The Influence of Machining Parameters on the Surface Porosity of a Closed-Cell Aluminium Foam

IF 1.2 4区 工程技术 Q3 ENGINEERING, MECHANICAL Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2019-12-20 DOI:10.5545/sv-jme.2019.6297
B. Razboršek, Janez Gotlih, Timi Karner, M. Ficko
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引用次数: 6

Abstract

Aluminium foam elements foamed into moulds, have a porous core, surrounded by a thin layer of non-porous outer surface. This layer affects the homogeneity and mechanical properties of the element significantly. To produce functional elements, the foams can be machined to a desired end shape. Machining deforms the surface structure, which results in a reduction of strength properties. This article describes an experimental approach to determine the effects of machining parameters on the surface porosity of closed-cell aluminium foam samples. The samples were machined by incremental forming and friction rolling with precisely defined processing parameters (deformation depth, feed rate and spindle speed). High-resolution digital photos of the treated surfaces were taken and analysed using image segmentation with a multispectral threshold algorithm. The change of surface porosity was calculated for each sample, and the influence of the selected machining parameters was determined by the use of response surface methodology. The optimal machining parameters are presented.
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加工参数对闭孔泡沫铝表面孔隙率的影响
泡沫铝元件发泡成模具,有一个多孔的核心,由一薄层无孔的外表面包围。这一层对元件的均匀性和力学性能有显著影响。为了生产功能元件,泡沫可以加工成所需的最终形状。加工使表面结构变形,导致强度性能降低。本文介绍了一种测定加工参数对闭孔泡沫铝试样表面孔隙率影响的实验方法。在精确确定的加工参数(变形深度、进给速度和主轴转速)下,采用增量成形和摩擦轧制的方法对样品进行加工。采用多光谱阈值算法对处理表面进行图像分割和分析。计算了各试样表面孔隙率的变化,并利用响应面法确定了所选加工参数对试样表面孔隙率的影响。给出了最佳加工参数。
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来源期刊
CiteScore
3.00
自引率
17.60%
发文量
56
审稿时长
4.1 months
期刊介绍: The international journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.
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