Effects of pulsating electrolyte flow in electrochemical machining
Effects of pulsating electrolyte flow in electrochemical machining
复制标题
电化学加工中脉动电解液流动的影响
DOI：
10.1016/j.jmatprotec.2013.07.012
复制
发表时间：
2014-01-01
影响因子：
6.3
通讯作者：
Zhu, Di
中科院分区：
文献类型：
--
作者：
Fang, Xiaolong;Qu, Ningsong;Zhu, Di
电化学加工（ECM）是一种有前途的和低成本的工艺，用于生产各种难加工材料的组件，并已在各种应用中得到很好的建立。电解加工中气体和温度的分布影响电解液的电导率，决定着电解加工的精度。在电解加工中，利用伺服阀在电解液供应管中产生脉动流，以改善电解加工中的传热、材料去除率和表面形貌。提出了一个电、热、稀相输运和流体流动的多物理场耦合模型。模拟结果表明，脉动流对工件表面附近沿着流动方向的速度分布、含气量分布和温度分布有显著影响。通过实验验证了该工艺的可行性，并研究了脉冲流对材料去除率的影响。实验结果与模拟结果吻合较好。采用优化的脉冲参数，提高了材料去除率和表面轮廓。(C)2013爱思唯尔有限公司版权所有。
Electrochemical machining (ECM) is a promising and low-cost process for yielding various components of difficult-to-machine materials, and has been well established in diverse applications. Distributions of gas and temperature affect the electrolyte electrical conductivity and determine the machining accuracy in ECM. Attempts have been made to generate the pulsating flow via a servo-valve in the electrolytic supply pipe, which is introduced to improve the heat transfer, material removal rate and surface profile in ECM. A multi-physics model coupling of electric, heat, transport of diluted species and fluid flow is presented. Simulation results indicate that pulsating flow has a significant impact on the distributions of velocity, gas fraction, and temperature near the workpiece surface along the flow direction. Experiments are conducted to verify the feasibility of the proposed process and study the effects of pulsating flow on material removal rate. The experimental results agree well with the simulations. Using optimal pulsating parameters, the material removal rate and surface profile are enhanced. (C) 2013 Elsevier B.V. All rights reserved.