Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

DT Year One > metals > Flashcards

metals Flashcards

1
Q

what are six wasting processes of metals?

A

-Milling
-Turning
-Flamecutting
-Plasma cutting
-Laser cutting
-Punching and stamping

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How does milling work?

A

-work to be machined is clamped onto table of machine
-can be run in XY or Z direction to cut slots, shaped edges, or thread holes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are four milling types called

A

-face milling
-end mills
-fly cutter
-slot cutter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is turning carried out on?

A

A centre lathe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How does turning work?

A

A bar can be held in rotating truck and machines to reduce diameter and to face off end, thread and drill
-material is machined by cutting tools held in tool post- can be moved in and out along bar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the two types of turning carried out on?

A

-CNC lathe
-manually

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what does turning using CAD allow

A

-complex and accurate shapes to be repeated quickly and efficiently

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How does flamecutting work?

A

-it uses Oxy acetylene, gas and flame, cutting torch to deliver intense and focused flame above 3500° C
-It has an additional jet of oxygen to intensify the flame

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What’s the disadvantage of flamecutting?

A

It’s difficult to maintain parallel line with high levels of tolerance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the excess material created by flamecutting called?

A

dros material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is flamecutting used to cut?

A

low carbon and alloy steel plate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is plasma in plasma cutting?

A

-Superheated, ionised gas that is electrically conductive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How does a plasma cutter work?

A

plasma cutter will use conductive gas to transfer the energy from the power supply to a conductive material such as a steel plate. It’s heated by plasma to 28,000° C which burns and blows the material away. The cut is fast and clean.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is laser cutting used for?

A

Used in industry for precision cutting metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

where does lasercutting get its power from?

A

Laserbeam thats directed through optics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what does a laser head contain on a laser cutter?

A

A lens that focuses the laser into a fine beam for cutting and engraving, giving a very fine tolerance of less than 1 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are the advantages and disadvantages of laser cutting?

A

it’s accurate and uses less energy than plasma cutting. However it can’t cut very thick material. It’s typically used to cut flat sheet material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is punching and stamping

A

it uses computer controlled machines that stamps out sections of sheet material by using a sharing action on sheet of metal place between upper tool (punch) and lower tool (die)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what is punching and stamping usually used for?

A

-Small and medium size production
-And processing metals from 0.5 mm to 6 mm thickness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what are seven types of turning?

A

-Facing
-Drilling
-knurling
-Taper turning
-parallel turning
-parting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what are five metal forming methods?

A

-Press forming and spinning
-cupping and deep drawing
-Forging and deep forging
-Casting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what is a stock form and products produced in press forming?

A

SF: sheet
Products: metal sheets, car body panels, and boxes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what are key features of press forming?

A

-shapes sheet metal into 3-D forms
-often uses robotics for lifting sheets
-Mass/large scale batch production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the stock form used for spinning and the products it produces?

A

SF: sheet
Products : Body of kettle, saucepans, and metal light shades

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Key features of spinning

A

-Product may show parallel lines, where sheet has been forced onto mandrel
-Mass/small batch production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

what is the stock form and products produced using cupping and deep drawing?

A

SF: sheet
Product : tube like shapes, like fire, extinguisher and drinks cans

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what are key features of cupping and deep drawing?

A

-Starts with metal blank
-Metal is stretched into shape
-High initial tooling cost
-Large scale mass/continuous production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

what is a stock form and products produced using drop forging?

A

SF: billet
Product : spanners and pliers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

what are key features of drop forging?

A

-used for products that need to be tough/hard
-Maintains internal grain structure, which retains strength
-Hot metal billet shaped on anvil/die then pressed into shape and cooled
-Suitable for mass production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

what is the stock form and product produced using wrought iron forging?

A

sf: bar
Products : decorative metal work like gate scrolls and fencing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

what are key features of wrought iron forging

A

-uses wrought iron which has a carbon content of 0.08%
-Hand/hydraulic press
-One off/small batch production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

bending stock form and products produced?

A

sf: sheet/plate
Product : seams on metal edges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Key features of bending

A

-Doesn’t include punching/trimming of metal
-Can be carried out in school workshop
-Large scale batch in industry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

stock form and products of rolling?

A

sf: billet
Product : hot rolling- angle bar, beam railway tracks
Cold rolling -filing cabinets, chairs and drums

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

what are key features of rolling?

