This document presents information on abrasive jet machining (AJM). It discusses the working principle of AJM, which involves a focused stream of abrasive particles carried by compressed air or gas impacting the work surface through a nozzle to remove material by erosion. The key components of an AJM system are identified as the pump, control system, mixing chamber, and nozzle. Applications of AJM include micro-machining of brittle objects, deburring, cutting of optical fibers, and machining of lenses. Advantages include the ability to machine intricate shapes in hard materials without contact or heat, while disadvantages include lower accuracy and material removal rates compared to other machining methods.

1. ABRASIVE JET MACHINING
PRESENTATION ON
Presented By:- Daksh Bhagoriya

2. CONTENT
1
2
3
4
INTRODUCTION
WORKING PRINCIPLE OF AJM
COMPONENTS OF AJM
APPLICATIONS
5 ADVANTAGE'S/DI
SADVANTAGE

3. INTRODUCTION
 ABRASIVE JET MACHINING IS A PROCESS IN WHICH A FOCUSED STREAM OF
ABRASIVE PARTICLE CARRIED BY HIGH PRESSURE OF AIR OR GAS IS MADE TO
IMPIMGE ON THE WORK SURFACE THROUGH A NOZZLE.
 THE WORK MATERIAL IS REMOVED BY EROSION WITH THE HELP OF HIGH
VELOCITY ABRASIVE PARTICLES.

4.  In Abrasive jet machining abrasive particles are made to
 impinge on work material at high velocity.Jet of abrasive
particles is carried by carrier gas(generally
compressed air).
 The high velocity stream of abrasives is generated by
converting pressure energy of carrier gas to its Kinetic
energy with the help of nozzle.
 The high velocity abrasive particles remove the material
by micro-cutting action as well as brittle fracture of the
work material.
WORKING PRINCIPLE OF AJM

5. SCHEMATIC DIAGRAM OF AJM

7. COMPONENTS OF
AJM3
1
PUMP2
CONTROL SYSTEM
3 NOZZLE
4 MIXING CHAMBER

8. Component
s
Of AJM
 The control algorithm
that computes exactly
how the feed rate
should vary for a given
geometry in a given
material to make a
precise part.
CONTROL SYSTEM
 Crankshaft &
intensifier pump are
mainly use in the
abrasive jet machine.
 The intensifier pump
was the only pump
capable of reliably
creating pressures
PUMP
 The mixing tube is
where the abrasive
mixes with the high
pressure water.
 The mixing tube
should be replaced
when tolerances drop
MIXING CHAMBER
 All abrasive jet systems
use the same basic two
stage nozzle. First,
water passes through a
small diameter jewel
orifice to form a narrow
Jet.
 Generally two type of
nozzle use, right angle
head & straight head.
NOZZLE
COMPONENTS OF AJM

9. Sectional
View Of
Nozzle

10. APPLICATIONS OF AJM
AJM is useful in
manufacture of
electronic devices.
Micro-machining of
brittle objects.
Deburring of some
critical zones in the
machined parts.
Cutting of optical
fibers without
altering its
wavelength is one of
the most important
applications of this
process.
Making of nylon and
Teflon parts,
permanent marking
on rubber stencils,
cutting titanium
foils.
Cutting, drilling and frosting of precision
optical lenses.

11. Advantages/Disa
dvantages5

12. 1. It has the capability of cutting holes
of intricate shape in hard materials.
2. Thin sections of hard & brittle
materials like germanium, mica,
silicon, glass and ceramics can be
machined.
3. Process is free from chatter and
vibration as there is no contact
between the tool and work piece.
4. The power consumption in abrasive
jet machining process is considerably
low.
5. Abrasive jet machining process
creates localized forces and
generates lesser heat than the
conventional machining processes.
1. The accuracy of cutting is
hampered by tapering of hole due
to unavoidable flaring of abrasive
jet.
2. Abrasive powders cannot be reused
as the sharp edges are worn and
smaller particles can clog the
nozzle.
3. The mixing chamber and the nozzle
are the two critical components
and they need to be changed very
frequently because of the wear.
4. Material removal rate in abrasive
jet machining process is rather
low(around 15 mm?*/min for
glass).
ADVANTAGES DISADVANTAGES

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