welding presentation with experiments srm university sonepat

1. welcome

2. SRM UNIVERSITY,SRM UNIVERSITY,
NCR SONEPATNCR SONEPAT
A VOCATIONAL PRESENTATION ON
WELDING ; ME0130 WORKSHOP
PRACTICESPRESEENTSTION BY --
GROUP LEADER -- SEJAL NARWAT
GROUP MEMBERS -- SHREYSTH PANDEY, RISHIT
GROVER , SARTHAK, SANSKAR ANHAL

4. welding
types of welding
classification of welding process
merits and limitations of welding process
joints of welding
application
conclusion
CONTENTS:

5. thisisadomesticexampleof
myhouse

6. WELDINGWELDINGWELDING

7. BASICBASICBASIC
PRINCIPLES OFPRINCIPLES OFPRINCIPLES OF
WELDINGWELDINGWELDING
BASIC PRINCIPLES
OF WELDING

8. A weld can be defined as a coalescence of
metals produced by heating to a suitable
temperature with or without the application
of pressure, and with or without the use of a
filler material.

9. Uses of welding in our daily life
welding is a part of our daily lives.
from the kitchen appliances we use each day, the buildings
we live in, to the cars we drive .
most of what we use is welded or made with equipment
that has been welded.
without welding, our lives would be completely different
and frankly.........quit boring.

10. USES OF WELDING IN OUR DAILY LIFE

11. TYPES OF WELDINGTYPES OF WELDINGTYPES OF WELDING

13. PLASTIC WELDING OR PRESSURE
WELDING
THE PIECE OF METAL TO BE JOINED ARE HEATED TO A PLASTIC
STATE AND FORCED TOGETHER BY EXTERNAL PRESSURE
(Ex)-- resistence welding

14. THE MATERIAL AT THE JOINT IS HEATED TO A MOLTEN
STATE AND ALLOWED TO SOLIDFY
(Ex)-- gas welding, arc welding
FUSION WELDING OR
NON PRESSURE WELDING

16. CLASSIFICATION OF WELDING
GAS WELDING (OXY-ACETYLENE)
ARC WELDING (METAL ARC)
RESISTENCE WELDING
SOLID STATE WELDING
THERMO- CHEMICAL WELDING
FRICTION STIR WELDING

18. GASWELDING

27. in solid state weldig two metals are joined below their
melting temperature by applying mechanical pressure and
heat
SOLID STATE WELDING

28. RESISTENCE WELDING
in which work pieces are welded due to combination of a process applied to
them and a localized heat genrated by a high electric current flowing
through the contact area of the world

30. FRICTION STIR WELDING

31. WELDING
JOINT TYPES

32. THERE ARE FIVE TYPES OF
JOINTS

34. A butt joint is a joint where two pieces
of metal are placed together in the
same plane, and the side of each
metal is joined by welding
BUTT JOINT WELDING

36. TEE JOINT WELDING
IT IS FORMED WHEN TWO MEMBERS
INTERSECT AT A 90 DEGREE ANGLE WHICH
MAKES THE EDGES COME TOGETHER IN THE
CENTER OF A PLATE OR COMPONENT.

37. TEEJOINTWELDING

38. CORNER JOINT WELDNG
Corner joints have similarities to tee welding
joints. However, the difference is the location of
where the metal is positioned. In the tee joint,
it’s placed in the middle, whereas corner joints
meet in the ‘corner’ in either an open or closed
manner—forming an ‘L’ shape.

39. CORNER
JOINT
W
ELDING

40. LAP JOINT WELDING
Lap welding joints are essentially a modified version of the
butt joint. They are formed when two pieces of metal are
placed in an overlapping pattern on top of each other.
They are most commonly used to joint two pieces with
differing thicknesses together. Welds can be made on one
or both sides.

42. EDGE JOINT WELDING
In an edge joint, the metal surfaces are
placed together so that the edges are even.
One or both plates may be formed by
bending them at an angle.

44. ADVANTAGES OF WELDINGADVANTAGES OF WELDINGADVANTAGES OF WELDING
permanent joint
100% strength
leak proof
no change in cross sectional area
plastics can also be joined
various shapes can be joined
dissimilar joining is also possible

45. DISADVANTAGES OF WELDINGDISADVANTAGES OF WELDINGDISADVANTAGES OF WELDING
change of metallurgical properties.
presence of HAZ.
residual stress generation.
distortion
poor performence under vibration
inspection is difficult

46. Aim: To join the given two work pieces as a lap joint
by arc welding.
Material used: Mild Steel plates.
Tools required:
• Welding power supply
• Flat file
• Welding rod
• Chipping hammer
• Electrode holder
• Wire brush
• Gloves and apron
• Earthing clamps
• Shield and goggles
EXPERIMENT

47. 1. First of all, the work pieces must be thoroughly cleaned to remove rust, scale and
other foreign
materials.
2. Then the given work pieces are placed on the table in such a way that one work piece
is placed
on the other work piece like the LAP joint is formed.
3. Appropriate power supply should be given to the electrode and the work pieces.
4. Now the welding current output may be adjusted.
5. When current is passed, arc is produced between the electrode and work pieces.
6. Then the welding is carried out throughout the length.
7. As soon as the welding process is finished, switch off the current supply and allow the
work
piece to cool.
8. Slag is removed by chipping process with the help of chipping hammer.9. Finally using
wire
brush, welded portions are cleaned.
PROCEDURE

48. Thus the given two work pieces are joined as a lap
joint by arc welding
RESULT

49. LAP JOINT

51. THE
END

52. ThankThankThank
you!you!you!