Abrasive Jet Machining Process, Unit-I, Advanced Manufacturing Process, MSBTE, Mechanical Engineering, Diploma,

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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8. 8
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