Precision optics fabrication using magnetorheological finishing

Golini, Donald; Dumas, Paul; Kordonski, William; Hogan, S. J.; Jacobs, Stephen D.

doi:10.1364/oft.1998.omd.1

Cited by 11 publications

(11 citation statements)

References 1 publication

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“…MRF mainly acts on the magnetorheological liquid (MRL) through the magnetic field, and then acts on the non-magnetic abrasive to realize the finishing process. The principle is as follows: under the action of gradient magnetic field, the MRL will form a solid-like structure with higher yield strength, and the non-magnetic particles will form a flexible polishing tool by the solidification of MRL to achieve the micro removal of the surface [239].…”

Section: Magnetic Field Assisted Polishing Technologymentioning

confidence: 99%

Field-assisted machining of difficult-to-machine materials

Zhang,

Zheng,

Huang

et al. 2024

Int. J. Extrem. Manuf.

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Difficult-to-machine materials (DMMs) are extensively applied in critical fields such as aviation, national defense, biomedicine, and other key fields due to their excellent material properties. However, traditional machining technology is difficult to precisely machine DMMs due to poor surface quality and low processing efficiency. In recent years, as a new generation of machining technology, field-assisted machining (FAM) technology based on innovative principles such as laser heating, tool vibration, magnetic magnetization, and plasma modification provides a new solution for improving the machinability of DMMs. It is advantageous to prevent the shortcomings of traditional machining methods, and has become a hot topic of research in the domain of ultra-precision machining of DMMs. Many new methods and principles have been presented and investigated one after another, yet few researches have been analysed and summarized from a comprehensive standpoint. To fill this gap and understand the development trend of FAM, this study provides an important overview of FAM, covering different assisted machining methods, application effects, mechanism analysis, and equipment design. The current deficiencies and future challenges of FAM are summarized to lay the foundation for the further development of multi-field hybrid assisted and intelligent field-assisted machining technologies.

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Section: Magnetic Field Assisted Polishing Technologymentioning

confidence: 99%

Field-assisted machining of difficult-to-machine materials

Zhang,

Zheng,

Huang

et al. 2024

Int. J. Extrem. Manuf.

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“…Since then, all kinds of industrial applications have been developed, such as linear dampers, [ 4 ] rotary shaft dampers, [ 5 ] clutches, [ 6 ] flow control valves, [ 7 ] rotary brakes, [ 8 ] and polishing systems. [ 9 ]…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Highly Deformable Multilayer Magnetoactive Elastomers with Magnetically Soft Particles

et al. 2023

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Herein, a new highly deformable magnetoactive elastomeric material is developed. The elastomer is composed of a silicon‐based matrix and soft‐magnetic Fe microparticles. It presents a nonuniform multilayer internal structure, with highest particle concentration in one‐half of the thickness. These elastomers are produced in sheet and tubular formats, wherein multilayer distribution of the components is achieved by the gravitational and centrifugal force respectively. The study of the rheological properties shows a high change in the dynamic modulus of the elastomer in the presence of magnetic field, which is representative of a high magnetorheological effect. Regarding the deformability of the elastomer, to monitor the displacements and curvatures generated under the action of a magnetic field, an optical, noninvasive, and magnetic field‐insensitive system based on 3D stereoscopic technique is employed. Using this method, the digitization of the upper curved surface of the elastomer as a function of the applied magnetic field is obtained. From the digitized surfaces, the deformation of the material in response to a magnetic field is calculated, reaching deformations up to 23.7% at 207 kA m−1. Moreover, the deformation level is linearly variable and controllable by the strength of the applied magnetic field, allowing dynamic deformation of the material.

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“…When a magnetic field is applied, the magnetic particles in MR fluid orient in a systematic way as long as the forces being exerted are equal to those of gravity and drag. 1 A schematic illustration of the horizontal wheelbased MR fluid-based finishing process is shown in Figure 1. A ring-shaped permanent magnet mounted on the spindle of a CNC machine makes up a carrier wheel.…”

Section: Introductionmentioning

confidence: 99%

Research on the mechanism of particles separation in magnetorheological fluid-based finishing process

Dubey

Sidpara

Lakkaraju

2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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Magnetorheological fluid-based finishing is one of the recognized techniques for precisely finishing of a variety of components. Material removal depends largely on velocity and compression of the magnetorheological (MR) fluid ribbon when it interacts with the workpiece. This article studies the throwing of magnetic and abrasive particles during carrier wheel rotation. Theoretically computed centrifugal and magnetic forces are balanced against each other to determine the speed at which these particles are ejected from the MR fluid. The results of experiments at various carrier wheel speeds show the reduction of MR fluid ribbon thickness at higher wheel speed due to throwing of MR fluid. As a result of particle separation from the MR fluid at high rotational speed. As the carrier wheel speed increases, surface roughness decreases initially and then increases. There is good agreement between theoretical and actual results for the spindle speed at which magnetic particles depart the MR fluid ribbon.

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Precision optics fabrication using magnetorheological finishing

Cited by 11 publications

References 1 publication

Field-assisted machining of difficult-to-machine materials

Field-assisted machining of difficult-to-machine materials

Synthesis and Characterization of Highly Deformable Multilayer Magnetoactive Elastomers with Magnetically Soft Particles

Research on the mechanism of particles separation in magnetorheological fluid-based finishing process

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