A

-hot rolling results in uniform, mechanical properties, with no deformation or stresses
-surface coated with carbon deposits, which must be removed using acid pickling
-Cold, rolling results in a material that has hire tolerance and better surface finish

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What is a stock form and products produced using sandcasting?

A

sf: molten metal from billet
Products : railway carriage, wheels, vices, and postboxes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

what are key features of sandcasting?

A

-Labour intensive process
-Not a high-quality surface finish
-Suitable for one off/small batch production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

stock form and products produced using gravity diecasting

A

sf: molten metal from billet
products: Alloy wheels, engine components and doorhandles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Key features of gravity diecasting?

A

-Low melting point, metals like aluminium and zinc based alloys are used
-Relies on gravity to help metal flow into mould
-Used for thicker mould sections
-Large batch/mass production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

stock forms and products produced using pressure diecasting

A

sf: molten metal from billet
products: toy cars, collectible figures and door handles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

Key features of pressure diecasting

A

-Intricate detail designs
-Low, melting point metal such as aluminium and zinc based alloys
-molten metal stored in a chamber, then shot of molten metal is forced into die
-fast process
-Large batch/mass production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

what is a key feature Of a pressure diecasting in a cold chamber

A

-Molten metal labelled into shot chamber, and hydraulically pushed into chamber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

what is stock forms and products produced in investment casting

A

sf: molten metal from billet
Product : cast jewelry, hip replacement joints

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

Key features of investment casting?

A

-used for intricate/awkward shapes that would be difficult/ impossible to mould using any other casting process
-High-quality excellent finish
-Wax patterns are cast from master mould
-Repeatable and high-quality

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

what are the 7 joining methods of metals

A

-riveting
-brazing
-hard + soft soldering
-oxy-acetylene
-spot welding
-MIG welding
-TIG welding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

what does MIG welding stand for

A

metal inert gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

what does TIG stand for

A

tungsten inert gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

what’s MIG welding used to weld

A

-thin gauge metals like aluminium and steel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

how does MIG welding work

A

-wire electrode melts in ark and fills gap between metals
-Welding torch is gently swelled to form a bead of weld
-The electrode wire is stored on a real and is fed
-Inert gas shield the area being joined to prevent oxidisation in the weld

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

What type of of production is MIG welding used for?

A

one off

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

What type of inert gas is used in MIG welding?

A

CO2 or argon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

What does MIG welding use?

A

a consumable wire electrode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

what is MIG welding Used to make?

A

Bike frames and climbing frames

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

what is TIG welding Used to weld

A

-Stainless steel and aluminium and copper alloys

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

how does TIG welding differ from MIG welding?

A

it’s an electric arc welding process but electrode made out of tungsten doesn’t melt in the process of filler is added separately

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

what does TIG welding gas shield use?

A

-Argon or helium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

what does TIG welding give greater control of?

A

Where the world is going, meaning increased accuracy, so the joint will be stronger

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

What products does TIG welding used to make?

A

Stainless steel ladders for boats

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

what is spot welding used to weld?

A

Mild steel sheet metals at the point along in length without using a filler

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

What does spot welding need to access on the metals for it to work?

A

Both ends of the metal

61
Q

what is the sheet held between in spot welding?

A

Two copper electrodes that form a world when charged electrodes make contact with metal

62
Q

what two things are applied to the area in spot welding

A

Heat and pressure

63
Q

What are the advantages of spotwelding? and a disadvantage

A

it’s fast needs no filler and low skill. However, it only works on a thin gauge

64
Q

what is oxy-acetylene welding used to weld

A

Mild steel sheet, tube or plate

65
Q

what does oxy-acetylene use

A

a steel filler rod

66
Q

what does oxy-acetylene welding mix

A

Two high-pressure gases forming an intense flame, which can then be adjusted by changing gas and oxygen, enabling flamecutting, welding or brazing

67
Q

what is Oxy acetylene welding Useful for?

A

Quick repair jobs in remote locations where there’s no electric power supply

68
Q

what does soft soldering use?

A

-Uses low melting point metals(solder) to join metals
-a filler material of a lower melting point than the metal being formed typically tin or lead

69
Q

what does hard soldering use?

A

-Higher temperatures to join precious metals

70
Q

what must be applied to the metal in hard soldering

A

A flux must be applied to prevent metals oxidising. It also allows solder to flow.

71
Q

what is brazing?

A

it used a lower temperature than welding, so suitable to join in gauge mild steel tubes or bars
-used to join dissimilar metals

72
Q

What does brazing use?

