Sutowska Marzena, Kapłonek Wojciech, Pimenov Danil Yurievich, Gupta Munish Kumar, Mia Mozammel, Sharma Shubham
Department of Production Engineering, Faculty of Mechanical Engineering, Koszalin University of Technology, Racławicka 15-17, 75-620 Koszalin, Poland.
Department of Automated Mechanical Engineering, South Ural State University, Lenin Prosp. 76, 454080 Chelyabinsk, Russia.
Materials (Basel). 2020 Sep 25;13(19):4277. doi: 10.3390/ma13194277.
The main innovation of this article is the determination of the impact of curvature of a shape cut out in a brittle material using an abrasive water jet (AWJ) process as an important factor of the machined surfaces. The curvature of a shape, resulting from the size of the radius of the cutting head trajectory, is one of the key requirements necessary for ensuring the required surface quality of materials shaped by the abrasive water jet process, but very few studies have been carried out in this regard. An important goal of the experimental studies carried out here and presented in this work was to determine its influence on the quality of the inner and outer surfaces of the cutting kerf. This goal was accomplished by cutting the shape of a spiral in soda-lime glass. For such a shape, the effect of radius of the trajectory of the cutting head on selected parameters of the surface texture of the inner surface of the cutting kerf (IS) and the outer surface of the cutting kerf (OS) was studied. The obtained results of the experimental studies confirmed that the effect of the curvature of the cut shape is important from the point of view of the efficiency of the glass-based brittle material-cutting process using AWJ. Analyses of the surface textures of the areas located in the upper part of the inner and outer surfaces separated by the use of AWJ machining showed that the OS surfaces are characterized by worse technological quality compared with IS surfaces. Differences in the total height of surface irregularities (given by St amplitude parameter), determined on the basis of the obtained results of the measurements of both surfaces of the cutting kerf, were as follows: ΔSt = 0.6 μm; ΔSt = 1 μm; ΔSt = 1.3 μm. The analysis of values measured in areas located in the more sensitive zone of influence of the AWJ outflow proved that the total height of irregularities (St) of the OS was higher. Differences in the total heights of irregularities for inner and outer surfaces of the cutting kerf were as follows: ΔSt = 2.1 μm; ΔSt = 3 μm; ΔSt = 14.1 μm, respectively. The maximum difference in the total heights of irregularities (St), existing between the surfaces considered in a special case (radius 15 mm), was almost 20%, which should be a sufficient condition for planning cutting operations, so as to ensure the workpiece is shaped mainly by internal surfaces.
本文的主要创新点在于确定了使用磨料水射流（AWJ）工艺切割脆性材料时，所切割形状的曲率作为加工表面的一个重要因素所产生的影响。由切割头轨迹半径大小导致的形状曲率，是确保磨料水射流工艺成型材料达到所需表面质量的关键要求之一，但在这方面开展的研究很少。本文进行并展示的实验研究的一个重要目标是确定其对切割缝内、外表面质量的影响。通过在钠钙玻璃中切割螺旋形状实现了这一目标。对于这样的形状，研究了切割头轨迹半径对切割缝内表面（IS）和切割缝外表面（OS）的表面纹理选定参数的影响。实验研究所得结果证实，从使用AWJ切割玻璃基脆性材料工艺的效率角度来看，切割形状的曲率影响很重要。对通过AWJ加工分隔开的内、外表面上部区域的表面纹理分析表明，与IS表面相比，OS表面的工艺质量较差。根据切割缝两个表面的测量结果确定的表面不规则总高度（由St幅度参数给出）差异如下：ΔSt = 0.6μm；ΔSt = 1μm；ΔSt = 1.3μm。对位于AWJ流出更敏感影响区域的测量值分析表明，OS的不规则总高度（St）更高。切割缝内、外表面不规则总高度差异如下：分别为ΔSt = 2.1μm；ΔSt = 3μm；ΔSt = 14.1μm。在特殊情况（半径15mm）下考虑的表面之间存在的不规则总高度（St）的最大差异几乎为20%，这应该是规划切割操作的充分条件，以便确保工件主要由内表面成型。
