Research on Tool Wear Rate of Powder Mixed near Dry Electrical Discharge Machining
Research on Tool Wear Rate of Powder Mixed near Dry Electrical Discharge Machining
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DOI：
10.4028/www.scientific.net/amr.652-654.2222
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发表时间：
2013-01
期刊：
影响因子：
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通讯作者：
X. Bai;Q. Zhang;Tingyi Yang;Jian Hua Zhang;Jing Tan
中科院分区：
文献类型：
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作者：
X. Bai;Q. Zhang;Tingyi Yang;Jian Hua Zhang;Jing Tan
混粉近干式电火花加工（PMND-EDM）是一种以气-液-粉混合物为电介质的新型电火花加工方法。在单因素试验的基础上，研究了PMND电火花加工中的刀具磨损率。研究了峰值电流、脉冲通断时间、流量、粉末浓度、刀具转速和气压等工艺参数对TWR的影响。TWR随峰值电流的增大而增大。TWR随脉冲导通时间的增加而减小。TWR随脉冲关断时间的增加先增大后减小。流量的增加导致TWR的增加。随着粉体浓度的增加，TWR先增大后减小。刀具旋转机构的存在降低了刀具磨损率，而转速的进一步提高则导致刀具磨损率的增加。空气压力的增加导致TWR降低。
Powder mixed near dry electrical discharge machining (PMND-EDM) is one of the novel EDM processes, which uses gas-liquid-powder mixture as the dielectric medium. The tool wear rate (TWR) in PMND-EDM is researched based on single factor experiments. Effects of process parameters, such as peak current, pulse on time, pulse off time, flow rate, powder concentration, tool rotational speed and air pressure, on TWR are found out. TWR increases with the increase of peak current. TWR decreases with increasing of pulse on time. TWR increases firstly and then decreases while pulse off time increases. Increase of flow rate results in the increase of TWR. With the increase of powder concentration, TWR increases firstly and then decreases. Existence of tool rotation facilities decrease of TWR, however, further increase of rotational speed leads to increase of TWR. Increase of air pressure leads to lower TWR.