A novel approach of magnetorheological abrasive fluid finishing with swirlingassisted inlet flow. A new finishing process named as rotational magnetorheological abrasive flow finishing rmraff has been proposed to enhance the finishing performance of mraff process. A new precision finishing process called magnetorheological abrasive flow finishing mraff, which is basically a combination of abrasive flow machining afm and magnetorheological finishing mrf, has been developed for nano finishing of parts even with complicated geometry for. Such surfaces reduce frictional forces and thereby minimize wear and tear to increase functional lifetime of the components. Polishing action in mrfluid depends on magnetization, magnetic.
Nanofinishing of freeform surfaces using abrasive flow finishing. Extrude hone corporation, usa, originally developed the afm process in 1966. The evolution of ultra precision finishing processes due to the continuous demand of stringent functional and technological requirement of the components has led to the emergence and development of the nonconventional abrasive flow finishing aff process. Magnetorheological finishing mrf is a precision surface finishing technology. In this process, a rotation cum reciprocating motion is provided to the polishing medium by a rotating magnetic field and hydraulic unit. View notes mrfmraff from me 688 at haldia institute of technology.
The tool is a pad or layer of abrasive laden elastic plastic medium similar to that used in two way abrasive flow finishing, but typically higher in viscosity and more in elastic. Fluid flow analysis of magnetorheological abrasive flow. Magnetorheological finishing international journal of. Rotational magnetorheological abrasive flow finishing rmraff process is a technique of nano finishing in general and free formsculptured surfaces in particular. The story of this revolutionary technology illustrates the vision, entrepreneurial drive, and trust among the people who turned a dream into reality.
Effect of process variables in improvement of surface. A new precision finishing process called magnetorheological abrasive flow finishing mraff, which is basically a combination of abrasive flow machining afm and magnetorheological finishing mrf, has been developed for nanofinishing of parts even with complicated geometry for a wide range of industrial applications. Development of magnetorheological finishing mrf process. Magnetorheological abrasive flow finishing mraff process has. Parametric analysis of magnetorheological abrasive flow finishing process article in international journal of manufacturing technology and management 234. Magneto abrasive flow machining mafm is a new technique in machining. Free form job is clamped through workpiece fixture in the drill chuck of the drilling machine. Current status and application of abrasive flow finishing processes.
Magnetic abrasive flow machining machining abrasive. Concept of magnetorheological phenomena is taken from mrf process to fabricate magnetorheological polishing mrp pad or flexible brush. As such, finishing of conventionally inaccessible surfaces e. Rotational magnetorheological abrasive flow finishing rmraff offers both automation and flexibility in final finishing operations. Magnetic abrasive finishingmaf seminar report pdf ppt download magnetic abrasive finishing maf is a process in which a mixture of nonferromagnetic abrasives and ferromagnetic iron particles is used to do particles in the mixture are magnetically energized using a magnetic field. The mrp pad contains abrasive particles nonmagnetic in chain. A study on the abrasive gels and the application of abrasive flow. Before going into the detail discussion of mraff process let first discuss other processes i. Magnetic abrasive finishingmaf seminar reportpdfppt download. Freeform surfaces, nanofinishing, knee joint, abrasive flow finishing. Rotational magnetorheological abrasive flow finishing rmraff device and method therefor nano finishing of complex surfaces.
Rotational abrasive flow finishing raff process and its effects on finished surface topography. Later, by finishing of microholes with the abrasive flow finishing process, the. Tooling proposed for finishing free form surfaces to nanometer level surface roughness value. Rotational magnetorheological abrasive flow finishing r. This paper examines the applicability of the magnetic abrasive finishing to the internal finishing of largesized bent tubes produced by high frequency induction bending. The working gap between the workpiece and the magnet is filled with magnetic abrasive particles. An abrasive flow finishing device, an abrasive flow finishing. Effect of process variables in improvement of surface roughness during finishing of al6061 alloy using abrasive flow machining mejar singh and sushil mittal research scholar, assistant prof, department of mechanical engineering, hctm kaithal, haryana, india accepted 15 july 2015, available online 20 july 2015, vol. Development of polymer abrasive medium for nanofinishing of. In the world of optical finishing qed technologies is the name of an american company that reduced to practice the art of magnetorheological finishing mrf.
