2.3 New Methods Of Manufacture

Question 1

What is electrohydraulic forming?

Answer 1

Creating a shockwave, the forms the sheet material into the mould
The shock wave is created by an electrical ark between electrodes that vaporises surrounding water
In a fraction of a second

Question 2

How is the shockwave created in electrohydraulic forming?

Answer 2

From the electrical ark between the electrodes, that vaporises the surrounding water

Question 3

what causes the shockwave in electrohydraulic forming?

Answer 3

the electrical ark between the electrodes which vaporises the water

Question 4

what are the main components of electrohydraulic forming?

Answer 4

electrodes
water
mould
sheet material
thin material wire

Question 5

why use electrohydraulic forming?

Answer 5

• creates complex shapes with fine detail
• can use a wide range of materials
• very fast
• single stage process

Question 6

what is advanced 3D printing?

Answer 6

fusing material powder with a laser layer by layer until a complete objects made

Question 7

advanced 3D printing negatives?

Answer 7

most expensive

Question 8

advanced 3D printing positives?

Answer 8

only way complex shapes can be created when using metal

Question 9

what are the uses of advanced 3D printing?

Answer 9

car and aero industry

Question 10

what are the two types of advanced 3D printing?

Answer 10

SLS, for non metals
SLM, for metals

Question 11

what does SLS stand for (advanced 3D printing)?

Answer 11

selective laser smelting

Question 12

what materials are SLS used on?

Answer 12

non metals

Question 13

what does SLM stand for?

Answer 13

selective laser melting

Question 14

what materials is SLM used on?

Answer 14

metals

Question 15

what is fibre injection moulding?

Answer 15

directly incorporating fibres into polymer

Question 16

what is injection moulding?

Answer 16

injecting molten material into a mould

Question 17

what does molten mean?

Answer 17

heated material from solid case

Question 18

why are the fibres added?

Answer 18

to make the polymer…
- stronger
- stiffer
- lightweight

Question 19

what other material is added the polymers and why?

Answer 19

glass
to increase plastic strength

Question 20

what is physical vapour deposition?

Answer 20

coating of products in a thin film of material, with a surface finish

Question 21

why is physical vapour deposition used?

Answer 21

• strength
• durability

Question 22

what is the process of physical vapour deposition?

Answer 22

• the base material is heated and evaporates
• the vacuum condenses it onto the target material
• leaving a thin layer

Question 23

what is the name of the process where metal is the base material?

Answer 23

electroplating
metal coating

Question 24

laser beam welding positives:

Answer 24

• neat/accuracy
• very smooth
• can use a wide range of materials
• can use thin materials without damage

Question 25

laser beam welding disadvantages:

Answer 25

• expensive
• must be in a clean environment to protect laser

Question 26

what is laser beam welding also known as?

Answer 26

LBW

Question 27

why is laser beam welding used instead of normal?

Answer 27

• stronger and stiffer weld
• lightweight components (welds)

Question 28

what are the 5 new methods of manufacture?

Answer 28

electrohydraulic forming
laser beam welding
physical vapour deposition
advanced 3D printing
fibre injection moulding