A

-a brazing rod that melts around 850° C so isn’t strong
-Uses Oxy acetylene, gas or compressed air brazing hearth

73
Q

what production is brazing used for

A

one off / small batch

74
Q

what is riveting

A

-semi permanent joint, used to join a sheet or plate
-rivets are metal fasteners that have a head at one end and a shaft or tail at the other
-It uses two pieces are overlapped and drilled, and the end of the shaft is hammered over to join

75
Q

What is pop riveting?

A

A quick and easier joint to use, but not as strong
-Uses a pop rivet gun

76
Q

what is pop riveting good for?

A

Where the underside of a joint is inaccessible

77
Q

what is pop riveting used in?

A

Used in aircraft production to join sheet aluminium to structural parts

78
Q

what are three temporary joining methods

A

Self tapping screws
Machine screws
Nuts and bolts

79
Q

how do you self tapping screws work?

A

They cut their own thread as they are screwed into sheet metal and some plastics, but a pilot hole is drilled first

80
Q

what are machine screws?

A

used to join thicker metals, such as inspection covers on motor or gear housing
-Define thread goes the whole length of the shaft

81
Q

what needs to be drilled in order for machine screws to work

A

for the top part to be joined a large clearance so will have to be drilled longer than the bolt thread. The bolt goes through this and is screwed into a threaded hole in the second piece and is often tightened with a spanner.

82
Q

how does a nut and bolt work?

A

Goes all the way through both pieces, and then the nut is tightened to hold both pieces in place

83
Q

what are five types of nut and bolt?

A

-cheese head
-Counter sink
-Round head
-Hex head bolt
-Socket head

84
Q

what are the five stock forms of metal?

A

-Sheet
-Plate
-Bar
-Tube form
-structural angular

85
Q

what is coppers ore

A

chalcopyrite

86
Q

what is aluminium ore

A

bauxite

87
Q

what’s tins ore

A

cassiterite

88
Q

what’s zincs ore

A

zinc blende

89
Q

what is a ferrous metal?

A

A metal containing mainly iron and carbon

90
Q

what’s a non-ferrous metal

A

Metal that doesn’t contain any iron

91
Q

what is an alloy?

A

A metal made from two or more metals or one metal and one non-metal

92
Q

What are seven non-ferrous metals

A

-aluminium
-Copper
-Zinc
-Gold
-Silver
-Titanium
-Tin

93
Q

what are the properties and characteristics of aluminium?

A

Lightweight
Ductile
Malleable
Corrosion resistant
Electrical/thermal conductor
Can be MIG/TIG welded

94
Q

what is the uses of aluminium?

A

Drinks cans
Aircraft bodies
Window frames
Bike frames

95
Q

What are the properties/characteristics of copper?

A

ductile
Malleable
Tough
Corrosion resistant
Good electrical/thermal conductor
Can be soldered/brazed

96
Q

what are the uses of copper?

A

Electrical wiring
Printed electrical circuits
Water pipes
Central heating pipes

97
Q

what are the properties/characteristics of zinc?

A

Low melting point
Good corrosion resistance

98
Q

What are the uses of zinc?

A

buckets
Farm gates

99
Q

what are the properties/characteristics of gold?

A

Malleable
Ductile
Corrosion resistance
Can be soldered

100
Q

What is gold uses?

A

jewellery
Electronic components
Connectors

101
Q

what are the properties/characteristics of titanium?

A

Hard
Similar strength to steel but more lightweight
High corrosion resistance

102
Q

what is titanium uses?

A

Hip replacements
Joint replacements
Golf clubs

103
Q

what are the properties/characteristics of tin?

A

Ductile
Malleable
Low melting point
Corrosion resistance

104
Q

what are the uses of tin?

A

Soft solder
Coatings for food cans
Rarely used in pure form

105
Q

What is silver properties/characteristics?

A

malleable
Ductile
Corrosion resistant
Can be soldered

106
Q

what is silver used for?

A

Jewellery
Cutlery
Platings of other metals

107
Q

what are six ferrous metals

A

-Low carbon steel
-Medium carbon steel
-Cast iron
-Stainless steel
-High-speed steel
-die steel

108
Q

what are the properties/characteristics of low carbon steel?

A

Ductile
High tensile strength
Tough
Malleable
poor corrosion resistance

109
Q

what are the uses of low carbon steel?

A

nuts
bolts
washers
screws
car bodies

110
Q

what are the properties/characteristics of medium carbon steel?

