Flashcards in Material Joining Deck (57)
Give six methods of joining thermoplastics.
Give two methods of joining thermoset plastics.
Give six factors that determine a suitable joining method?
-Materials being used.
-Temporary or permanent.
-Effect on the material.
What is a temporary joining method?
A method that doesn't damage the materials when the joint is undone.
Give four examples of wood joints.
-Mortise and tenon
What are self-tapping screws?
Screws that form their own thread in a material.
What is an adhesive?
A mixture of chemicals used to bond materials together.
What is a wood screw?
A form of screw designed to join woods together.
What are knock-down fittings primarily used for?
Flat pack furniture
What is spot welding?
A form of resistance welding in which a current fuses two components together.
What is a permanent joining method?
A method that damages the materials when the joint is undone.
What is crimping?
A method used to join thin sheets of metal together achieved by folding the materials together.
What is soldering?
A method used to join wires and pipes using a low melting point filler.
Give three joining processes involving heat.
What are soft solders commonly used for?
Joining electronic components
What are hard solders commonly used for?
Joining products requiring additional strength such as copper pipe.
What temperature does soft solder melt at?
What temperature does hard solder melt at?
What is the first stage of soldering?
Grease and dust have to be removed and kept clean using flux.
What is the second stage of soldering?
The surfaces must fit together without large gaps so have to be held together.
What is the third stage of soldering?
A blowtorch is used to heat the material around the joint then the solder rod is held on the material.
What is the fourth stage of soldering?
The joint is then allowed to cool.
What is the first stage of aluminium welding?
The components are cleaned using steel wool.
What is the second stage of aluminium welding?
Each component is coated with the filler material and the material is heated, melting the filler.
What is the third stage of aluminium welding?
The material is abraded to allow the filler to fuse with the material.
What is the fourth stage of aluminium welding?
The components are placed together and heated until the joint material melts and the components are joined.
What is the fifth stage of aluminium welding?
The materials are allowed to cool slowly.
What does MIG stand for?
Metal inert gas
What does TIG stand for?
Tungsten inert gas