Joining

Joining

1. PERMANENT JOINTS

   • Welding and soldering
     • Soft soldering
       • temperatures
         • 400 Cº
       • uses
         • Join tinplate and electrical components.
     • Hard soldering
       • Uses
         • Copper and brass
       • temperature
         • 800 Cº
     • Oxyacetylene welding
       • Uses
         • Sheets of steel in construction
       • temperature
         • 3000 Cº
   • Permanent joints
     • Rivets
       • This is a metal tube with a head at one end.
     • Press fit joint
       • In this type of joint, a pin with a slightly larger diameter
     • Adhesives
       • Hot melt adhesives, waterproof and instant glues.

2. TEMPORARY JOINTS

   • Nuts and bolts
     • Used
       • Washers
     • Don't
       • break and secure
   • Screws
     • Say
       • self-drilling screw
     • screw joins
       • piece to another where there is a threaded hole
   • Threaded stay bolts
     • Bolt
       • grooves at both ends
     • But
       • middle section is smooth
   • Keyed joint
     • Piece
       • metal called a key
     • Join two objects
       • putting the key in a groove
   • Splined shafts
     • Two pieces
       • grooves, they fit together
     • assembled
       • can rotate
   • Sliding joints
     • Objects
       • are joined
     • Can move
       • slide over each other