Welding Technology (GATE/PSU)

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.