Lectures 5-6 Processes

Question 1

Cold rolling results in

Answer 1

elongated grains

Question 2

Flat rolling is used to

Answer 2

flatten a slab or sheet

Question 3

Draft in rolling is

Answer 3

amount of thickness reduced

Question 4

Reduction in rolling is

Answer 4

draft expressed as a fraction of the starting stock thickness

Question 5

Shape rolling results in

Answer 5

a non-flat cross sectional area work

Question 6

Thread rolling is used to

Answer 6

create a thread on a work

Question 7

Pro of rolled threads

Answer 7

the grain of the metal will not be broken as it presses them

Question 8

Stretch formingis carried out by a sheet of metal

Answer 8

being clamped on either side and the die presses into the work from below

Question 9

Peening is carried out by

Answer 9

shooting lots of high speed metal balls on the surface

Question 10

Why is peening important?

Answer 10

As it allows both of the surfaces of a sheet to be in compression

Question 11

Conventional spinning is carried out by

Answer 11

pushing a spinning piece of metal onto the die

Question 12

Superplastic forming uses metals that are able to

Answer 12

stretch by many times of its original length

Question 13

Superplastic forming is carried out by

Answer 13

pressurising a sheet metal from above that is within the dies using a heated gas

Question 14

Bulging uses

Answer 14

rubber to create the mould

Question 15

Bulging allows you to create

Answer 15

bended and curved sheets

Question 16

Hydroforming uses

Answer 16

a hydraulic fluid to create the force onto the sheet to create the shape of the mould placed beneath