Study on magnetic abrasive finishing of the inner surface of Ni–Ti alloy cardiovascular stents tube

Deng, Ying; Zhao, Yugang; Zhao, Guoyong; Gao, Yuewu; Liu, Guangxin; Wang, Ke

doi:10.1007/s00170-021-08074-3

Cited by 11 publications

(7 citation statements)

References 18 publications

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“…This reduced friction and heat generation between the bullet and gun barrel. Deng et al [42] used MAF to remove surface defects such as cracks and scratches from the internal surface of Ni-Ti alloy tube, which is utilized in the implementation of cardiovascular stent tubes.…”

Section: Plane Maf Setups Used In Literaturementioning

confidence: 99%

“…Apart from flat surfaces, MAF process can also be applied to finish cylindrical workpieces such as external and internal surfaces, i.e. flat disks, internal surfaces of pipes, cylindrical rods, bent tubes made of steel, superalloys, and ceramic [41,42]. In the MAF process, a brush made up of ferromagnetic and abrasive particles, which are flexible, is formed.…”

Section: Introductionmentioning

confidence: 99%

“…They reported improved mechanical properties of yield strength of 1147 MPa, an ultimate tensile strength of 1334 MPa, and an elongation of 22.9%. Deng et al [42] used MAF to finish the inner surface of ultra-fine Ni-Ti alloy tubes utilized for cardiovascular stent manufacturing. They reported effective removal of surface defects and significant improvement in surface roughness from 0.75 to 0.08 μm.…”

Section: Introductionmentioning

confidence: 99%

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Recent advancements in magnetic abrasive finishing: a critical review

Kumar,

Komma

2024

Eng. Res. Express

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Many engineering applications require components with a good surface finish. It is difficult to get the surface finish in the micro/nano level range with conventional finishing processes for materials such as super alloys, composites, and ceramics. Magnetic abrasive finishing (MAF) is one of the processes for achieving superior surface finish. However, the processes efficiency is affected by its operational variables. Even a slight change in a processing parameter may lead to dimensional inaccuracies and poor surface quality of the workpiece. In this paper, recent trends in the magnetic abrasive finishing process are presented along with a critical review. The review includes MAF principles, tools, hybridization, modeling, and simulation of the process. Apart from plane MAF, the principle of MAF for cylindrical workpieces, the mechanism of material removal and the effect of different types of abrasives are also discussed. Various machine tools used for MAF of plane and cylindrical workpieces for external and internal surfaces are also discussed. In hybridization, different processes combined with MAF, like ultrasonic-assisted MAF, chemo-assisted MAF, and electrochemical-assisted MAF, etc., are discussed to increase material removal rate and obtain surface finish at the micro/nano level. The paper also covers mathematical and statistical modeling, simulation, and optimization techniques to predict and optimize the set of input process parameters. Lastly, challenges and conclusions of the MAF process are presented.

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Section: Plane Maf Setups Used In Literaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent advancements in magnetic abrasive finishing: a critical review

Kumar,

Komma

2024

Eng. Res. Express

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“…In the current work, we have investigated the removal of defective layers from the inner walls of cardiovascular stents using magnetic particle finishing, and the magnetic abrasives used were obtained by atomization [ 49 , 50 ]. As reviewed earlier, the disadvantage of the atomization method when preparing magnetic abrasives from expensive hard abrasives such as CBN and PCD is that there is serious waste, and the available grain size does not exceed 50%.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Spherical Al2O3 Magnetic Abrasive Prepared by Novel Method for Finishing of the Inner Surface of Cobalt–Chromium Alloy Cardiovascular Stents Tube

Liu

Zhao

et al. 2023

Micromachines

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In this investigation, spherical Al2O3 magnetic abrasive particles (MAPs) were used to polish the inner surface of ultra-fine long cobalt–chromium alloy cardiovascular stent tubes. The magnetic abrasives were prepared by combining plasma molten metal powder and hard abrasives, and the magnetic abrasives prepared by this new method are characterized by high sphericity, narrow particle size distribution range, long life, and good economic value. Firstly, the spherical Al2O3 magnetic abrasives were prepared by the new method; secondly, the polishing machine for the inner surface of the ultra-fine long cardiovascular stent tubes was developed; finally, the influence laws of spindle speed, magnetic pole speed, MAP filling quantities, the magnetic pole gap on the surface roughness (Ra), and the removal thickness (RT) of tubes were investigated. The results showed that the prepared Al2O3 magnetic abrasives were spherical in shape, and their superficial layer was tightly bound with Al2O3 hard abrasives with sharp cutting; the use of spherical Al2O3 magnetic abrasives could achieve the polishing of the inner surface of ultra-fine cobalt–chromium alloy cardiovascular bracket tubes, and after processing, the inner surface roughness (Ra) of the tubes decreased from 0.337 µm to 0.09 µm and had an RT of 5.106 µm.

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“…Since the magnetic field has penetrating characteristics, the MAF process can be used to not only finish the outer surface of the workpiece, but also its inner surface [4][5][6][7]. Shinmura and Yamaguchi firstly proposed using MAF technology for the internal surface finishing process of a stainless-steel tube in 1995, and the experimental results implied that MAF technology was able to achieve uniform internal surface finishing process for tube workpieces [8].…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Abrasive Finishing Process with an Auxiliary Magnetic Machining Tool for the Internal Surface Finishing of a Thick-Walled Tube

Yang

et al. 2022

Machines

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This paper proposes a novel magnetic abrasive finishing (MAF) process that uses an auxiliary magnetic machining tool for the internal surface finishing of a thick-walled tube. The auxiliary magnetic machining tool and external poles form a closed magnetic field circuit. Thus, a stronger magnetic force can be generated during the process. In the current study, we focus on analyzing the distribution of the magnetic field and magnetic flux density and investigating the finishing characteristics of a mixed magnetic abrasive finishing process and speed of relative revolutions. Based on the finishing characteristics, we also conduct a stage-by-stage finishing process by changing the combinations of the mixed magnetic abrasive finishing process. The finishing quality of the internal surface was mainly evaluated by the measured roundness and surface roughness. The experimental results show that the roundness and surface roughness Ra are affected when the total amount of WA abrasive and iron powder is too much; a better surface roughness could be obtained when the difference in the speed of relative revolutions is considerable, but the roundness is the worst. Furthermore, the original roundness measurement of 270 µm can reach 10 µm, and the surface roughness Ra can increase from an original surface roughness of 4.1 µm to reach 10 nm after 105 min of the stage-by-stage finishing process.

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Study on magnetic abrasive finishing of the inner surface of Ni–Ti alloy cardiovascular stents tube

Cited by 11 publications

References 18 publications

Recent advancements in magnetic abrasive finishing: a critical review

Recent advancements in magnetic abrasive finishing: a critical review

Investigation of Spherical Al2O3 Magnetic Abrasive Prepared by Novel Method for Finishing of the Inner Surface of Cobalt–Chromium Alloy Cardiovascular Stents Tube

A Magnetic Abrasive Finishing Process with an Auxiliary Magnetic Machining Tool for the Internal Surface Finishing of a Thick-Walled Tube

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