Abstractmagnetorheological abrasive flow finishing mraff is an advanced hybrid process for producing ultrafine finished surfaces. Read fluid flow analysis of magnetorheological abrasive flow finishing mraff process, international journal of machine tools and manufacture on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Magnetorheological abrasive flow finishing is one of the processes with wide range of application. Article information, pdf download for development of polymer abrasive medium for. Modeling of surface generation and process monitoring of afm was conducted by williams and rajurkar during the late 1980s. Magnetic abrasive finishing maf is one of the nonconventional finishing processes, which produces a high level of surface quality and is primarily controlled by magnetic field. Improved surface finishing with abrasive flow machining extrude. Magnetorheological mr polishing fluid comprises of carbonyl iron powder and silicon carbide abrasives dispersed in the viscoplastic base of grease and mineral oil. Pdf abrasive flow finishing of stainless steel 304. The technology of finishing for optics, ceramics, and semiconductors is one of the most promising uses of the magnetorheological effect. We have taken the concept of magnetorheological finishing mrf from the laboratory to the optical fabrication shop floor.
Rotational magnetorheological abrasive flow finishing rmraff is a precision finishing process for nanofinishing of complex geometries using mrp fluid. Magnetic abrasive finishing of aisi52100 kheelan b. This could be attributed to the need for relaxation of tool limitations. So, in order to establish the process, the experimental. Magnetic fieldassisted finishing, sometimes called magnetic abrasive finishing, is a surface finishing technique in which a magnetic field is used to force abrasive particles against the target surface. A new magnetic abrasive medium, using silicone gel to. Comparative analysis of magnetostatic forces in ball end. A magnetorheological fluid for use in magnetorheological ultrasmooth polishing of a substrate surface, comprising an aqueous carrier vehicle. Read nanofinishing of flat workpieces using rotational magnetorheological abrasive flow finishing rmraff process, the international journal of advanced manufacturing technology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Study the rheological properties of abrasive gel with various. Nanometric surface finishing of typical industrial components. Rotational abrasive flow finishing raff process and its. Magnetic abrasive finishing process learn and grow.
Characterization and optimization of rheological parameters. Abrasive flow machining afm is a simple and efficient method to remove recasting layers making by wire electrical discharge machining wedm. By intelligently controlling these two motions, a uniform smooth mirrorlike. Novel arrangement of magnets and their pole directions for nano finishing of simple and complex surface components. In this paper ball end magnetorheological finishing bemrf has been analyzed for fluid behaviors under the influence of strong magnetic field. Optical surfaces are polished in a computercontrolled magnetorheological mr finishing slurry. Current status and application of abrasive flow finishing processes 819. Surface and edge finishing are achieved by rapid, lowamplitude, oscillations of the work piece relative to a selfforming elastic plastic abrasive polishing tool. Jun 21, 2007 a new precision finishing process called magnetorheological abrasive flow finishing mraff, which is basically a combination of abrasive flow machining afm and magnetorheological finishing mrf, has been developed for nanofinishing of parts even with complicated geometry for a wide range of industrial applications. This paper presents the 3d model of pressure distribution in the process of magnetorheological flow finishing. Abrasive flow machining, alumina powder, brass, magnetic abrasive finishing 1. K m patel2 abstractquality of surface is an important factor to decide the performance of manufacture product.
Material removal model and numerical analysis of fluid. In the present research work, a model has been developed for simulating the results of mraff process. The orbital flow machining process has been recently claimed to be another. Chapter 1 introduces briefly the stateofart of the precision finishing processes and mechanism of rmraff process. A novel magnetorheological grinding process for finishing. May 25, 20 how to build a hinged hoophouse for a raised bed garden duration. Magnetic abrasive finishing is a procedure in which work piece surface is smoothened by removing the material as micro.
Magnetic abrasive flow machining free download as powerpoint presentation. Modeling and energy efficiency of abrasive flow machining. Magnetorheological abrasive flow finishing, magnetorheological finishing, magnetorheological honing, ball. In this paper microstructure of the mixture of magnetic and abrasive. A novel approach of magnetorheological abrasive fluid. The prepared pag samples were given nomenclature and a method of nomenclature for a sample is as shown in fig. Magnetorhelogical finishing mrf, magnetorheological jet finishing mrjf, magnetorheological abrasive flow finishing mraff, magnetorheological abrasive honing mrah, and ball end magnetorheological finishing ball end mrf. Analysis of finishing forces and surface finish during.