A

Harder than low carbon steel
Less ductile
Malleable
Tough

111
Q

What is the carbon content in medium carbon steel?

A

0.3 to 0.7%

112
Q

what are the uses of of medium carbon steel?

A

Springs
Gardening tools, like trowels and forks

113
Q

what are the properties/characteristics of cast iron?

A

Hard outer skin, but brittle core
good Under pressure

114
Q

what is a carbon content in cast iron?

A

3.5%

115
Q

what are the uses of cast iron?

A

Disc brakes
Machine parts
Engine blocks

116
Q

what are the uses of stainless steel?

A

Sinks
Kitchenware
Cutlery

117
Q

what are the properties/characteristics of stainless steel?

A

Tough
Hard
Corrosion resistance

118
Q

what is the composition of stainless steel?

A

18% chrome
8% nickel

119
Q

what are the properties/characteristics of high-speed steel?

A

Hard
Tough
High level of resistance to frictional heat

120
Q

what is the composition of high-speed steel?

A

18% tungsten
4% chromium
1% vanadium
0.5-0.8% carbon

121
Q

what are the properties/characteristics of die steel

A

hard
tough

122
Q

what are the uses of die steel

A

-blanking punches/dies
-extruder dies
-fine press tools

123
Q

what are the properties/characteristics of bronze

A

tough
corrosion resistant
can be cast

124
Q

what is the metal composition of bronze

A

-90% copper
-10% tin

125
Q

what are the uses of bronze

A

statues
coins
bearings

126
Q

what are the properties/characteristics of brass

A

corrosion resistant
Good electrical/thermal conductors
Low melting point
Casts well

127
Q

what is the metal composition of brass?

A

65% copper, 35% zinc

128
Q

What are the uses of brass?

A

boat fitting
Door furniture
Cast valves and taps
Ornaments

129
Q

what are the properties/characteristics of duralium

A

equivalent strength to mild steel, but more lightweight
Ductile
Becomes harder as its worked

130
Q

what is a composition of duralium

A

aluminium with 4%, copper, 1% magnesium and manganese

131
Q

uses of duralium

A

aircraft parts
vehicle parts

132
Q

what are the properties/characteristics of pewter

A

malleable
Low melting point
Casts well

133
Q

What is the metal composition of pewter?

A

85 to 99% tin and the rest is copper and antimony

134
Q

what are the uses of pewter?

A

Flasks
Goblets
Photo frames
Sport trophies

135
Q

What are mechanical properties?

A

Characteristics a material displays when subjected to an external force

136
Q

five examples of mechanical properties

A

-Hardness
-Toughness
-Malleability
-Elasticity
-Tensile strength

137
Q

What are physical properties?

A

measurable characteristics a material displays

138
Q

seven examples of physical characteristics

A

Density
Melting point
Thermal conductivity
Electrical conductivity
Resistance to corrosion
Ability to take finishes
Ability to be alloyed and joined with heat

139
Q

what are five different types of metal strength?

A

Compressive
Tensile
Bending
torsional
Shear

140
Q

what is case hardening

A

Used to harden outer layer of steel while maintaining a soft core
-Used for steel with a low-carbon content

141
Q

What is normalising metals?

A

form of annealing for Ferris metals, which has a faster according

142
Q

what is annealing

A

Application of heat to relieve internal stresses, making the metal more malleable and easier to work with

143
Q

What is hardening metals?

A

heating, medium or high carbon steels to a given temperature
-Then rapidly called via quenching and then heating a set temperature to remove excess hardness

144
Q

what is tempering metals?

A

Used to reduce brittleness and increase toughness after metal has been hardened
temperature judged by colour of oxide layer
-colour is reached the piece of metal is air cooled

145
Q

What are three hardness tests for metals

A

Rockwell
Brinell
vickers

146
Q

How is it a Rockwell test carried out?

A

-preload is applied to material sample, using a diamond indenter which breaks through the surface of material
-Additional loaders applied to test material and held for predetermined length of time
-Load is released
-Distance between preload and applied load is measured

147
Q

why is diamond used in rockwell test

A

Diamond is used as it won’t deform under load

148
Q

how does a brinell test work?

A

-Harden standard size steel ball is forced into material surface using a preset load
-Diameter of indent in surface is measured

149
Q

how is the Vickers pyramid test carried out?

A

-Uses a diamond square based pyramid to indent surface of material
-Microscope used to measure the size of indent
-Used for very hard materials

DT Year One (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions