Nabrasive flow machining nptel pdf merger

Abrasive flow machining how is abrasive flow machining. Velocity 100 300 ms mixing ratio mass flow ratio of abrasive to gas standoff distance. Abrasive jet machining ajm, also known as microabrasive blasting, is a mechanical energy based unconventional machining process used to remove unwanted material from a given workpiece the process makes use of an abrasive jet with high velocity, to remove material and provide smooth surface finish to hard metallic workpieces. Introduction to abrasive machining and finishing processes dr. 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. Two american companies independently developed abrasive flow machining in the 60s 1, 2, 3. Abrasive flow machining afm for free form honing ffh. Flow international flow waterjet model wmc4020 is a gantry type system designed as a waterjet machining center with dynamic multiaxis cutting head. Mixing ratio mass flow ratio of abrasive to gas standoff distance 0. Such high velocity abrasive jet can machine almost any material. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Introduction to abrasive machining and finishing processes.

In order to combine the low erosion rate of a metal, and the high. It extruded across edges or surfaces to deburr, radius, polish. This fluid is typically very viscous, having the consistency of putty, or dough. Abrasive flow machining companies services iqs directory. Introduction abrasive flow machining afm is used to deburr, polish or radius surfaces and edges by flowing a semisolid abrasive media over these areas. Abrasive jet machining ajm is a nonconventional machining process where a high pressure air. The description consists of a set of coupled models, which are the following.

Initially, the process was applied in aerospace to machine highalloy components with inaccessible and complex inner shapes. The comprehensive directory provides access to full contact and ability information for sourcing professionals, engineers and researchers wishing to get information on machining. In this sense, they are no more unconventional or nontraditional. The ffh process utilizes an abrasive evenly dispersed in a puttylike substance. It also includes micronanofinishing processes viz, abrasive flow finishing, magnetic abrasive finishing, etc. They may abraasive manually operated, or automated using cnc. Situations where traditional machining processes are unsatisfactory or. An abrasive flow machine normally includes two medium chambers equipped with hydraulic rams, a fixture for holding the workpiece, and a clamping arbasive that holds all the components tightly together. The orbital flow machining process has been recently claimed to be another improvement over afm, which performs threedimensional machining of complex components. Hybridization of abrasive flow machining process afm with other nonconventional machining ncm processes is being explored in the recent times, so as. Magnetic abrasive flow machining machining abrasive. Controlling media flow characteristics during the abrasive flow machining process is critical to maintaining predictable results. Sharma, department of mechanical engineering, iit roorkee. It is a floor of assembly of several machine tools like lathe, planning, shaping, milling, drilling and power saw, etc lathe machine is amachinetool which rotates the workpiece on its axis to.

These processes can be classified as hybrid machining processes hmpa recent concept in the advancement of. Abrasive flow machining afm, also known an extrude honing, is an industrial process used in metalworking. Abrasive flow machining was initially applied for deburring and polishing operations which until then had to be. Abrasives gas propulsion system supplies clean and dry air.

Afm smooths and finishes rough surfaces, and is specifically used to remove burrs, polish surfaces, form radii, and. This to certify that the thesis entitled design and fabrication of abrasive jet machine being submitted. Extrude hone model profile 150 abrasive flow deburring polishing and honing machine duration. Air, nitrogen and carbon dioxide to propel the abrasive particles.

The range between the two optimum speeds is known as the highef. Nontraditional and hybrid machining processes by hassan abdelgaward elhofy book is a good reference for both nontraditional and hybrid machining processes. This report deals in an innovative modelling of abrasive flow machining process and simulation of the problem is done with cfd. Abrasive flow manufacturers, service companies and distributors are listed in this trusted and comprehensive vertical portal. There are several important specifications for abrasive blast machines and sandblasters. Magnestic abrasive finishing process linkedin slideshare.

