Experimental Study on Magnetorheological (MR) Jet Polishing of Mould Free Surface

Lu, Chong Da; Wu, Meng; Wen, Dong Hui; Chai, Guozhong

doi:10.4028/www.scientific.net/kem.500.287

Cited by 8 publications

(4 citation statements)

References 8 publications

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“…It was also established that high precision surfaces can be manufactured by MJP with a roughness of <1 nm and in a range of materials, including glasses, single crystals, advanced ceramics, and metals. This technique offers a versatile solution for conformal optic imaging systems [97]. Numerous experimental studies have shown that the jet velocity, angle of impact, jet pressure, nozzle diameters, machining time, and magnetic field strength mainly affect the processing effect of MJP.…”

Section: Effect Of Processing Techniquementioning

confidence: 99%

A Review on Magnetorheological Jet Polishing Technique for Microstructured Functional Surfaces

Song

Lin

et al. 2022

Lubricants

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The magnetorheological jet polishing (MJP) technique, as a revolutionary flexible contact polishing approach, is exceptionally suitable for the smooth and ultra-smooth machining of functional surfaces with tiny or microstructures due to the following essential advantages. Machine tool accuracy is not required and there is nearly no tool wear in addition to high polishing efficiency, minimal surface damage, great surface shape adaptation, superior material removal process selectivity, and so on. This work examines the machining mechanism, the development of machining devices, and the optimization of the process parameters in MJP. This review also covers the MJP technique’s existing limitations and opportunities.

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Section: Effect Of Processing Techniquementioning

confidence: 99%

A Review on Magnetorheological Jet Polishing Technique for Microstructured Functional Surfaces

Song

Lin

et al. 2022

Lubricants

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“…The former entails physical and chemical reactions and mainly includes ion beam polishing [4,5] and laser polishing [6,7]. The latter entails mechanical action between the abrasive particles and the surface and mainly includes magnetorheological nishing (MRF) [9][10][11][12], ultrasonic-assisted polishing [14,15], bonnet polishing [17,18], and jet-assisted polishing [20][21][22]. Hänsel et al [4] were based on the dwell time algorithm and proved that, after global polishing of an aspheric silicon lens with an aperture of 135 mm by ion beam, the surface shape error was reduced from 4.5 to 0.56 nm.…”

Section: Introductionmentioning

confidence: 99%

“…By deploying the abrasive jet technology, Mandal et al [20] explored the in uence of various process parameters on the processing characteristics and obtained a maximum MRR of 1.08 g/min through optimization. Lu et al [21] used the magnetorheological jet polishing technology to spray the ceramic mold, and SR converged from 812nm to 88nm. Barletta et al [22] utilized the technology of uidized-bedassisted abrasive jet polishing Inconel 718 curved parts and studied the in uence of several factors, such as abrasive size and jet pressure, on its machining quality, which reduced SR to 0.1 µm, signi cantly improving the shape accuracy of the surface was improved.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on weak magnetization-enhanced force-rheological polishing of SiC mold

Dongdong

Huang

Yang

et al. 2023

Int J Adv Manuf Technol

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To investigate the in uence of weak magnetization enhanced force rheological polishing (WMEFRP) parameters on the surface quality of small aspheric SiC mold, a magnetic shear thickening uid (MSTF) containing shear thickening uid (STF), Al 2 O 3 particles, and carbonyl iron powder particles was developed. Furthermore, the polishing characteristics and stability of the method were analyzed through rheological tests and magnetic eld simulation. Orthogonal experiments were carried out on a small aspheric SiC mold using a ve-axis machining center. The in uence of spindle speed, polishing clearance, abrasive particle size, and other factors on material removal rate (MRR), surface morphology, surface roughness (SR), and subsurface damage (SSD) depth was explored. The results showed that MRR and SSD depth increased with spindle speed, whereas SR rst decreased and then increased. Polishing clearance had a signi cant negative correlation effect on MRR, SR, and SSD depth, whereas abrasive particle size had a weak positive correlation effect on them. The parameter optimization method based on multi-objective matrix was used to evaluate the in uence weight of MRR, SR, and SSD depth on the orthogonal test results. The optimal scheme was determined as follows: the spindle speed was 720 rpm, the polishing gap was 0.5 mm, and the particle size was 3 µm. The veri cation test was carried out by using the optimal scheme. The results showed that the SR and SSD depths were considerably reduced, and the surface/subsurface quality was considerably improved. This evaluation method could meet the technical requirements of high e ciency and high surface/subsurface quality for the polishing of smallaperture aspheric SiC mold.

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“…Moreover, these transformations are reversible and rapid. MRFs are widely used in machinery, construction, automobile and other fields because of these special properties [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the transmission characteristics of high-torque magnetorheological brakes

Wang

Liu

Królczyk

et al. 2019

Smart Mater. Struct.

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This paper aims to investigate the effect of temperature on the transmission characteristics of high-torque magnetorheological (MR) brakes by theoretically analyzing a disc brake, the pressure characteristics of the magnetorheological fluid (MRF) in axial, and the heat dissipation of an MR brake. A high-torque squeezing MRF brake with a water cooling method for heat dissipation is designed and a temperature-torque performance experimental system is established to conduct the experiments. The experimental results indicate that the high-torque squeezing MRF brake exhibits workable pressure characteristics. Meanwhile, the braking torque presents a variation trend that is initially increasing then decreasing when the temperature increases from 25 °C to 150 °C. The magnitude of decrease is approximately 210 N m, which decreases from 1800 to 1590 N m. Moreover, the temperature of the MRF presents an almost linear increase at different slip powers and the rate of temperature rise increases with an increase in slip power. The findings of this study prove that an effective cooling method can be vital to the stable operation of the high-torque MR brakes.

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Experimental Study on Magnetorheological (MR) Jet Polishing of Mould Free Surface

Cited by 8 publications

References 8 publications

A Review on Magnetorheological Jet Polishing Technique for Microstructured Functional Surfaces

A Review on Magnetorheological Jet Polishing Technique for Microstructured Functional Surfaces

Experimental investigations on weak magnetization-enhanced force-rheological polishing of SiC mold

Effect of temperature on the transmission characteristics of high-torque magnetorheological brakes

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