Welding Technology (GATE/PSU) APK

Welding technology handwritten notes for engineering students & GATE/PSU aspirants. Which have good explanation with pictorial representation and numerical with problem solutions.

Welding technology covered following topics which are indexed below :

Introduction to Manufacturing Processes
Introduction to basics of Materials and their processing
Introduction to Castings and steps involved in Casting Process
Advantage of casting and its applications
Patterns - Pattern making, Types, Materials used for patterns
Pattern allowances and their construction
Properties of moulding sands
Methods of Melting - Crucible melting and cupola operation
Defects in castings
Casting processes – Types –Sand moulding
Centrifugal casting, die- casting
Investment casting, shell moulding
Gating – Requirements – Types of gates, Design of gating systems
Function, types of Riser and Riser design.
Solidification of casting –Solidification of pure metal –Nucleation and grain growth,
casting design considerations
Welding: Classification
Types of welds and welded joints
welding - Types, oxy-fuel gas cutting
standard time and cost calculations
Arc welding
forge welding
Submerged arc welding
Resistance welding
Thermit welding
Inert Gas Welding
TIG Welding, MIG welding
Friction welding
Induction welding
Explosive welding
Laser Welding
Heat affected zone in welding
Welding defects causes and remedies
Destructive testing of welds
Non- destructive testing of welds
Introduction: Hot working & cold working
Strain hardening, recovery, recrystallisation and grain growth
Rolling fundamentals –theory of rolling, types of Rolling mills and products
Forces in rolling and power requirements
Stamping, forming and other cold working processes
Blanking and piercing
Bending and forming
Drawing and its types –wire drawing and Tube drawing – coining
Hot and cold spinning
Types of presses and press tools
Forces and power requirement in Press work
Introduction Basic extrusion process and its characteristics
Hot extrusion and cold extrusion
Forward extrusion and backward extrusion
Impact extrusion
Extruding equipment
Tube extrusion and pipe making
Hydrostatic extrusion. Forces in extrusion
Forging Processes: Forging operations and principles –Tools
Forging methods – Smith forging, Drop Forging
Roll forging
Forging hammers: Rotary forging
forging defects
cold forging, swaging
Forces in forging operations



These are topics for welding technology which are covered in app.