Since the process is non thermal, nonchemical and nonelectrical it creates no. Abrasive flow machining mechanism of material removal. Let winbro flow grinding be your solution provider for all your flow grinding and electrolytic deburring needs. This fluid is typically very viscous, having the consistency of putty, or dough. Material removal processes machining is the broad term used to describe removal of material from a workpiece includes cutting, abrasive processes grinding, advanced machining processes electrical, chemical, thermal, hydrodynamic, lasers automation began when lathes were introduced in 1700s.
Sharma, department of mechanical engineering, iit roorkee. In order to cut harder materials like metals or granite, an abrasive material is. In order to cut harder materials like metals or granite, an abrasive material is mixed in the water. This abrasive blasting machine is a single piece flow grit system for etching industrial turbine blades up to 15 380 mm in length and 8 203 mm diameter using aluminum oxide sand blasting media. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. We can supply a full range of machines, tooling and fixtures, application development, part processing services, abrasive compounds, electrolytes, and product support services. Nptel video lecture topic list created by linuxpert systems, chennai nptel video course mechanical engineering advanced machining processes subject coordinator prof. Abrasive flow machining afm, also known as abrasive flow deburring or extrude honing, is an interior surface finishing process characterized by flowing an abrasiveladen fluid through a workpiece. The description consists of a set of coupled models, which are the following. The working gap between the workpiece and the magnet is filled with magnetic abrasive particles. Velocity 100 300 ms mixing ratio mass flow ratio of abrasive to gas standoff distance 0. Abrasive flow machining machining abrasive free 30. All india council for technical education aicte the statutory body and a nationallevel council for technical education, under department of higher education, ministry of human resource development and nptel have signed an mou on july 24, 2018 whereby advanced nptel online certification courses are approved for faculty development programme fdp by aicte. Abrasive flow manufacturers, service companies and distributors are listed in this trusted and comprehensive vertical portal.
This book draws upon the science of tribology to understand, predict and improve abrasive machining processes. Low material removal rate happens to be one serious limitation of almost all such processes. Common examples include grinding, honing, and polishing. Abrasive flow machining companies services iqs directory. Download the handbook of mechanical engineering pdf ebook the handbook of mechanical engineering the handbook of mechan.
The top countries of suppliers are turkey, china, from which the percentage of abrasive flow machine supply is 1%, 98% respectively. Abrasive flow machining afm is a secondary water jet machining process used to smooth, polish, radius, and remove cracks and burrs from hard to reach or internal surfaces of machinery, parts and products. In abrasive jet machining, a focused stream of abrasive particles, carried by high pressure air or gas is made to impinge on the work surface through a nozzle and the work material is made to impinge on the work surface through a nozzle and work material is removed by erosion by high velocity abrasive particles. Introduction to nontraditional machining iit kanpur. Water jet machining wjm is a mechanical energy based nontraditional machining process used to cut and machine soft and nonmetallic materials. Introduction the controlled movement of parts or a controlled application of force is a common requirement in the industries. Abrasive flow machining afm, also known as abrasive flow deburring or extrude honing, is an interior surface finishing process characterized by flowing an abrasive laden fluid through a workpiece. Cfd simulation of the abrasive flow machining process. It is similar to abrasive jet machining ajm in water jet machining, high velocity water jet is allowed to strike a given workpiece. Magnetic abrasives are emerging as important finishing methods for metals and ceramics. Note the special fixture, which is usually different for each part design.
Controlling media flow characteristics during the abrasive flow machining process is critical to maintaining predictable results. Apr 16, 2020 abrasive flow machining makes it possible to polish and smooth areas that otherwise would be unreachable, because the ability of the media to flow through the part is the only limiting factor. For the abrasive flow machining afm process, a highly viscous polymeric carrier mixed with abrasive grain is used for deburring, edge rounding and the general improvement of surface quality of workpieces with complex geometries. Abrasive flow machining process principle, parameters and capabilities 2. Purchase tribology of abrasive machining processes 1st edition.