Magneto rheological finishing is a fine finishing process that has been applied to a large variety of brittle materials, ranging from optical glasses to hard crystals. Performance analysis of ball end magnetorheological finishing. This process relies on smart magnetorheological fluids whose. Ghoshdastidar, ps 2008 fluid flow analysis of magnetorheological abrasive flow finishing mraff process. The magnetorheological mr fluidbased finishing process is a wellknown deterministic process for nanofinishing of soft, as well as brittle, materials.
Parametric analysis of magnetorheological abrasive flow. In this paper, the effect that afm process on the surface of the helical gear is investigated. The newly developed process was named as magnetorheological abrasive flow finishing mraff which maintains the versatility of afm process and at the same time introduces determinism and inprocess controllability of rheological properties of abrasive laden medium ofmrf, to give nano level surface finish on 3d complex surfaces. Seminar on magneto abrasive flow machining mafm free pdf report download. Pdf nanofinishing of freeform surfaces using abrasive flow. This process relies for its performance on magnetorheological effect exhibited by carbonyl iron particles along with abrasive particles in non. In order to maintain the versatility of afm process and at the same time introducing determinism and controllability of rheological properties of abrasive laden medium, a new hybrid process termed as magnetorheological abrasive flow finishing mraff is developed, fig. It is also identified that the polishing performance is excellent at high magnetic field strength, fast rotation speed, and high abrasive. Magneto rheological finishing mrf other than chemical aspects of cmp, mechanical action of finishing has been introduced from mrf process. The abrasive flow machining process is ideal for producing consistent, highquality finishes for complex internal shapes and targeted surface challenges. The relative motion between the polishing medium and the. A hybrid finishing process like rotational abrasive flow finishing raff is. Thus, in this paper, surface roughness improvement is studied in a pipe with rotating inlet flow of a magnetorheological finishing medium under imposing a magnetic.
Abrasive flow machining using abrasive paste with oiticica. Design and development of the magnetorheological abrasive. Analysis of magnetorheological abrasive flow finishing mraff. A novel magnetorheological grinding process is introduced to finish the inner cylindrical surface of the workpiece. Seminar on magneto abrasive flow machining mafm free report.
Magnetorheological abrasive flow finishing mraff process was developed for super finishing of internal geometries of hard materials. I am doing my pg thesis on modeling and fem analysis of magnetic abrasive finishing, so if any one knows the new research information of maf please let me know. Preparation and experiment of magnetorheological polishing. The gardening channel with james prigioni recommended for you. Development of magnetorheological finishing mrf process for. To study the effect of various parameters on magnetic abrasive finishing 1mithlesh sharma, 2devinder pal singh. Finishing force analysis and simulation of nanosurface. Analysis of magnetorheological abrasive flow finishing. Read nanofinishing of silicon nitride workpieces using magnetorheological abrasive flow finishing, international journal of nanomanufacturing on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. In this paper, the influence of the process parameters and abrasive fluid flow on surface integrity.
Characterization and optimization of rheological parameters of polymer abrasive gel for abrasive flow mach, 2017, pp. It uses semisolid, abrasive laden putty through or across a work piece. Maf 4, mrf and mfp 5 were the control of performance is done by the use of magnetic field. In maf, workpiece is kept between the two poles n and s of a magnet. Magnetorheological abrasive flow finishing mraff is an advanced hybrid process for producing ultrafine finished surfaces. A commercial, computer numerically controlled cnc mrf machine, the q22, has recently come online in optics companies to produce precision flat. It is described that at higher magnetic flux density, abrasive marks in the direction of motion were also observed due to deep penetration of some abrasive particles in the work piece surface. Magnetic fieldassisted finishing mfaf is developed for superfinishing of hard materials for both internalexternal geometries with a wide range of industrial applications.
