THE CHARACTERIZATION OF ELECTROCHEMICALLY MACHINED SURFACES
THE CHARACTERIZATION OF ELECTROCHEMICALLY MACHINED SURFACES
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DOI：
10.1016/0043-1648(86)90265-6
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发表时间：
1986-05-01
期刊：
影响因子：
5
通讯作者：
STOUT, KJ
中科院分区：
文献类型：
--
作者：
MILEHAM, AR;HARVEY, SJ;STOUT, KJ
电解加工（ECM）是一种相对较新的非传统加工工艺，其中所产生的表面类型已被发现难以控制。通常宏观缺陷的存在，需要随后用手去除，这样的问题已经导致该过程失去工业favoration.Work为本文显示的原因宏观缺陷产生的电化学加工表面和如何可以避免在实践中得到完整的表面。整体电化学加工表面产生的特点是在Ra，偏度和峰度的范围内的钢。已经发现，切削条件的变化，特别是电解液流速和电流密度的变化，产生表面参数值的显著变化。例如，对于某些不锈钢，从正偏斜度到负偏斜度的变化可能会受到电解质流速增加的影响。表面参数是使用Talysurf 3连接到一台PET微型计算机上测量的，在材料和测试条件的范围内，参数值的变化如下：Ra= 0.15-2.50μm;偏度，从-0.6到+0.7;峰度，2.5-6。ECM测试在线性流动池中进行，使用10重量% NaCl水电解液。电解加工设备的电流密度可达0.5 A mm− 2，电解液流速可达32 m s−1，这是工业设备的典型值。因此，通过仔细控制切削条件和选择加工材料，可以生产出无缺陷且具有预定表面参数值的表面。
Electrochemical machining (ECM) is a relatively new non-conventional machining process, in which the type of surface produced has been found difficult to control. Often macro defects are present that require subsequent removal by hand and such problems have led to the process' losing industrial favour.Work for this paper has shown the reasons why macro defects are produced on electrochemically machined surfaces and how they can be avoided in practice to give integral surfaces. The integral electrochemically machined surfaces produced have been characterized in terms ofRa, skewness and kurtosis for a range of steels. It has been found that changes in cutting conditions, particularly electrolyte flow velocity and current density, produce significant variations in surface parameter values. For example, for certain stainless steels a change from a positive to a negative skewness can be effected by an increase in electrolyte flow velocity. The surface parameters were measured using a Talysurf 3 interfaced to a Commodore PET microcomputer and over the range of materials and conditions tested variations in the parameter values were found to be as follows:Ra= 0.15–2.50μm; skewness, from −0.6 to +0.7; kurtosis, 2.5–6. The ECM tests were carried out in a linear flow cell using a 10 wt.% NaCl in water electrolyte. The ECM rig was designed to give current densities of up to 0.5 A mm−2and an electrolyte flow velocity of up to 32 m s−1, values typical of industrial installations.It was concluded that, by both the careful manipulation of the cutting conditions and the choice of work material, surfaces could be produced that were defect free and possessed prespecified surface parameter values.