Extrude hone model profile 150 abrasive flow deburring polishing and honing machine duration. Abrasive processes are usually expensive, but capable of tighter tolerances and better surface finish than other machining processes. Experimental investigations and modeling of drill bitguided abrasive flow finishing dbgaff process. Tribology of abrasive machining processes 1st edition. In awjm, abrasive particles like sand sio2, glass beads are added to the water jet to enhance its cutting ability by many folds. May 01, 2017 abrasive flow machining process advanced abrasive flow machining afm.
The aim of the research programme is to achieve a better understanding of the the thermal and fluid flow properties of polymers used in afm, in order to establish a basis for the control and optimisation of the. In addition, the process of abrasive flow machining can be almost completely automated, freeing human workers to perform other tasks and providing a cost. Two american companies independently developed abrasive flow machining in the 60s 1, 2, 3. Abrasive flow machining afm, also known an extrude honing, is an industrial process used in metalworking. 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. It involves the use of high velocity water jet to smoothly cut a soft workpiece. Abrasive flow machining free download as powerpoint presentation. They are important because introduction they can be used on all types of materials ranging from soft metals to hardened steels and hard nonmetallic materials such as. These operations are performed mainly by using electrical machines or diesel, petrol and steam engines as a prime mover. In maf, workpiece is kept between the two poles n and s of a magnet. It uses semisolid, abrasive laden putty through or across a work piece. Nptel moocs massive open online courses will have regular assignments and in person examination at the end.
A test will be conducted by nptel and a certificate be issued to only those participants who attended the programme and qualify in the test. Nonconventional machining, introduction and abrasive jet machining, pdf, 0. Abrasive flow machining machining abrasive free 30day. The use of abrasives to shape parts is probably the oldest material removal process. Non traditional abrasive machining processes ultrasonic, abrasive jet and abrasive water jet machining video. Limited efforts have hitherto been directed towards improving the efficiency of these processes so as to achieve higher material removal rates by. The present study examines a simple, zeroorder semimechanistic approach towards the analysis of the twoway flow abrasive flow machining process, stemming from a need to reduce the number of timeconsuming and laborintensive experimental trials. Abrasive flow machining was initially applied for deburring and polishing operations which until then had to be. Each media formulation consists of a polymeric, flowable carrier into which one or more sizes of abrasive grain have been mixed. Modeling of surface generation and process monitoring of afm was conducted by williams and rajurkar during the late 1980s. The working gap between the work piece and a magnet is filled with magnetic abrasive particle maps. Tribology of abrasive machining processes 2nd edition. Ultrasonic machining, water jet machining, abrasive water jet machining. The process of abrasive flow machining produces a smooth, polished finish using a pressurized media.
Jain coordinating institute iit kanpur subtitles available unavailable lecture lecture lecture lecture lecture lecture lecture lecture lecture. Process modeling and cfd simulation of twoway abrasive. Media temperature, flow rate and viscosity can be a challenge to maintain during conventional abrasive flow machining processes, which can adversely affect the systems ability to predict processing time as well as. Abrasive machining involves material removal by the action of hard, abrasive particles. The introduction of abrasives to the fluid jet enhances the machining efficiency and is known as abrasive water jet machining. Water jet machining wjm is a mechanical energy based nontraditional machining process used to cut and machine soft and nonmetallic materials it involves the use of high velocity water jet to smoothly cut a soft workpiece. Grinding grinding is the most common form of abrasive machining. Abrasive jet machining project for mechanical engineering degree and diploma students duration. In abrasive jet machining, a focused stream of abrasive particles, carried by high.
Water jet machining wjm also called water jet cutting, is a nontraditional machining process in which highvelocity jet of water is used to remove materials from the surface of the workpiece. Classification of metal removal processes and machine tools. Journal of materials processing technology, 28 1991 107116 elsevier abrasive flow machining. Abrasiveflow machining schematic illustration of abrasive flow machining to deburr a turbine impeller. Abrasive flow machining afm is a relatively new process among nonconventional machining processes. Introduction abrasive flow machining afm is used to deburr, polish or radius surfaces and edges by flowing a semisolid abrasive media over these areas. A wide variety of abrasive flow machine options are available to you, there are 1,091 suppliers who sells abrasive flow machine on, mainly located in asia. Pulling together information on how abrasives work, the authors, who are renowned experts in abrasive technology, demonstrate how tribology can be applied as a tool to improve abrasive machining processes. Mechanical engineering manufacturing processes ii nptel.
