Analysis and improvement of the pad wear profile in fixed abrasive polishing

Nguyen, NhatTan; Zhong, Zhang; Tian, Yebing

doi:10.1007/s00170-015-8025-y

Cited by 11 publications

(5 citation statements)

References 12 publications

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“…The standard sample, with volume ratios of SiC abrasive particles 20%, 35%, and 50% respectively, was selected to form two groups of double-layer standard samples, which were also used for experimental verification. The Young's modulus of each group and the corresponding equivalent Young's modulus calculated by Equation (4) are given in Table 6. In addition, the stress detection system is used, which consists of a JLBS-M2 pressure sensor (0.1% FS) and an MCK-Z-I intelligent display controller.…”

Section: Experimental Preparationmentioning

confidence: 99%

“…Material removal uniformity during lapping and polishing process has been a focus of research for years owing to its significant effects on processing efficiency and surface quality. [1][2][3][4][5][6][7] Preston equation (material removal rate [MRR] = KPV) has a wide range of applications in material processing, [8][9][10] where P is the contact stress, V is the relative velocity, and K is a coefficient related to the processing parameters. In terms of Preston equation, the non-uniformity of the distribution of P and V is the important source for the nonuniformity of MRR.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contact stress prediction model of double‐layer elastomer with functionally graded and composite structure

et al. 2021

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As hard and brittle materials are widely used in the modern industry, it is essential to effectively achieve uniform material removal. In the present study, a contact stress prediction model for double-layer elastomer under uniform displacement load was proposed. It aims to predict the contact stress distribution based on the structure size and material parameters of the double-layer elastomer and optimize the relevant parameters to improve the uniformity of material removal. The functionally graded and composite structured lapping and polishing plate (FG/CS-LPP) was developed by mixing abrasive particles and rubber with different mass ratios to get different Young's moduli. Through optical microscope, the surface morphology was observed, and the mechanism of Young's modulus gradient change was demonstrated. After numerical simulation analysis, the effect of Young's modulus fluctuation on contact stress distribution trend was evaluated. As for the contact stress prediction model, an equivalent Young's modulus model and compensation function H(z) was introduced to simplify the analytical process. Further, the obtained equivalent equation was verified by simulations and experiments with an average percentage deviation of~2% and~6%, respectively. By fitting calculated and simulated values with a deviation of less than 5%, the compensation function H(z) was established. Finally, the contact stress prediction model was obtained and validated by simulations and experiments, the percentage deviation is less than 13%. Accordingly, the contact stress prediction model can provide a theoretical basis for FG/CS-LPP to achieve uniform material removal.

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Section: Experimental Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contact stress prediction model of double‐layer elastomer with functionally graded and composite structure

et al. 2021

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“…On the contrary, the fixed abrasive polishing (FAP) process has a higher material removal efficiency than the free abrasive polishing process [19][20][21]. Therefore, it can be used to polish hard brittle materials, such as silicon wafers, glass, and ceramics [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Development of a New Finishing Process Combining a Fixed Abrasive Polishing with Magnetic Abrasive Finishing Process

et al. 2021

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High quality, highly efficient finishing processes are required for finishing difficult-to-machine materials. Magnetic abrasive finishing (MAF) process is a finishing method that can obtain a high accuracy surface using fine magnetic particles and abrasive particles, but has poor finishing efficiency. On the contrary, fixed abrasive polishing (FAP) is a polishing process can obtain high material removal efficiency but often cannot provide a high-quality surface at the nano-scale. Therefore, this work proposes a new finishing process, which combines the magnetic abrasive finishing process and the fixed abrasive polishing process (MAF-FAP). To verify the proposed methodology, a finishing device was developed and finishing experiments on alumina ceramic plates were performed. Furthermore, the mechanism of the MAF-FAP process was investigated. In addition, the influence of process parameters on finishing characteristics is discussed. According to the experimental results, this process can achieve high-efficiency finishing of brittle hard materials (alumina ceramics) and can obtain nano-scale surfaces. The surface roughness of the alumina ceramic plate is improved from 202.11 nm Ra to 3.67 nm Ra within 30 min.

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“…However, little research has dealt with the variation of the pad characteristics due to pad wear [4]. One of the most important factors that have significant effects on the uniformity of the polished surface is the pad wear profile [5]. Non-uniformity of pad surface topography affects the contact area and friction force between the pad and wafer surface [6].…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Model for the Analysis of Disc Brake Using the Finite Element Method in Frictional Contact

Belhocine

Abdullah

2020

Multiscale Sci. Eng.

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The braking phenomenon is an aspect of vehicle stopping performance where with kinetic energy due to speed of the vehicle is transformed to thermal energy via the friction between the brake disc and its pads. In our work, we presented numerical modeling using ANSYS software adapted in the finite element method, to follow the evolution of the global temperatures for the two types of brake discs, full and ventilated disc during braking scenario. Also, numerical simulation of the transient thermal and the static structural analysis were performed sequentially, with coupled thermo-structural method. Numerical procedure of calculation relies on important steps such that the Computational Fluid Dynamics and thermal analysis have been well illustrated in 3D, showing the effects of heat distribution over the brake disc. This CFD approach helped in the calculation of values of the heat transfer coefficients (h) that have been exploited in 3D transient evolution of the brake disc temperatures. Three different brake disc materials were tested and comparative analysis of the results was conducted in order, to derive the one with the best thermal behavior. Finally, the resolution of the coupled thermomechanical model allows us to visualize other important results of this research such as; the deformations, and the equivalent Von Mises stress of the disc, as well as the contact pressure of brake pads. Following the analysis of the results obtained, we draw several conclusions from this investigation. The choice allowed us to deliver the excellent rotor design to ensure and guarantee the good braking performance of the vehicles.

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Analysis and improvement of the pad wear profile in fixed abrasive polishing

Cited by 11 publications

References 12 publications

Contact stress prediction model of double‐layer elastomer with functionally graded and composite structure

Contact stress prediction model of double‐layer elastomer with functionally graded and composite structure

Development of a New Finishing Process Combining a Fixed Abrasive Polishing with Magnetic Abrasive Finishing Process

Thermomechanical Model for the Analysis of Disc Brake Using the Finite Element Method in Frictional Contact

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