喷砂表面的多尺度分析与表征

发布时间：2018-12-17 06:08

【摘要】：目的对喷砂表面的复杂轮廓特征进行分析和表征,以选取能表征最佳工艺参数的三维粗糙度参数。方法以喷砂工作距离为变量对AISI 304L不锈钢试样进行喷砂处理,对喷砂处理后试样的表面形貌开展多尺度分析,选取5个评价尺度,每个评价尺度下采用12个常用的三维粗糙度参数进行表面形貌表征;分析各个粗糙度参数对于评价尺度的变化规律,同时进一步考虑喷砂工作距离对喷砂表面形貌的影响,在适宜评价尺度下建立粗糙度参数和工艺参数之间的线性回归模型。结果大部分三维粗糙度参数(Sku)的最优评价尺度均为80μm,在该评价尺度下,Sku与喷砂工作距离之间存在线性关系,且其线性相关系数最大;随着喷砂工作距离的增加,Sku随之增大,试样表面形貌的峰谷数量也随之增大。结论本次喷砂工艺实验的最优评价尺度为80μm,最优表面形貌表征参数为Sku,与普遍使用的Sa和Sq相比,Sku包含更多三维形貌信息,能更好地刻画喷砂工作距离对表面形貌的影响。
[Abstract]:Objective to analyze and characterize the complex profile features of sand blasting surface and to select three dimensional roughness parameters which can characterize the best process parameters. Methods the AISI 304L stainless steel sample was treated with sand blasting distance as variable. The surface morphology of the sample was analyzed by multi-scale analysis, and 5 evaluation scales were selected. At each evaluation scale, 12 commonly used 3D roughness parameters were used to characterize the surface morphology. The variation of roughness parameters on the evaluation scale is analyzed, and the influence of working distance of sand blasting on the surface morphology of sand blasting is considered, and a linear regression model between roughness parameters and process parameters is established under the appropriate evaluation scale. Results the optimal evaluation scale of most 3D roughness parameter (Sku) is 80 渭 m. Under this evaluation scale, there is a linear relationship between Sku and the working distance of sandblasting, and the linear correlation coefficient is the largest. With the increase of sand blast distance, Sku increases and the number of peaks and valleys of surface morphology increases. Conclusion the optimal evaluation scale of this sand blasting experiment is 80 渭 m, and the optimal surface morphology characterization parameter is Sku,. Compared with the commonly used Sa and Sq, Sku contains more 3D morphology information. It can better describe the effect of working distance of sand blasting on surface morphology.
【作者单位】：郑州大学机械工程学院;
【分类号】：TG174.4

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