粉末低电压电磁压制实验研究

EXPERIMETAL RESEARCH ON LOW-VOLTAGE ELECTROMAGNETIC COMPACTION OF POWDER MATERIALS

将低电压电磁成形方法用于粉末材料压制 ,采用间接加工方式对铝、铜、锡粉进行了压制实验 ,在成功压制出高密度粉末制品的基础上 ,分析了电压、电容、摩擦、压制次数、粉末粒度等因素对制品压实密度的影响。实验结果表明 ,对不同粉末材料 ,在保证一定加载速率和放电能量的前提下 ,降低电压和增加电容 ,有利于提高粉末制品压实密度及其均匀性 ;电压越高 ,摩擦能量消耗率越大 ;当设备放电能量有限时 ,多次压制是获得致密均匀。

The low\|voltage\|electromagnetic forming has been applied to powder compaction in this work.A series of experiments have been made to compact aluminum,copper and tin powders in the indirect working way.Having compacted high\|density powder parts successfully.The authors analyzed the effect of voltage,capacitance,friction,compaction times,powder size and other factors on the density of compacted specimen.The experimental results show that lower voltage but larger capacitance are beneficial to increase the density and uniformity of the compacted specimen,if the loading velocity and discharging energy are suitable.The higher the voltage, the greater the percentage of energy consumed by friction.When the equipment energy is limited,iterative compaction is the effcient way for manufacturing even and high density powder parts.