Abrassive jet machining

1. ADARSH S
REG NO : 16020131
ROLL NO : 6
S5 MECHANICAL

2.  It is the process of removing material by
using high velocity stream of air/gas or
water and abrasive mixtures.
 Abrasive particles should have high metal
removal rate and accuracy.
 High velocity jet is used to remove metal
from work piece.

3.  FILTER
 COMPRESSOR
 PRESSURE GAUGE AND FLOW
REGULATOR
 MIXING CHAMBER
 HOPPER
 VIBRATOR
 NOZZLE
 ABRASIVE JET

4.  It is usually made of TUNGSTEN CARBIDE.
 It has resistance to wear.
 It provide efficient mixing of abrasives and
water jet.
 It helps to increase the velocity of the mixture.

5.  It compresses the air to a pressure of 15-20 bar.
 Compressor unit also consist of drier and
filter.
 It removes water vapour and dust particles to
avoid condensation .

6.  Pressure gauge is used for measuring pressure
of air as well as gass abrasive mixture.
 Flow regulator controlls volume flow rate of air
to maintain constant mixing ratio.

7.  In AJM circular hopper is employed for
continuously supplying fresh abrasive to the
mixing chamber.
Mixing chamber
 It mixes abrasives with pressurized air inside
the chamber .
 A vibrator is used to obtain a homogeneous
mixing.

9.  High pressure water starts at the pump and is
delivered through special high pressure
plumbing to the nozzle.
 At the nozzle abrasive mixtures are
introduced and cutting is performed.
 The nozzle increases the velocity of the
mixture at the expense of its pressure.
 The jet is used to remove unwanted material
from the work piece.

10.  Different types of abrasive are used in
abrasive jet machining like garnet , aluminum
oxide , olivine , silica sand , silicon carbide ,etc .
 Abrasive particles must be hard ,high
toughness, irregular in shape & edges should
be sharp .

11.  Paint removal
 Cleaning
 Drilling
 Turning
 Cutting
 Engraving

13.  Surface of the workpiece is cleaned
automatically.
 Smooth surface finish can be obtained.
 Equipment cost is low.
 Less vibration.
 No heat generation.
 Eco friendly.
 Easy of operation
 No skilled labour is required

14.  Low metal removal rate.
 Abrasive powder cannot be reused.
 Taper is also a problem.
 Nozzle life is less.
 Nozzle should be maintained periodically

15.  The better performance and the applications
represented above statement conform that AJM
is continue to expand .
 The new softwares used to minimize time and
investment there by making it possible for
more manufacturers of precision parts to install
AJM centers.

16.  Texas Airsonics, archived from the orginal on
March 4, 2012.
 Boothroyd, Geoffrey; Knight, Winston
(1989), Marcel Dekker, pp. 478–9,
 Todd, Robert H.; Allen, Dell K.; Alting, Leo
(1994),, Industrial Press Inc., pp. 2–5,
 Chastagner, Matthew W.; Shih, Albert J.
(2007), Transactions of NAMRI/SME, 35: 359–
366.