MEE1007 MANUFACTURING PROCESS
L T P J C
2 0 2 0 3
Dr. CHINMAYA P. MOHANTY
Assistant Professor (Senior)
School of Mechanical Engineering,
VIT Vellore, Vellore, TN, India – 632 014.
, WELDING
1. Welding is a process in which two or more parts are
joined permanently at the contact surfaces by a
suitable application of heat and/or pressure.
2. Often a filler material is added to facilitate
coalescence.
3. The assembled parts that are joined by welding are
called a weldment.
VIT University 2
, JOINING PROCESS
Why welding?
1.Permanent joint is produced which will have the same property of
the base metal.
2.Since the added material is minimum, the joint has lighter weight.
3.Welded joints have smooth appearances helps in maintaining
metallic continuity.
4.It is less expensive.
5.Forming a joint in difficult locations is possible through welding
Extensive Applications
1. Constructions repairs and fabrications of bridges, railway tracks
and pipelines.
2.Welding of aerospace materials
3.Machine components viz. Heavy hydraulic turbine shafts, large
gears, pulleys, flywheels, gear housing, steel structures and
frames.
VIT University 3
, WELDING
Welding processes are classified into two major groups
1.Fusion welding
2.Solid-state welding
Fusion welding
1.In this process, base metal is melted by means of
heat.
2. Often, in fusion welding operations, a filler metal is
added to the molten pool to facilitate the process and
provide bulk and strength to the joint.
3.Commonly used fusion welding processes are:
arc welding, resistance welding, oxy fuel welding,
electron beam welding and laser beam welding.
VIT University 4
L T P J C
2 0 2 0 3
Dr. CHINMAYA P. MOHANTY
Assistant Professor (Senior)
School of Mechanical Engineering,
VIT Vellore, Vellore, TN, India – 632 014.
, WELDING
1. Welding is a process in which two or more parts are
joined permanently at the contact surfaces by a
suitable application of heat and/or pressure.
2. Often a filler material is added to facilitate
coalescence.
3. The assembled parts that are joined by welding are
called a weldment.
VIT University 2
, JOINING PROCESS
Why welding?
1.Permanent joint is produced which will have the same property of
the base metal.
2.Since the added material is minimum, the joint has lighter weight.
3.Welded joints have smooth appearances helps in maintaining
metallic continuity.
4.It is less expensive.
5.Forming a joint in difficult locations is possible through welding
Extensive Applications
1. Constructions repairs and fabrications of bridges, railway tracks
and pipelines.
2.Welding of aerospace materials
3.Machine components viz. Heavy hydraulic turbine shafts, large
gears, pulleys, flywheels, gear housing, steel structures and
frames.
VIT University 3
, WELDING
Welding processes are classified into two major groups
1.Fusion welding
2.Solid-state welding
Fusion welding
1.In this process, base metal is melted by means of
heat.
2. Often, in fusion welding operations, a filler metal is
added to the molten pool to facilitate the process and
provide bulk and strength to the joint.
3.Commonly used fusion welding processes are:
arc welding, resistance welding, oxy fuel welding,
electron beam welding and laser beam welding.
VIT University 4
