Experiment and simulation analysis on the mechanism of the spindle barrel finishing

Wang, Na; Zhao, Tingting; Yang, Shengqiang; Li, Wenhui; Zhao, Kai

doi:10.1007/s00170-020-05609-y

Cited by 17 publications

(10 citation statements)

References 17 publications

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“…Kuan filtering, Lee filtering, and Frost filtering use the local statistical properties of the image to calculate the degree of variation of the window and use an all-pass filter in regions with large coefficients of variation and a low-pass filter in regions with small coefficients of variation. This results in improved edge retention and good denoising but is less suitable for complex texture images [8]. The selection of the median filter window size is most important when the window is large and the denoising ability is strong, but the detail information is lost seriously; when the window is small, the smoothing ability is poor, the denoising effect is not satisfactory, and the edge information is well maintained [9].…”

Section: Related Workmentioning

confidence: 99%

“…Equation ( 7) is called the second-order wavelet transform of the gðx, yÞ, and the modulus of the gradient vector at scale k is shown in Equation (8). The direction of the gradient vector is the direction of the local maximum of the gradient modulus, so the edge points of the image can be obtained along the direction of the gradient vector of the detected local maximum of the wavelet transform modulus [20].…”

Section: Wavelet Analysis-based Texture Analysis Of Ceramic Surface Imagesmentioning

confidence: 99%

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Wavelet Analysis-Based Texture Analysis of Ceramic Surface Images

Liu

Zhou

Yang

2021

Advances in Mathematical Physics

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This paper is conducted to explore a new characterization method as a supplement to the traditional roughness characterization. The main research includes the extraction and evaluation of damage features of ceramic surface morphology by applying wavelet methods, the extraction of damage features in surface contours by using wavelet analysis, and the quantitative evaluation of damage degree by using damage rate and damage mean spacing. By comparing various fractal dimension calculation methods, a fractal dimension method suitable for calculating the ceramic surface was selected, and the fractal method was used to describe the ceramic surface topography as a whole. By comparing different methods of calculating the fractal dimension and further verifying them with the measured three-dimensional morphology, it is found that the vibrational method is more suitable for calculating the fractal dimension of ceramic surface, and its calculation accuracy is investigated, and the results show that the method is a reliable one. Based on the fractal theory, a mathematical model of surface wear and surface sealing was established. Further study of the model shows that the surface with a large fractal dimension has a good sealing effect; the surface corresponding to the best fractal dimension is the most resistant to wear. The fractal method can characterize the complexity of the surface profile as a whole. The wavelet method can describe the ceramic surface profile from a local perspective, and the combination of the two methods can characterize the ceramic surface well. Finally, the experimental device of the ceramic surface defect detection system is constructed, and the joint debugging of hardware and software is completed. Under different light source intensities, ceramic image samples are collected, and the accuracy detection experiments of sample defective edges are conducted, and the results show that the light source has a small impact on the accuracy of ceramic defective edge detection. The results show that the light source has more influence on the accuracy of scratch detection. The results show that the system constructed in this thesis has good applicability for different ceramic sample detection.

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Section: Related Workmentioning

confidence: 99%

Section: Wavelet Analysis-based Texture Analysis Of Ceramic Surface Imagesmentioning

confidence: 99%

Wavelet Analysis-Based Texture Analysis of Ceramic Surface Images

Liu

Zhou

Yang

2021

Advances in Mathematical Physics

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“…Na et al [23] worked on the effect of speed and time in abrasive centrifugal barrel finishing (ACBF) on the roughness of stainless steel parts. They found that surface roughness decreased by 70% at 60 rpm, and no significant improvement was observed for longer process times.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive investigation of abrasive barrel finishing on hardness and manufacturability of laser-based powder bed fusion hollow components

Khorasani

Ghasemi

Farabi

et al. 2022

Int J Adv Manuf Technol

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One of the main issues of laser-based powder bed fusion (LB-PBF) parts is surface quality and dimensional deviations, which require post-processing. Conventional post-processing such as turning and milling cannot machine internal surfaces and therefore is not suitable for hollow components. In this paper, Ti–6Al–4 V components with different hollow shapes were printed by LB-PBF and post-processed by centrifugal barrel finishing (CBF). Samples were printed based on Taguchi L18 design of experiments (DoE) on the (L18: 21 × 33) matrix and polished in abrasive solution by porcelain triangular media 2 × 2 mm. The effect of process parameters including rotation direction, speed, time and volumetric percentage of abrasive on hardness and manufacturability, including surface quality, material removal rate (MRR) and dimensional deviation, are discussed. The novelty of this work is the application of this process to clean both the internal and external surfaces of LB-PBF parts, where previously it has only been investigated for external surfaces. This paper scrutinized the performance of the CBF on internal geometries, and it was shown for the size of the investigated components, the hexagonal hollow achieved the highest maximum removal rate over the square and circular hollows. In addition, the effect of CBF on plastic deformation and microstructural characterization has been investigated to find the effect of this process on work hardening. The results of this study also show that the rotational speed and the volumetric percentage of the abrasive directly drive the MRR. A higher rotational speed increases the slope of the sliding path and the sliding speed between printed parts and abrasive media, which causes higher cutting and grinding, MRR and media wear rate.

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“…Li et al 18 determined the displacement variation of the media and the impact velocity of the media on workpieces in the mass finishing process via a charge-coupled device laser displacement sensor. Na et al 19 utilized the Hertz–Mindlin model with an Archard wear contact model in DEM simulation for spindle barrel finishing to evaluate the motion trajectory of the roller-grinding media during the spindle-type barrel finishing process. The process information involving the working time, part density distribution, and media velocity gradient can be calculated from the achieved trajectories to analyze the total sliding and finishing efficiency.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the surface integrity of crankshaft by barrel finishing

Chang

Yang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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With the advancement of processing technology, the surface quality of crankshafts has become very demanding, especially in locations with severe friction and wear, such as the main shaft and connecting rod journals. Barrel finishing technology is widely applicable to the surface processes of large- and medium-sized parts as a typical free-grinding processing method with the characteristics of low processing cost, high processing efficiency, and simple processing equipment. In this study, a horizontal spindle barrel finishing machine is applied to the crankshaft parts. The surface integrity of the crankshaft is systematically evaluated before and after the finishing processing. The experimental results show that the surface integrity of the crankshaft is significantly improved after the finishing processing, which further improves the wear resistance of the part surface and increases the bearing capacity.

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Experiment and simulation analysis on the mechanism of the spindle barrel finishing

Cited by 17 publications

References 17 publications

Wavelet Analysis-Based Texture Analysis of Ceramic Surface Images

Wavelet Analysis-Based Texture Analysis of Ceramic Surface Images

A comprehensive investigation of abrasive barrel finishing on hardness and manufacturability of laser-based powder bed fusion hollow components

Investigation into the surface integrity of crankshaft by barrel finishing

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