I wish to collect some literature in magnetic abrasive finishing maf. Analysis of finishing forces and surface the authors. However, conventional afm methods have difficulty achieving uniform roughness of an axial distribution in circular hole polishing due to limited unitary axial motion of abrasive media. Abrasive flow machining process principle, parameters and capabilities 2. Unlike conventional rigid lap polishing, the mr fluids shape and stiffness can be magnetically manipulated and controlled in real time. Magnetic abrasives are emerging as important finishing methods for metals and ceramics. Abrasive flow machining afm is an effective method that uses the flow of a pressurized abrasive media for removing workpiece material. Abrasive flow machining afm, also known as abrasive flow deburring or extrude honing, is an. The story of this revolutionary technology illustrates the vision, entrepreneurial drive, and. In this approach, magnetorheological polishing fluid is used as a medium for the finishing of the inner cylindrical surface. Rheological properties yield stress and viscosity of mr fluid significantly affect the quality of the final.
In this experimental study, magnetorheological abrasive flow finishing mraff process is utilized to observe the effect of different finishing. Depending on the level of finish micro and nano required on the component surface. Experimental study of several tools for surface roughness. An internal magnetic abrasive finishing process was proposed for producing precisely finished inner surfaces of nonferromagnetic tubes used for piping systems 1. Extrude hone afm has been in the business for 49 years. Knee joint is one such example of free form surface which is used by orthopedic surgeons. The conventional finishing processes alone are incapable to develop the desired surface characteristics on complex geometry and in exercising inprocess control on finishing action. The quality of the finished surface mainly depends on the constituents of magnetorheological fluid and applied magnetic field. Cfd modeling and optimization of magnetorheological. In the rmraff process, rotational and reciprocating motions are provided simultaneously to mrp fluid by rotating permanent magnets using electric motor and reciprocating the fluid by a. Nanofinishing of freeform surfaces using abrasive flow finishing process.
Read modeling and simulation of surface roughness in magnetorheological abrasive flow finishing mraff process, wear on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Current status and application of abrasive flow finishing. Magnetorheological abrasive flow finishing, magnetorheological finishing, magnetorheological honing. So, conventional finishing processes such as grinding, honing, super finishing, lapping, these are all you have seen and we move on to the advanced machining.
Rheological properties and their correlation with surface. A new precision finishing process called magnetorheological abrasive flow finishing mraff, which is basically a combination of abrasive flow machining afm and magnetorheological finishing mrf, has been developed for nano finishing of parts even with complicated geometry for a wide range of industrial applications. Under the influence of a magnetic field, the carbonyl iron particles cips and nonmagnetic polishing abrasive particles remove material from the surface being polished. Nanofinishing process using magnetorheological polishing. Wo2014014948a1 magnetorheological fluid for ultrasmooth. It is shown from experimental results that diamond abrasive particles are appropriate for fine finishing the internal surface of the titaniumalloy tube. Dual motion rotation and reciprocation of mr fluid for increasing contact time of abrasive particles with workpiece surface to be. The magnetorheological grinding tool helps to slash away the roughness peaks present on the workpiece.
Orbital afm orbital afm 5 combines abrasive flow machining and. Magnetorheological finishing mrf in commercial precision. The aforesaid mentioned processes utilised the magnetorheological property of the finishing fluid but these. This paper presents the use of abrasive flow machining afm and development of abrasive paste using oiticica oil, a typical plant in the northeast region of brazil, are presented as a necessity in the face of the problems related to the surface finishing process parts employing existing comercial paste. Magneto abrasive flow machining mechanical project topics. Analysis of magnetorheological abrasive flow finishing mraff process. Magneto abrasive flow machining mechanical and automobile ieee project topics, thermal engineering base paper ideas, synopsis, abstract, report, figures, full pdf, working details for mechanical engineering me, diploma, btech, be, mtech and msc college students. It perfectly coupled with computer control, allowing in quantity production the unique accuracy and quality of a polished surface to be achieved. Optimization of magnetic abrasive finishing parameters during. It is used to deburring, polishing or radiusing, etc. Read design and development of the magnetorheological abrasive flow finishing mraff process, international journal of machine tools and manufacture on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at. The main objective of this work is to prepare mr fluid and investigating the various shape of flask and to determine the effect of various shape of tools on the surface of ms specimen and also verifying the stability of prepared mr fluid by using magneto rheological abrasive flow finishing process. An abrasive flow finishing device, an abrasive flow. This process makes use of a flexible polishing tool comprising the magnetorheological polishing mrp medium under varying magnetic field of an electromagnet.
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