It uses a polymer resin and abrasive materials, which are called media, in water under pressure to reach bends, cavities and edges. May, 2016 maf is process in which mixture of non ferromagnetic abrasive and feromagnetic iron particle is taken and magnetically energized using a magnetic field. Abstract abrasive flow machining afm is a non conventional finishing process that deburrs and polishes by forcing an abrasive laden media across the workpiece surface. Magnestic abrasive finishing process linkedin slideshare. Afm smooths and finishes rough surfaces, and is specifically used to remove burrs, polish surfaces, form radii, and. The abrasive media used in abrasive flow grinding also known as abrasive flow machining afm provides the actual material removal. For the abrasive flow machining afm process, a highly viscous polymeric carrier mixed with abrasive grain is used for deburring, edge rounding and the general improvement of.
Development of magneto abrasive flow machining process. List of nptel online courses for aicte fdp, jan apr 2020 click here to download. The comprehensive directory provides access to full contact and ability information for sourcing professionals, engineers and researchers wishing to get information on machining. Metal cutting and tool design abrasive flow machining afm is a process for the production of excellent surface qualities of inner profiles that are difficult to access and outside edges, as well as for deburring and edge rounding. Computer modelling of the abrasive flow machining process. The chapter does not cover the studies on abrasive jet machining, abrasive flow machining, and pure water jet machining. Abrasive flow machining afm semih sancar 20622852 selcuk unal 20622976 yunus kocabozdogan 20519809. May 20, 2017 water jet machining wjm also called water jet cutting, is a nontraditional machining process in which highvelocity jet of water is used to remove materials from the surface of the workpiece. The authors are currently involved in an extensive research and development programme into the abrasive flow machining afm process. Abrasive flow machining afm was developed in 1960s as a method to deburr, polish, and radius difficult to reach surfaces like intricate geometries and edges by. Pulling together information on how abrasives work, the authors, who are renowned experts in abrasive technology, demonstrate how tribology can be applied as a. Advances in materials and materials processing abstract. Wjm can be used to cut softer materials like plastic, rubber or wood.
Initially, the process was applied in aerospace to machine highalloy components with inaccessible and complex inner shapes. Abrasive flow machining process advanced abrasive flow machining afm. Process principle afm is a finishing process that removes a small quantity of material. Extrude hone corporation, usa, originally developed the afm process in 1966. Abrasive machining is a machining process where material is removed from a workpiece using a multitude of small abrasive particles. Abrasive flow machining afm was developed in 1960s as a method to deburr, polish, and radius difficult to reach surfaces like intricate geometries and edges by flowing a abrasive laden. Abrasive flow machining schematic illustration of abrasive flow machining to deburr a turbine impeller. Part 2 deals with thermal machining processes for example, electric discharge machining, laser beam machining, electron beam machining, etc. This process is used to finish the interior surfaces of cast metals and produce controlled radii in the finished product. Module 3 selection of manufacturing processes nptel. Maf is process in which mixture of non ferromagnetic abrasive and feromagnetic iron particle is taken and magnetically energized using a magnetic field. Cannot be used for machining castings or hot rolled steel, since hard outer scale will damage the cutter. Abrasive flow machining afm hacettepe universitesi.
The arrows indicate movement of the abrasive media. It is a material cutting process that engages an abrasive tool whose cutting elements are grains of abrasive material known as grit. For download mechanical engineering lab manual click the button 28032016 1 medick was the unwittingly inquisitori. Water jet machining working principle, advantages and. Abrasive jet machining is an efficient technology for the fabrication of three dimensional micro structures on brittle materials.
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