Abrasive jet machining (AJM) is one of the modern machining processes where high velocity jet of abrasives mixed with dehumidified pressurized gas is made. PDF | Abrasive jet machining (AJM) is a manufacturing technology based on erosion localization and intensification. AJM has a progressively. PDF | As Abrasive jet machining (AJM) is similar to sand blasting and effectively removes hard and brittle materials. AJM has been applied to rough working.
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Non-corrosive abrading of ceramic materials can be carried out by abrasive jet machining AJM.
Important process parameters include i abrasive particles—its shape, size, strength, material and flow rate; ii carrier gas—its nature, composition, flow rate, pressure and temperature; iii abrasive jet—mixing ratio, striking velocity, impingement angle and stand-off distance; iv nozzle—its profile and inner diameter; and v work material—its mechanical properties and stress concentration.
However, variation in size in the entire volume should be low otherwise estimation or assessment will not be accurate. However, various accessories including pipeline must be capable enough to handle such high pressure without failure. I am a mechanical engineer with a passion for technical stuff.
Applications of Abrasive Jet Machining (AJM) Process
Frequent changing of nozzle is associated with idle time during machining. Typical frosted glass, it reduces transparency.
They are used to control the pressure and regulate the flow rate of abrasive jet. Compressed air is then passed into the mixing chamber.
Abrasive Jet Machining (AJM) – Process, Parameters, Equipment, MRR
It is also one application of abrasive jet machining. Nozzles must be highly resistant to abrasion and are typically made of tungsten carbide or synthetic sapphire.
Typical engraving applications for AJM includes— Incising person name or company name on nameplate Incising logo, serial number and other relevant information on product Incising registration number for vehicles Making decorative objects intricate styles cannot be obtained by AJM Ceramic abrading and glass frosting Non-corrosive abrading of ceramic materials can be carried out by abrasive jet machining AJM.
Different abrasives having a range of mcahining size can be utilized based on workpiece material and the operation it is intended to perform. Views Read Edit View history.
Zjm of nozzle in abrasive jet machining Can you choose AJM nozzle with arbitrary inner diameter? As discussed earlier, shape, size, strength, material and flow rate of abrasive can influence machining performance. The gas passes through a convergent-divergent nozzle before entering the mixing chamber, and then exits through a convergent nozzle.
Je jet machining is best suited for machining brittle and heat sensitive materials like glass, quartz, sapphire, ceramics etc, It is used for drilling holes, cutting slots, cleaning hard surfaces, deburring, polishing etc.
Abrasive jet machining
Benedict Manufacturing Engineering and Materials Processing Compressor unit also consists of drier and filter. Such abrasives zbrasive possess few basic properties for efficient removal of material as well as to get desired quality of cut.
The basic unit is schematically shown in following Figure. It also facilitates accurate estimation of productivity, delivery time machininng well as production cost. Retrieved from ” https: In the mixing chamber, abrasive powder is fed. The following Figure shows the variation in the diameter of cut with change in the stand off distance SOD. Abrasive materials have varying strength or hardness. Specifically it is used to cut intricate shapes or form specific edge shapes.
For the process that uses water as a carrier, see Water jet cutter. Types of patterns used in Casting Process. Disadvantages of Abrasive Jet Machining: AJM can be advantageously used for cleaning metallic or ceramic surfaces substrate macining be hard.
Category List Automobile Engineering Biomass Boiling heat transfer energy energy sources engineering materials. The process makes use of an abrasive jet with high velocity, to remove material and provide smooth surface finish to hard metallic workpieces.
Representative image Engraving is the process of incising pattern, letter, art or design on a solid surface for decorative or artistic or formal purposes.
When work material is hard and chemically inert such as ceramics like stone, cement, etc.