1. Topic
Water Jet Machining
Mr. Rahul R. Parde
Department of Production
Engineering
SGGSIE&T, Nanded

2. Outline
 Introduction
 Working principle
 Working
 Main Parts
 Cutting Materials?
 Advantages
 Disadvantages
 Applications
 Difference

3. INTRODUCTION
 Process in which mechanical energy of
water is used for removing material.
 Process work on the principle of erosion
effects.
 Fastest growing machining process
 Method of cutting materials using a waterjet
i.e. cutting tool
 Used during fabrication of machine parts.

4. Water Jet cutting Machine
(b) A computer-controlled, water-jet cutting machine
cutting a granite plate.

5. Working principle
• Process works on the principle of erosion
effect of a high velocity & small diameter
of water jet.
• Also this process works -
At jet velocity as high as-900m/s
At pressure as low as (69-200Mpa) &
At Inner dia. of nozzle – (0.07-0.5mm)

6. Working

7. Main parts
 Intensifier
 Accumulator
 Oil Pump
 Water jet nozzle
 XYZ Motion Controller

8. Process performance
 No requirement of predrilled hole
 Too thick material can be cut
 Machined surface have-
-No burrs ,
-No thermal damage &
-A good surface finish

9. Cutting materials
 Materials commonly cut
with a water jet include
rubber, foam, plastics,
leather, composites, stone,
tile, metals, food, paper and
much more.
 Materials that cannot be cut
with a water jet are
tempered glass, diamonds Fig:- A water jet cutting a
and certain ceramics.
metal tool

10. Advantages
 No HAZ
 Process is safer
 Pollution free process
 Cheaper than other processes.
 No need for re sharpening tools.

11. Disadvantages
Accuracy is poor (0.07mm)
Nozzle life is short
 very thick parts can not be cut
not suitable to cut brittle material

12. Applications
 Food preparation
 Cutting asbestos
 Mostly used
In shoe making industry
To cut lower strength materials

13. WJM Examples
(printed wire board)

14. Waterjets v/s Lasers
Waterjets are safer.
 simpler Maintenance
Waterjets do not heat
your part material.
 waterjets can machine
many materials that lasers After laser cutting
cannot.
After waterjet cutting

15. Parts Made by WJM
Samples of parts various nonmetallic parts

16. 1 Piece price
US $25000-27000

17. Reference
 www.Google.com
 www.Wikipedia.com
 www.Ask.com
 www.ehow.com