The document discusses spot and projection welding, outlining their processes, advantages, and applications in various industries such as automotive and manufacturing. Spot welding involves clamping metal pieces between electrodes and passing current to achieve fusion, while projection welding uses projections on metals to determine weld size and efficiency. Both methods are noted for their speed, cost-effectiveness, and ability to join multiple sheets without the need for filler materials.

1. SPOT AND PROJECTION
WELDING

2. Types of Welding
Welding
Process
Arc Resistance Gas
Spot Seam Projection Flash

3. Spot Welding

4. Spot Welding...
In Spot Welding the pieces to be joined are
clamped between two electrodes under force,
and an electrical current is sent through them.
Force is applied before, during, and after
the application of current to prevent arcing at
the work piece.
In spot welding fusion of faying surfaces of
a lap joint is achieved at one location by
opposing electrodes

5. Spot Welding Machines

6. Advantages of Spot Welding
 Spot welding is quick and easy
 No need to use any fluxes or filler metal
 Multiple sheets joined together at the same time.
 No dangerous open flame
 Saves production costs.

7. Applications of Spot Welding
Nuts & Bolts Join two Metal Sheets
Automobile Industry To make Batteries

8. Projection Welding

9. Projection Welding
In Projection welding size and shape of individual
welds are determined by the presence of projections,
embossments or intersections on the metals to be
joined.
 Metals are heated and coalescence is achieved not
through the use of an arc, but through the metals’
resistance to electrical currents passing through them
as they are held together with pressure by electrodes.
In projection welding the pieces to be joined are
clamped between two electrodes under force, anan
electrical current is sent through them.

10. Projection Welding Machines
Capacitor Discharge Projection Welding Machines

11. Advantages of Projection Welding
 Simultaneously we can make
any number of welds in heavier
materials easily.
 Welding can be made in metals
that are too thick to be joined by
spot welding.
 Lower Electrode Maintenance.
 Lower amount of current and
pressure needs to joint metals.
 Faster and Quicker and used in
mass production

12. Application of Projection Welding
Diamond Segment Welding
Automobile Industry
Semiconductors
Fan Covers
Compressor Parts
Hollow Metal DoorsAuto Electricals

13. THANK YOU
Artech Welders Pvt Ltd.
No. A- 16, H- Block, MIDC, Pimpri
Pune, Maharashtra - 411018, India
Phone : +(91)-(20)-27476160/27462772
Mobile : +(91)-9822438782/9822069212
E-mail :sales@artechwelders.com
www.artechwelders.com