形工艺改善金属成形性来扩大压电驱动系统可成形材料的范围。以此为基础,构建压电驱动式微挤压成形实验系统,并利用ZnAl4合金进行了实验验证。实验结果表明在循环工作模式下,调节进给机构的预紧力至2600N,可以获得良好的自动进给效果和较高的成形效率;成形温度由230℃增加至270℃时,挤压ZnAl4合金所需挤压力减小50%左右。

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