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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