Table of Content
 

 

Safety precaution in work shop

  • Importance of Fabrication work in Industry
  • Safety in gas welding manual metal arc welding
  • Safety apparels
  • Steel rule
  • Necessity of marking
  • Steel rule
  • Scriber
  • Punches
  • Centre punch
  • Prick punch
  • Dot punch
  • Hammer
  • Major parts of a hammer
  • Face
  • Peen or pein
  • Cheek
  • Eye hole
  • Specification
  • Before using hammer
  • Bench vice
  • Chisel
  • Clamps
  • Types of clamps used
  • Uses of different types of clamps
  • Hacksaw frame and blade
  • Types of hacksaw frames
  • Solid frame
  • Adjustable frame ( Flat type )
  • Adjustable frame ( Tabular type )
  • Hacksaw Blades
  • Types of hacksaw Blades
  • Flexible Blades
  • Pitch of the Blade
  • Setting of the saw
  • Staggered Set
  • Parts of a file
  • Edge
  • Heel
  • Shoulder
  • Tang
  • Handle
  • Ferrule
  • Materials
  • Cleaning of files
  • Method of removing pinning
  • Try square
  • Uses
  • Wing compass
  • Snips
  • Types
  • Straight snips
  • Bentsnips
  • Specification
  • Hand lever shears
  • Mallet
  • Types
  • Ordinary mallet

Cutting Methods

  • Straight cutting method
  • Procedure for tape measure
  • Circular cutting machine
  • Louver cutting
  • Nibbling
  • Nibbling Machine
  • Slot cutting
  • Purpose of notches
  • Types of notches
  • Straight notch or slit
  • Squarenotch
  • Sheet Metal Works
  • Types of sheet metal works
  • Bending
  • Folding
  • Flaging

Drilling

  • Drilling Machine
  • Types of Drilling Machines
  • Portable Drilling Machine
  • Sensitive Drilling Machine
  • Table
  • Spindle head
  • Upright Drilling Machine
  • Base
  • Column
  • Box type column Upright Drilling Machine
  • Work – table
  • Spindle head
  • Spindle speed and feet mechanism
  • Radial Drilling Machine
  • Base
  • Column
  • Radial Arm
  • Drill Head
  • Spindle speed and feed mechanism
  • Salient Features
  • Drill Bits
  • Tang
  • Shank
  • Neck
  • Body
  • Lip or Cutting Edge
  • Flutes
  • Land
  • Dead centre or chisel edge
  • Point and Point Angle
  • Drill Size
  • Drill Materials

Method of laying out pattern

  • Types of layout pattern
  • Parallel line method
  • Parallel line development method
  • RADIUS LINE METHOD
  • TRIANGULAR LINE METHOD
  • Laying out pattern of cylinder cut obliquely
  • Job sequence
  • Roll forming machine
  • Rolling Forming machine
  • Two – High Rolling Mill
  • Upper roll
  • Non – reversing Type
  • Reversing Type
  • Metal joining methods
  • Shaping of metals
  • Forging
  • Moulding
  • Cutting
  • Joining
  • Metal joining method
  • Riveting
  • Assembling with bolt
  • Seaming
  • Soldering
  • Brazing
  • Welding
  • Limitation / disadvantages of joining method other than welding
  • Comparison between welding and other metal joining methods:
  • Welding method
  • Advantages of welding
  • Different method of welding
  • Fusion method
  • Fusion welding without pressure
  • The joint made is permanent. The common heating source are:
  • Pressure welding
  • Non – fusion welding

High pressure oxy – acetylene welding equipment and accessories

  • Oxygen gas cylinders
  • Dissolved acetylene cylinders
  • Oxygen pressure regulator
  • Acetylene regulator
  • Rubber hose – pipes and connections
  • Safety precaution in handling oxy – acetylene gas welding plant
  • General safety precaution
  • Filler rods for gas welding
  • Filler rods and its necessity
  • Good quality filler rods are necessity to
  • The size of the filler rod is determined from the diameter as
  • Filler rods used in gas welding
  • Definition of filler rod
  • Types of filler rods
  • Factor to be considered for selection of filler rod are
  • Care and maintenance
  • Welding Flux
  • Types of flux coating
  • Cellulosic electrode
  • Rutile electrodes
  • Basic or hydrogen – controlled electrodes
  • Iron power electrodes
  • Composition / characteristics flux
  • Alloying substance
  • Arc stabilizing substance
  • Arc stabilizing substance
  • Deoxidizers
  • Slag forming substance
  • Fluxing / cleaning substance
  • Binding and plasticizing substance
  • These are
  • Purpose of function of flux coating
  • Types of electrodes for ferrous and alloy metals
  • Mild steel electrode
  • Keep carbon as low as possible
  • Chromium
  • Stainless steel electrodes
  • Special purpose electrodes
  • Deep penetration electrodes
  • Contact electrodes
  • Cutting and gauging electrodes
  • Underwater welding and cutting electrodes
  • Low hydrogen electrodes
  • Principle of arc welding
  • Metal arc welding
  • Basic welding position
  • Spot Welding
  • Applications
  • Welding electrodes
  • Introduction
  • Method of flux coating
  • Storage of Electrodes
  • Drying electrodes
  • Indication of electrodes affected by moisture
  • Weld symbol and welding symbol – Description and uses
  • Necessity
  • Elementary symbols
  • Supplementary symbols
  • Defects in welding – its effects
  • Introduction
  • Definition of weld defect / fault
  • Effects of weld defects / fault
  • Weld effects may be considered under two heads.
  • External defects
  • Internal defects
  • Distortion and its control
  • Causes of distortion
  • The 3 types of distortion are
  • Straightening by flame heating
  • Inspection of weld ( NDT ) – Visual inspection
  • Necessity of inspection
  • Types of tests
  • Visual inspection ( non – destructive test ):
  • Visual inspection before welding
  • Visual inspection during welding
  • Checkpoints for inspection
  • Necessity of testing welding
  • Types of testing
  • Method of Non – destructive tests
  • Common non – destructive testing
  • Special non destructive testing
  • Liquid penetrate test

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