Metal Work/Engineering Flashcards
Name the 3 taps in order
Tapper
2nd
Plug
What tool do you use to hold the taps?
Tap wrench
What do you use a tap for?
Internal threading
What do you use a die holder for?
external threading
Name the process for internal threading
- still pilot hole
- put the tap in tap wrench
- cutting compound on the hole
- turn clockwise to begin
- go backwards every few turns
- repeat the last few steps
Reasons why to slow down lathe and drill
The material
Size of the object
The process
Name the 4 types of rivets
Counter sink
Round head/snap head
Flat head
Pop rivet
Why is the taper tap used first in internal threading?
It is the thinnest and create space for the next taps
What can be done to ensure a good thread is produced?
Cutting compound
Tap is straight
Used in the laith
What is a blind hole?
A hole with a bottom or 1 entrance
What is a flat file used for?
To remove material off of metal
What is an engineer square used for?
To find 90* angle to then draw a straight line
What is marking blue used for?
To make marked out lines stand out more
What is a height gauge use for?
Used to measure the height of metal accurately
What is an odd leg caliper used for?
To mark straight lines parallel to the edges
What is a centre punch used for?
To dent metal so drilling is easier
What is a ball pin hammer used for?
To hit centre punches and round headed rivets
What are spring dividers used for?
To mark out arks and circles
What is a pedestal/ pillar drill used for?
To creat a hole in metal
What are tin snips, notchers and guillotines used for?
To cut into sheet metal
Name the 4 vices
Hand vice
Machine vice
Engineer’s vice
Tool makers clamp
Name the lathe tools
Parting Tool Round nose RH knife LH knife Revolving centre Centre drill Knurling Tool Jacobs chuck
What is a snap and rivet set?
This is the tool used when riveting to shape the rivet heads
What is malleability?
This is the ability of a material to withstand being hammered, rolled or bent without the material breaking
Name some pure metals
Copper Iron Tin Lead Gold Silver
Name some alloys
Steel
Duralumin
Brass
Bronze
Name some ferrous metal
Cast iron
Mild steel
High carbon steel
Name some non-ferrous metals
Aluminium Copper Brass Duralumin Lead Tin Zinc
Name some forms of supply
Round rod Sheet Squares Round tube Flats Square tube Hexagonal bar Rectangular tube Octagonal bar Angle
What does iron + carbon make?
Steel
What happens when you heat up metal and let it cool down slowly?
It becomes softer
More malleable
Recrystallisation/grains regrows
What happens when you hit hot metal with a hammer?
Gets rid of dislocations and Removes unwanted carbon from the metal
What happens when you cold work metal?
The grains in the metal fill the dislocations and get squeeze together. So it becomes thinner and harder
Why would you anneal metal?
So hard brittle metal becomes more malleable, softer and the grains regrows
How do you anneal metal?
Heat the metal up to a certain temperature and allow it to cool slowly
Name 2 ways to cold work metal
With a hammer or rolling machine
What is hot working?
When you heat up metal and bash it with a hammer to break up and remove carbon from it
What is everything made of? Literally
Atoms
What is a dislocation?
When there is a gap in the atom pattern/matrix
What do you call the atom pattern?
Lattice or matrix
What is a unit cell?
Atoms joined together to make a cube
What do you call the area between grains?
Grain boundaries
What is the chemical symbol for iron?
Fe
