Hand and commercial processing
Joining processes
Choosing a joining process
Material
Temporary or permanent joint
Strength required
Stiffness needed
Effect o joining method on material
Appearance
Wood and self-tapping screws (temporary)
These types o screws cut their own threads as they are screwed into the material. They are used in
metals i it is thick enough to create a thread.
Permanent joining methods
Joining processes
Choosing a joining process
Material
Temporary or permanent joint
Strength required
Stiffness needed
Effect o joining method on material
Appearance
Wood and self-tapping screws (temporary)
These types o screws cut their own threads as they are screwed into the material. They are used in
metals i it is thick enough to create a thread.
Permanent joining methods
