Abrasive Jet Machining (AJM) is a process that removes material from a workpiece using high-speed abrasive particles mixed with gas, allowing for intricate machining of brittle materials. Advantages include the ability to machine thin sections without tool contact and minimal heat generation, while disadvantages include low metal removal rates and the inability to reuse abrasive particles. Applications of AJM encompass fine drilling, micro welding, and machining of fragile materials like glass and ceramics.

1. Abrasive jet MACHINING
PROCESS- AJM
S.G.R. Education Foundation
G H RAISONI COLLEGE OF ENGINEERING AND MANAGEMENT
AHMEDNAGAR
NAAC ACCREDITED
(APPROVED BY AICTE, NEW DELHI, RECOGNIZED BY GOVT. OF MAHARASHTRA & AFFILIATED TO SAVITRIBAI PHULE PUNE UNIVERSITY)
- Prof. Aniket V. Joshi
Asst. Professor
Mechanical Engineering Department
GHRCEM, A’Nagar.

2. Abrasive jet machining (AJM)
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Fig: Set-up for Abrasive Jet Machining Process

3. Principle of ajm
o Process that removes material with the help of abrasive
particles
o Diameter of particles- 0.025 mm
o Process consist of mixture of fine abrasive particles and gas
at high pressure
o Stream of mixture is directed through a nozzle on to the
surface of workpiece
o Due to impact of high speed abrasive particles, metal is
removed
o Gas stream carries both the abrasive particles and the
fractured particles away.
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4. Set-up for ajm
 Abrasive particles are held in
hopper
 Regulator controls flow of
particles
 Gas at high pressure supplied to
mixing chamber
 Abrasive particles travel
through the hose and enter into
the nozzle
 When this high speed jet from
nozzle impinges on the
workpiece, erosion causes and
their impact removes the metal
from workpiece
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Fig: Set-up for Abrasive
Jet Machining Process

5. Advantages of ajm
 Intricate cavities and holes of any shapes
can be machined
 Brittle material of thin section can be
machined
 Low initial investment is required
 No direct contact of tool and workpiece
 Low amount of heat generated
 Normally inaccessible portions can be
machined with fairly good accuracy
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6. disadvantages of ajm
o Low metal removal rate
o Abrasive particles can not be reused
o Not suitable for ductile materials
o Poor machining accuracy
o After operation, cleaning is must
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7. Applications of ajm
o Fine drilling and micro welding
o Machining of semiconductors
o Frosting and abrading of glass articles
o Machining of intricate profiles on hard and fragile materials
o Cleaning and cutting operations on germanium, silicon,
quartz, mica etc.
o Machining brittle materials like glass, ceramics, refractories
etc.
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