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Flashcards in Cutting Metals Deck (28):
1

What is Shearing?

Action which cuts sheet metal

2

What are Tinsnips used for?

Cut small pieces of sheet metal

3

What are Bench Mounted Shears for?

Cutting sheet metal, they provide more leverage

4

What are the different ways of Bending sheet metal?

Folding Bars
Bending Machines

5

What are commonly used to bend and form sheet metal?

Presses
They are controlled by Hydraulic Rams which create massive pressure

6

What are Cold Chisels made from?

Steel

7

What are Cold Chisels?

One end is sharp and hard to cut material
Other end is soft to withstand hammer blows

8

What are Drill Bits usually made from?

Carbon Steel OR
High Speed Steel (HSS)

9

What are Twist Drills or Jobbers Drills used for?

Drilling holes in metals and plastics

10

What is used to cut larger holes?

Tank Cutter

11

What is Screw Cutting?

Tapping hole (smaller than the thread) must be drilled into metal before an internal thread can be cut

12

What is a Internal (female) thread usually cut with? What is the process called?

Cut with a Tap, held in a Tap Wrench
Process = Tapping

13

What is a Tap?

Very hard steel tool which makes it's own thread as it's twisted into a hole drilled into the material

14

What is Threading?

Cutting of an external (male) thread

15

What is the tool used for Threading?

Split die - held in die stock so it can be turned

16

What can threads be cut with?

Lathe

17

What happens to Threads in Industry?

They are rolled, hard threaded rollers rotate material and press into shape = form of Cold Forging

18

What is Forging?

Iron and Steel heated until soft
Metal can be reformed by applying force from hammer or press

19

What does shaping by forging ensure?

Ensures that the natural grain flow of the material is used to strengthen the components being made

20

What do blacksmiths traditionally forge metals with?

Hearth to heat iron/steel
Anvil to withstand hammer blows

21

What is the process used for industrial forging?

Drop Forging/Die Forging

22

What is the process of Die Forging/Drop Forging?

A piece of white hot metal placed between 2 dies
Very large force is applied in single blow by mechanical hammer

23

What is cooling?

Similar cold forging process used to stamp out coins and metals

24

What is the general workshop saw for all metals?

Hacksaw

25

What is a Hacksaw?

Teeth available in different teeth per inch (TPI)
20 TPI usually for bench work
Blade tensioned by turning wing nut and changed when worn down

26

What is a Junior Hacksaw?

Usually 32 TPI
Blade tensioned by spring in steel frame, can be changed when worn down

27

What is a Piercing Saw?

Used for detailed/accurate work
Used for jewellery making

28

What does a Powered Hacksaw do?

Uses forwards/backwards motion
Driven by a crank slider mechanism