Joining Processes

Question 1

What are the 3 methods of joining

Answer 1

FASTENING - bolts/rivets
WELDING - melting
GLUEING - chemical

Question 2

When are fasteners used

Answer 2

when the joint needs to be disassembled
for cheap applications
quick applications
do not cause the base material to deteriorate

Question 3

what are the 2 welding types

Answer 3

fusion welding - molten metal bridges gap
solid state welding - union by plastic flow

Question 4

what are the 3 important characteristics of fusion welding

Answer 4

power density of the heat source
heat input per length of weld
shielding method - prevent oxidisation

Question 5

What is the function of the electrode coating

Answer 5

acts as a fluxing agent
stabilises the arc
generates protective gas shield
produces slag, protects weld against O2

Question 6

Which weld methods can produce out of position welds

Answer 6

Shielded metal arc weld
Flux core arc weld
Tungsten Inert Gas
Keyhold weld
Spot
Friction stir