Joining Processes

Joining Processes

1. Wood Joints

   • Butt Joints
     • Butt Joint
     • Corner rebate or Lap joint
     • Finger Joint
     • Dovetail Joint
     • Dowel Joint
     • Housing Joint
   • Frame Joints
     • Mitre Joint
     • Corner halving Joint
     • Tee halving Joint
     • Cross halving Joint
     • Corner bridle Joint
     • Tee bridle Joint
     • Mortise and Tenon Joint
     • Rebate Joint
     • Groove Joint

2. Metal Joints

   • Soldering
   • Brazing
   • Welding

3. Screws

   • Used mainly for Woods
   • Types
     • Countersunk
       • Most Common
     • Roundhead
       • Used to fit metal fixings to wood
     • Raised Counterhead
       • Used where appearance is important
     • Twinfast
       • Two threads = Greater gripping power
   • Self-tapping Screws
     • Don't require a ready made hole
     • Used mainly for joining metals and plastics
     • As inserted they cut their own hole
   • Different heads
     • Philips
     • Slot
     • Pozidriv

4. Types

   • Permanent
     • Not designed to come apart
   • Semi Permanent
     • Will come apart when required but not designed to do so often
   • Temporary
     • Designed for frequent disassembly without breaking

5. Nuts and Bolts

   • Mainly for metals and plastics
   • Types of bolts
     • Hexagonal head
     • Slot head
     • Cheese head
     • Round head
     • Pan head
     • Allen head
   • Types of Nuts
     • Hexagonal nut
     • Locking nut
     • Wing nut
     • Castle nut
     • Split lock nut
     • Nylock nut
   • Nuts are screwed onto bolts and provide the clamping force

6. Rivets

   • Types
     • Solid
       • Countersunk
       • Flathead
         • Join when countersunk not possible
       • Roundhead
         • When countersunk can weaken material
     • Blind/Pop
       • Weaker
       • Quicker to install, form one side only