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Man Poo > LECTURE 1 & 2 > Flashcards

LECTURE 1 & 2 Flashcards

1
Q

What does CNC stand for?

A

Computer Numerical Control

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2
Q

What does DFMA stand for?

A

Design for Manufacturing and Assembly

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3
Q

What are metals with high melting points called?

A

REFRACTORY METALS (Tungsten)

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4
Q

Manufacturing originally meant

A

Made by Hand

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5
Q

Manufacturing now means

A

Made by machine

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6
Q

For a product to be manufactured, it must be

A

Made by a machine in quantity

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7
Q

Modern prototyping facilities are called

A

Makerspaces, because production quantity is low

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8
Q

A car is

A

Assembled from manufactured parts

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9
Q

A design should be manufacturable with

A

the least possible operations, simplest operations possible

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10
Q

Stock Material

A

created by refining and processing raw material into a more convenient form

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11
Q

Bar Stock or Barstock

A

rods of solid cross-section, such as round, half round, square, rectangular, hexagonal, octagonal, and triangular

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12
Q

Strip Stock

A

the special case where a rectangular cross-section is thin and wide

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13
Q

Pipe Stock

A

the special case where the hollow rod has a circular cross-section

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14
Q

Structural Stock

A

Solid rods of compound cross-sections, such as I-Section, T-section, Angle and Channel.

Used primarily for building structures, such as bridges, chassis or gantry, etc.

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15
Q

Rail Stock

A

a special case of structural stock intended as rails for wheels or rollers. Used for locomotive tracks and overhead cranes.

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16
Q

Wire Stock

A

wire-based material, such as rope, cable, and mesh. Used for nails, springs, chain, fencing, concrete reinforcing, etc.

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17
Q

Sheet/Plate Stock

A

thin and wide material. Regarded as sheet if flexible enough to coil, or plate if shipped in flat stacks

18
Q

A design should utilize

A

standard stock material, materials that are compatible with the manufacturing

19
Q

Manufacturing is

A

the manipulation of materials

20
Q

Material Selection includes

A

Mechanical properties
weight
corrosion
tribological properties
thermal properties
electric/magnetic properties
acoustical properties
appearance

21
Q

Amorphous Metals

A

Liquid metal, a metal with a non-crystalline structure, very hard and scratch resistant but brittle

22
Q

Post-transition metals

A

Al, Ga, In, Sn, TI, Pb, Bi, Po

23
Q

Metalloids

A

On the border between metals to non-metals. B, Si, Ge, As, Sb, Te, Po

24
Q

Sn

A

Tin, latin for Stannum, ductile and low strength, corrosion-resistant, non-toxic.
During bending, you can hear a “tin cry”

25
Q

Pewter is made of

A

Sn (Tin) +Sb (Antimony) + Cu (copper)

26
Q

Pb

A

Lead, Pb stands for Plumbum, dark grey-silver color, toxic, malleable, corrosion resistant
well-suited for bullets

27
Q

Bi

A

Bismuth, iridescent-silver color: crystalline

28
Q

Zn

A

Zinc, blush-silver color: satin sheen, somewhat brittle, poor corrosion, toxic only if swallowed, not used in its pure form

29
Q

An alternative name for pot metal

A

monkey metal

30
Q

Mg

A

Magnesium, gray-white-silver color: mirror gloss, light, alkaline-earth metal, non-toxic, reactive, poor corrosion resistance

31
Q

Al

A

Aluminum, light-grey-silver color: satin sheen, moderate strength, good corrosion resistance, good conductivity (thermal & electrical), non-toxic, inexpensive

32
Q

Duralumin

A

Al (~95%) + Cu (4-5%)

33
Q

Cu

A

Copper, Orange-red color: metallic, ductile, good corrosion resistance, excellent conductivity, moderately expensive, toxic to microbes

34
Q

Brass

A

an alloy of Cu+Zn

35
Q

Bronze

A

an alloy of Cu + Sn

36
Q

Ag

A

Silver, silver color: lustrous, anti-microbial uses, superior conductivity & reflectivity

37
Q

Ni & Co

A

Nickel and Cobalt

38
Q

Soft magnetic alloys

A

Ni + Co + Fe

39
Q

Ti

A

Titanium, high strength/weight, best corrosion resistance, expensive, lower stiffness than steel

40
Q

Refractory metals

A

Nb (nobium), Mo (molybdenum), W (tungsten)

41
Q

W

A

Tungsten, non-toxic, weighs the same as gold

Man Poo (31 decks)

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