✅3.10 - Joining and assembly Flashcards
What is temporary joining?
A join designed so that it can be easily taken apart
What are some common forms of temporary joining?
Screw threads / wood screws / machine screws / knock-down fittings
What is permanent joining?
A join that is not required to be separated and cannot be taken apart
What are some common forms of permanent joining?
Welding / brazing / soldering
What are jigs and formers?
Holding devices used to hold individual pieces together when joining them to make sure that they are accurately assembled
What is brazing?
Joining different metals using heat
How do you braze metals?
With a brazing torch
What is soldering?
A low-temperature permanent joining technique that is weaker. It is used to join metals and electrical components and wires in electrical products
What is welding?
Metals are heated to extreme temperatures until they are melted. Once they have cooled and solidified, they are joined together
What are the two types of welding?
Gas welding: used to join mild steel and relatively inexpensive
Electric welding: expensive but create a better quality finish
What is riveting
A permanent method of joining, where a small piece of metal is inserted into a hole in each of the components being joined. It is then deformed to an extent that it cannot be removed
How do you create a rivet joint? (many many steps oml)
- Using the domed hollow in a snap and set, rivet head placed in it with the shank of the rivet pointing upwards. The two pieces of material to be joined are then slide over this
- Another snap and set placed on top and is hammered down -> forces pieces together and makes sure that theres no gap between them
- The rivet shank is cut to length using a pair of pinches, pliers or bolt cutters
- Using the flat surface on a ball pein hammer, the exposed end of the rivet is deformed
- Hammer is turned over and is roughly shaped into a dome
- A second snap and set is placed over the slightly deformed end of the exposed rivet and is hammered down. The domed hollow in the snap and set shapes the end of the rivet into a smooth regular dome
omg good job blythe and trinity idk if we need to know this but that was a lot i want to cry i wish we could add pictures
What is a pop rivet?
Contemporary technique and uses a rivet gun to insert and expand the rivet into a pre drilled hole in the sheet materials
What are knock-down fittings (KD)
Used in flat-packed furniture and is designed to be used with a screwdriver for metals, woods, or plastics.
What are some pre-manufactured components?
Nails, screws, wood screws, nuts, bolts, hinges, catches
