The document discusses water jet machining, which uses high-pressure water to cut materials. It works by eroding material using a water jet with a small diameter nozzle operating at velocities over 900m/s. The main components are an intensifier, accumulator, oil pump, water jet nozzle, and XYZ motion controller. Water jet machining can cut a variety of materials without heat or burrs and is commonly used in industries like shoe and printed circuit board manufacturing. It has advantages over lasers such as being safer, requiring simpler maintenance, and able to cut heat-sensitive materials.

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