Download - INSTRUMENTATION OF ABRASIVE JET MACHINE
APRELIMINARY
PRESENTATION ON
Shri S’ad Vidya Mandal Institute Of TechinologyBHARUCH – 392001.
“INSTRUMENTATION OF ABRASIVE JET MACHINE”
Guided By : SHRI H.G.SHAH
Prepared By: KACHHADIYA DHIRAJ V. [000009]
PATEL NIMESH H. [000031]
SHAH RAKSHIT M. [000039]
SUKANI SUNNY R. [000043]
VAGHASIYA RAVI [000046]
INTRODUCTION TO AJM
What is AJM ?
Working of AJM ?
BLOCK DIA OF WORKING OF AJM
APPLICATION OF AJM
In cutting slots
Thin sections, contouring
Drilling
For producing shallow crevices
For producing intricate shape in hard and Brittle materials
Often used for cleaning and polishing of plastic, nylon and Teflon components
Etching of marking on glass cylinder
Gas
ADVANTAGE OF AJM
Ability to cut intricate hole shape.
Ability to cut fragile & heat sensitive
material without damage as no heat is
generated due to passing of gas or air.
Low capital cost.
DISADVANTAGE OF AJM
MRR is slow.
Limited application.
Machining accuracy is poor.
Nozzle wear rate is high.
Additional cleaning of work
surface may required.
INSTRUMENTATION
What is instrumentation ?
WHICH PARAMETERS WILL BE ADDED IN
THE EXISTING MACHINE?
FLOW METER
VIBRATOR
ABRASIVE MATERIAL
ABRASIVE GRAIN SIZE
STAND OF DISTANCE
PRESSURE REGULATING VALVE
FLOW METER
The material removal rate can be improved by increasing the abrasive flow rate provided the mixing ratio can be kept constant as shown in Chart - (2). The mixing ratio can be kept unchanged only by a simultaneous increase of both gas and abrasive mass flow.
CALIBATED VIBRATOR Calibrated vibrator is used for proper mixing of abrasive particles in the air stream is provided vibrating motion to the mixing chamber.
Our vibrator including linear vibrating feeder have the advantages of stable vibration, reliable working, and long service life and so on. Vibrating machine can provide materials evenly for crushing machinery, and make coarse separation.
DIFFERENT ABRASIVE MATERIALS
Aluminum Oxide, Al2O3.
Silicon Carbide, Sic.
Boron Carbide, B4C.
Cubic Boron Nitride, CBN.
Diamond.
SHAPE AND SIZE OF ABRASIVE
Blocky Shape (High Bulk density)
Blocky Shape (Medium Bulk density)
Sharp Shape (Low Bulk density)
Platelet Shaped
Extreme Shapes
GRAPH OF MRR V/S ABRASIVE FLOWRATE
GRAIN SIZE 10µ
25µ
50µ
ABRASIVE FLOWRATE
MRR
MIXING RATIO CONSTANT
MIXING RATIO
MRR MRR
ABRASIVE FLOWRATE
DIFFERENT GRAPH THEORITICALLY
VARYING STAND OFF DISTANCE
At starting the MRR increases with increase STD up to certain limit then it will be constant for some limit and after that MRR decreases with respect to STD.
MRR
Gas pressure
PRESSURE REGULATING VALVE
From the graph we conclude that With the help of pressure regulating valve gas pressure increases the MRR is also increases.
FUTURE WORK
Install the flow meter and vibrator.
Perform the experiment.
REFRENCES
“Manufacturing Science”
-AMITABHA GHOSE
-ASOK KUMAR MALIK
“New Technology”
-AMITABH BHATTACHARYA
“Production Technology”
-P.C.SHARMA
REFRENCES
WWW.UAMA.ORG/ABRASIVES 1O1
WWW.EOD.GVSU.EDU/EOD
WWW.FLOWMETERS.COM