Preparation and experiment of magnetorheological polishing fluid in reciprocating magnetorheological polishing process

Xiu, Shichao; Ren-sheng, Wang; Sun, Baiwan; Liang, Ma; Song, Wanli

doi:10.1177/1045389x17698247

Cited by 34 publications

(19 citation statements)

References 28 publications

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“…However, when the rotation speed exceeded 700 rpm, a decreasing tendency emerged, as shown in Figure 13b. This was because the yield stress of the stiffened MR polishing fluid decreased and the chain structures were destroyed to different degrees at high rotation speeds [30], and so the restriction of abrasive particle movement by the CIP chains was weakened. Although abrasive particles cut the material more frequently, the probability of abrasive particles rolling on the internal surface of the tube also increased due to the decreased yield stress.…”

Section: Effect Of Rotation Speed On Surface Roughnessmentioning

confidence: 99%

Annular Surface Micromachining of Titanium Tubes Using a Magnetorheological Polishing Technique

Song

Peng

et al. 2020

Micromachines

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In this study, a novel magnetorheological (MR) polishing device under a compound magnetic field is designed to achieve microlevel polishing of the titanium tubes. The polishing process is realized by combining the rotation motion of the tube and the reciprocating linear motion of the polishing head. Two types of excitation equipment for generating an appropriate compound magnetic field are outlined. A series of experiments are conducted to systematically investigate the effect of compound magnetic field strength, rotation speed, and type and concentration of abrasive particles on the polishing performance delivered by the designed device. The experiments were carried out through controlling variables. Before and after the experiment, the surface roughness in the polished area of the workpiece is measured, and the influence of the independent variable on the polishing effect is judged by a changing rule of surface roughness so as to obtain a better parameter about compound magnetic field strength, concentration of abrasive particles, etc. It is shown from experimental results that diamond abrasive particles are appropriate for fine finishing the internal surface of the titanium-alloy tube. It is also identified that the polishing performance is excellent at high magnetic field strength, fast rotation speed, and high abrasive-particle concentration.

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Section: Effect Of Rotation Speed On Surface Roughnessmentioning

confidence: 99%

Annular Surface Micromachining of Titanium Tubes Using a Magnetorheological Polishing Technique

Song

Peng

et al. 2020

Micromachines

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“…When the electromagnet moves radially along the workpiece to its edge area, the formed polishing tool also moves there, and at this time the edge area of the workpiece is polished, as shown in Figure 1 b. Because of the workpiece only rotating in a fixed position, the magnetic polishing brush moves continuously with the electromagnet, which realizes that the electromagnet reciprocates for one cycle every time, and the workpiece surface is polished once in a full range with polishing tools [ 30 ]. Based on the principle shown in Figure 1 and the coverage of the magnetic line to the workpiece (the polishing brush was in fully contact and friction with the workpiece), the experimental setup used for the RMRP was developed as shown in Figure 2 .…”

Section: Mrr Model Of the Rmrpmentioning

confidence: 99%

Study on Material Removal Model by Reciprocating Magnetorheological Polishing

Wang¹,

Xiu

Sun

et al. 2021

Micromachines

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In this study, a new reciprocating magnetorheological polishing (RMRP) method for a flat workpiece was proposed. Based on the RMRP principle and Preston equation, the material removal rate (MRR) model of the RMRP as well as its normal polishing pressure model was established. On this basis, the effects of different technological parameters including workpiece rotation speed, eccentric wheel rotation speed and eccentricity on the MRR of the workpiece were investigated. The K9 optical flat glass was polished with the RMRP setup to verify the MRR model. The experimental results showed that the effect of workpiece rotation speed on the MRR was much greater than that of eccentric wheel rotation speed and eccentricity, and the MRR increased from 0.0115 ± 0.0012 to 0.0443 ± 0.0015 μm/min as workpiece rotation speed rose. The optimum surface roughness reduced to Ra 50.8 ± 1.2 from initial Ra 330.3 ± 1.6 nm when the technical parameters of the workpiece rotation speed of 300 rpm, the eccentric wheel rotation speed of 20 rpm and the eccentricity of 0.02 m were applied. The average relative errors between the theoretical and experimental values were 16.77%, 10.59% and 7.38%, respectively, according to the effects of workpiece rotation speed, eccentric wheel rotation speed and eccentricity on MRR.

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“…Various material removal processes are available to generate these ultraprecision surfaces. Many of these techniques are based on random and quasi-random generation process like grinding and lapping, chemical polishing, 1 chemo-mechanical polishing, 2 chemo-mechanical magneto-rheological finishing, 3, 4 magneto-rheological finishing, 5, 6 abrasive flow finishing, 7 magnetic abrasive flow finishing, etc. 8 However, these processes are not capable of controlling the size of the features precisely and can only improve surface quality, generate simple geometries and shapes.…”

Section: Introductionmentioning

confidence: 99%

Prediction of tool wear constants for diamond turn machining of CuBe

Sharma

Datta

Balasubramaniam

2020

Journal of Micromanufacturing

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While several studies in diamond turning of homogeneous materials like Cu, Al, and Si are well published, there is a lack of understanding about tool wear in case of heterogeneous materials like CuBe. Severity of the tool wear can be understood from the magnitude of the wear coefficients, and the magnitude of these coefficients is influenced by the wear mechanism. Hence, this study is aimed to calculate the wear coefficients from a known tool wear model in diamond turn machining of CuBe. Molecular dynamics simulation (MDS) results show that stress and temperature are responsible for increasing rate of tool wear. From the experimental results, change in the tool cutting edge radius due to wear was obtained and the temperature and stress for various a/r were found out using MDS. With these data, the wear coefficients, A & B, from a wear model for diamond turning were calculated. This methodology of using MDS to obtain stress and temperature for various a/ r wherein, values of r are obtained from a single machining trial on actual material, will be useful for calculating the wear coefficients for the combination of single crystal diamond tool with various work piece materials and their activation energies.

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Preparation and experiment of magnetorheological polishing fluid in reciprocating magnetorheological polishing process

Cited by 34 publications

References 28 publications

Annular Surface Micromachining of Titanium Tubes Using a Magnetorheological Polishing Technique

Annular Surface Micromachining of Titanium Tubes Using a Magnetorheological Polishing Technique

Study on Material Removal Model by Reciprocating Magnetorheological Polishing

Prediction of tool wear constants for diamond turn machining of CuBe

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