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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part B. Journal of engineering manufacture >The use of high-frequency acoustic emission analysis for in-process assessment of the surface quality of aluminium alloy 5251 in abrasive waterjet machining
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The use of high-frequency acoustic emission analysis for in-process assessment of the surface quality of aluminium alloy 5251 in abrasive waterjet machining

机译：高频声发射分析对磨料水射流加工铝合金5251的铝合金5251表面质量的过程质量分析

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摘要

In this article, the use of acoustic emission signal analysis for in-process assessment of the surface quality in abrasive waterjet machining is presented. The authors carried out an analysis of the influence of the cutting head traverse speed (considered in this case as the performance measurement) on the flatness, waviness and roughness of surfaces made of aluminium alloy 5251 after cutting process, as well as the influence of changing the quality factor on values of selected descriptors of the emitted high-frequency acoustic emission signal processed in the frequency domain. This was a new approach, different from the norm, in which an acoustic emission signal is usually studied for low frequencies. The obtained results confirmed the clear influence of machining conditions on the geometric structure of the obtained cuts and the registered values of the emitted stress waves. This influence can be accurately determined by the use of the high-frequency acoustic emission signal analysis being proposed. Additionally, statistical dependence models developed between the given process quality indicator and the registered selected acoustic emission signal parameters in the frequency domain allowed for the prediction of the surface texture of the obtained cuts on the basis of the acoustic emission signal emitted during the machining process.
机译：在本文中，提出了使用声发射信号分析对磨料水射流加工中的表面质量的过程质量进行。作者对切割过程之后的铝合金5251制成的表面的平坦度，波纹和粗糙度进行了对切割头横向速度（在这种情况下考虑的性能测量）的影响的分析，以及改变的影响在频域处理的发射高频声发射信号的所选描述函数的质量因数。这是一种与常量不同的新方法，其中通常研究声发射信号的低频。所得结果证实了加工条件对所得切割的几何结构的清晰影响和发射应力波的注册值。通过使用所提出的高频声发射信号分析，可以准确地确定这种影响。另外，在给定的过程质量指示符和频域中的登记选择的所选声发射信号参数之间开发的统计依赖性模型允许基于在加工过程中发射的声发射信号来预测所获得的切割的表面纹理。

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