Optimizing process parameters of in-situ laser assisted cutting of glass–ceramic by applying hybrid machine learning models

Wei, Jiachen; He, Wenbin; Lin, Chuangting; Zhang, Jianguo; Chen, Xiao; Xiao, Junfeng; Xu, Jianfeng

doi:10.1016/j.aei.2024.102590

Advanced Engineering Informatics

2024

DOI: 10.1016/j.aei.2024.102590

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Optimizing process parameters of in-situ laser assisted cutting of glass–ceramic by applying hybrid machine learning models

Jiachen Wei,

Wenbin He,

Chuangting Lin

et al.

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Cited by 3 publications

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Surface Structure Formation in Plasma Cutting of Aluminum and Titanium Alloys Using Direct Current Straight and Reverse Polarity

Sidorov,

Grinenko,

Chumaevskii

et al. 2024

Phys Mesomech

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The structural features and phase composition are examined in near-surface layers of specimens of Al-Mg, Al-Cu-Mg alloys and commercially pure titanium obtained by plasma cutting using direct current straight polarity (DCSP) and direct current reverse polarity (DCRP). It is found that the flows of molten metal ejected by the gas stream from the cut cavity during cutting form the fusion and heat-affected zones, whose structural morphology, phase composition, and thickness depend on both the selected material and the cutting mode. The fusion zone is thicker in specimens cut using DCRP than in those cut with DCSP. The thickness of the adjacent heat-affected zone is also the largest in the mode that provides a thicker fused layer. Aluminum alloy specimens cut in ambient air are characterized by the presence of oxygen in the near-surface layers. The lowest degree of oxidation is observed in Al-Mg alloy. Oxygen penetrates into the fused layer to a depth of 350–500 μm in Al-Cu-Mg and up to 200–250 μm in Al-Mg alloy. In titanium alloy, the thickness of oxide layers does not exceed 100–150 μm during straight polarity cutting and 200–250 μm during reverse polarity cutting. A thin brittle layer of TiO and TiO2 oxides is formed on the titanium alloy surface. It is shown that the generation of “water mist” around the plasma jet when cutting materials of all types with DCRP leads to a more intensive oxidation of metal, less thermal effect on the material, and reduced roughness of the cut face.

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Surface Structure Formation in Plasma Cutting of Aluminum and Titanium Alloys Using Direct Current Straight and Reverse Polarity

Sidorov,

Grinenko,

Chumaevskii

et al. 2024

Phys Mesomech

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Comprehensive Review on Research Status and Progress in Precision Grinding and Machining of BK7 Glasses

Yang,

Zhang,

Wei

et al. 2024

Micromachines

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BK7 glass, with its outstanding mechanical strength and optical performance, plays a crucial role in many cutting-edge technological fields and has become an indispensable and important material. These fields have extremely high requirements for the surface quality of BK7 glass, and any small defects or losses may affect its optical performance and stability. However, as a hard and brittle material, the processing of BK7 glass is extremely challenging, requiring precise control of machining parameters to avoid material fracture or excessive defects. Therefore, how to obtain the required surface quality with lower cost machining techniques has always been the focus of researchers. This article introduces the properties, application background, machining methods, material removal mechanism, and surface and subsurface damage of optical glass BK7 material. Finally, scientific predictions and prospects are made for future development trends and directions for improvement of BK7 glass machining.

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Surface Structure Formation in Plasma Cutting of Aluminum and Titanium Alloys Using Direct Current Straight and Reverse Polarity

SIDOROV,

GRINENKO,

CHUMAEVSKII

et al. 2024

View full text Add to dashboard Cite

The structural features and phase composition were examined in near-surface layers in samples of Al-Mg, Al-Cu-Mg alloys and commercially pure titanium obtained by plasma cutting using direct current straight polarity (DCSP) and direct current reverse polarity (DCRP). It was found that the flows of molten metal carried away by the gas stream from the cut cavity during cutting form molten and heat affected zones, whose structural morphology, phase composition and thickness depend on both the selected material and the cutting mode. The thickness of the molten zone is larger for samples cut using DCRP than for those cut with DCSP. The thickness of the adjacent heat affected zone is also the greatest under conditions that provide a large thickness of the fused layer. Aluminum alloy samples cut in ambient air are characterized by the presence of oxygen in the near-surface layers. The lowest degree of oxidation is observed in Al-Mg alloy. Oxygen penetrates into the fused layer to a depth of 350-500 μm in Al-Cu-Mg and up to 200-250 μm in Al-Mg alloy. In titanium alloy, the thickness of the oxide layers does not exceed 100-150 μm when cutting with DCSP and 200-250 μm when cutting with DCRP. A thin brittle layer of TiO and TiO2 oxides is formed on the titanium alloy surface. It was shown that the release of “water mist” around the plasma jet when cutting materials of all types with DCRP leads to more intense oxidation of metal, less thermal effect on the material, and reduced roughness of the cut surface.

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Optimizing process parameters of in-situ laser assisted cutting of glass–ceramic by applying hybrid machine learning models

Cited by 3 publications

References 47 publications

Surface Structure Formation in Plasma Cutting of Aluminum and Titanium Alloys Using Direct Current Straight and Reverse Polarity

Surface Structure Formation in Plasma Cutting of Aluminum and Titanium Alloys Using Direct Current Straight and Reverse Polarity

Comprehensive Review on Research Status and Progress in Precision Grinding and Machining of BK7 Glasses

Surface Structure Formation in Plasma Cutting of Aluminum and Titanium Alloys Using Direct Current Straight and Reverse Polarity

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