We can supply a full range of machines, tooling and fixtures, application development, part processing services, abrasive compounds, electrolytes, and product support services. This process is used to finish the interior surfaces of cast metals and produce controlled radii in the finished product. 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. A silicatebased medium is forced through the internal geometries of a work piece by a hydraulic cylinder. Electrochemicalaided abrasive flow machining eca 2 fm. Design and fabrication of abrasive jet machine semantic scholar. Abrasive flow machining afm for free form honing ffh lapmaster wolters has invested into further development of the abrasive flow machining afm for free form honing ffh. Maf is process in which mixture of non ferromagnetic abrasive and feromagnetic iron particle is taken and magnetically energized using a magnetic field. Abrasive machining is a machining process where material is removed from a workpiece using a multitude of small abrasive particles. The use of abrasives to shape parts is probably the oldest material removal process.

Machine shop is shop where materials are cut to the required shape and size according to the necessity for the use of civilization or ready to sell in the market. Non conventional machining processes enable us to get consistency and accuracy in our desired manufacturing techniques. Journal of materials processing technology, 28 1991 107116 elsevier abrasive flow machining. New abrasive flow machining according to a chinese proverb, dripping water can wear away the hardest stone.

The media flow is the rate at which the abrasive grain feeds into the system. 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. The working gap between the work piece and a magnet is filled with magnetic abrasive particle maps. Ultrasonic machining, water jet machining, abrasive water jet machining. Manufacturing processes i nptel online videos, courses. Abrasive flow machining is a fine finishing process, mainly for the finishing of complex internalexternal surfaces of metallic parts. Mamilla ravi sankar department of mechanical engineering indian institute of technology guwahati.

Examples of conventional machining processes are turning, boring, milling, shaping, broaching, slotting, grinding etc. Abrasive blast machines and sandblasters 286 companies. This book addresses issues essential to unconventional machining processes, covering all modern machining processes such as mechanical processes, electrochemical and chemical metal removal processes, and thermal metal removal processes. Abrasive flow machining afm is a relatively new process among nonconventional machining processes. Concepts fo fixture design for the dynaflow process technical paper society of manufacturing engineers. The medium contains a certain amount of abrasive particles.

Let winbro flow grinding be your solution provider for all your flow grinding and electrolytic deburring needs. Advantages and disadvantages of ajm are given here. Magnetic abrasive flow machining free download as powerpoint presentation. Advantages and limitations of abrasive jet machining ajm.

Process principle afm is a finishing process that removes a small quantity of material. Limited efforts have hitherto been directed towards improving the efficiency of these processes so as to achieve higher material removal rates by. Process modeling and cfd simulation of twoway abrasive. Originally manufactured in 1103 this machine is in plant and under power. 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.

In abrasive jet machining, a focused stream of abrasive particles, carried by high. The studies regarding the abrasive flow machining miller et al. Magneto abrasive flow machining mechanical project topics. 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 machining involves material removal by the action of hard, abrasive particles. The process of abrasive flow machining produces a smooth, polished finish using a pressurized media. Abrasive flow machining afm, also known as abrasive flow deburring or extrude honing, is an interior surface finishing process characterized by flowing an. Abrasive flow machining systems abrasive flow machine afm is a nontraditional machining process that is used to deburr, polish, radius, and remove recast layers of. Ssc 10th result 2016, check online 10th maharashtra result 2016, ssc online results maharashtra 2016, hsc result 2016. High surface finishing is achieved through abrasive flow machining afm.

It uses semisolid, abrasive laden putty through or across a work piece. Abrasive processes are usually expensive, but capable of tighter tolerances and better surface finish than other machining processes. Abrasive flow machining afm is an abrasive machining process used to machine internal geometries like bores in terms of deburring and finishing the surface with high performance. Advanced nontraditional machining processes 301 employed for finishing purposes, like abrasive flow machining afm, magnetic abrasive flow machining mafm, magnetic abrasive finishing maf, magnetic float polishing mfp, magnetorheological abrasive flow finishing mraff, elastic emission machining eem and ion beam machining ibm. Abrasive jet micro machining ajmm is a relatively new. Note that there is an optimum cutting speed for both cost and time, respectively.

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 flow machining afm semih sancar 20622852 selcuk unal 20622976 yunus kocabozdogan 20519809. Like most of the finishing processes, this process is also a slow process due to low material removal rate. Calibrate fuel injection nozzles to a specific flow rate. Investigation of oneway abrasive flow machining and in. Abrasive flow machining afm hacettepe universitesi. Low material removal rate happens to be one serious limitation of almost all such processes.

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