Components, joints and adhesives

Components, joints and adhesives

1. Components

   • nails
     • holding together
     • made of mild steel
   • Panel pins and veneer pins
     • hardboard onto wood (backboard)
   • Wood screws
     • joins metals and plastics
   • Machine screws
     • join two or more pieces of metals and plastics
   • Bolts
     • join two or more pieces of metal
   • Set screws
     • have a screw head
   • Pop rivets
     • used when there is only one side available
   • Hinges, catches and locks
     • used on metal,woods and plastics

2. Joints

   • Permanent
     • adhesives, nails, rivets, or one of the heat processes of brazing, soldering or welding.
   • Temporary
     • screw thread, such as screws, nuts and bolts, or one of the many knock-down (KD) fixings.
   • Plastics
     • Moulded
     • Permanent joint, a specialist adhesive, rivets, bolts or machine screws are used.
   • Woods
     • Screws-two pilot holes-smaller than the screw
     • Nails-cheap, easy and has lots of shapes and sizes-drill holes first
     • Frame joints
       • Butt joints
       • Dowelled joint
       • Dovetail joints
       • Finger joints
       • Mitre joints
   • Metals
     • Brazing
       • melting a filler metal or alloy between the components.
         • filler metals used-must have lower melting point than material
     • Soldering
       • Soft soldering-permanent joints- join components to electronic circuit boards.
       • Hard soldering is used for stronger joints
     • Welding

3. Adhesives