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MCHE 3920 Final > Joining and Assembling > Flashcards

Joining and Assembling Flashcards

1
Q

___________ is putting two or more parts together

A

Joining

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2
Q

___________ is the sequence of multiple joining operations to make a product

A

Assembling

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3
Q

Joining and Assembly (J&A) can account for up to ________ of a
products total manufacturing cost and __________ of its total
manufacturing time

A

30%, 50%

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4
Q

_____________are often the points where products fail

A

Joints

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5
Q

What are the 5 types of joining processes?

A

Welding, Brazing, adhesive bonding, Mechanical, Joining using Form

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6
Q

What are the 6 most common joint geometries?

A

Butt, Lap, Sleeve, T, Edge, Corner

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7
Q

___________ welding involves heating material beyond its melting point

A

Fusion

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8
Q

__________________ welding heats the material until it is soft.

A

Solid-State

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9
Q

Welding can generally combine _________ material and can create local joints called __________ welds or continuous ones called ___________________ welds.

A

similar, spot, seam

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10
Q

When welding Stainless Steel and Aluminum, a good selection of _______ is important

A

Alloy

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11
Q

Welding is the most important joining process for _____________ steel which is generally __________________ steel,

A

Structural, Low carbon

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12
Q

Welding can undo __________________ or _________________ and can cause residual stress due to _____________________. It can also cause ____________ which degrades material properties.

A

Work hardening, Heat Treatments, Temperature Gradients, Oxidation

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13
Q

In ___________________________ welding , fuel acetylene is burned with oxygen to ___________ the metal

A

Oxy-acetylene gas welding, melt

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14
Q

What Welding method is best for thin sheets and tubes of aluminum, magnesium and titanium

A

TIG

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15
Q

What welding process is best for thin, low carbon steel products?

A

Oxy-acetylene gas welding

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16
Q

_______________ welding clamps sheet parts (usually low carbon steel) between ________________and discharging a large current

A

Resistance Spot welding, Copper Electrodes,

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17
Q

In Resistance Spot welding, no ______ is needed, it is fast and it can be automated, but ____________ welds are not very strong

A

Filler, spot

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18
Q

_____________ Welding uses a laser to provide heat to make spot or continuous welds and can weld _____material in a single pass. It has a high investment cost and is mostly used with ____________

A

Laser, thick, low carbon steel

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19
Q

___________________ is a relatively new welding method in
which heating is caused by the ___________ of a rapidly rotating
tool with a protruding probe.

A

Friction Stir Welding, friction

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20
Q

Friction stir welding (FSW) is a ___________ process where no filler is used and small welds can be made with ______________, but larger welds need dedicated equipment

A

Solid-state, CNC

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21
Q

Friction stir welding (FSW) was made for making long _______________ welds in _________________ extrusions but is also a common choice for titanium

A

continuous, aluminum

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22
Q

______________ is done by heating the plastic above its glass
temperature (amorphous plastic) or melting temperature
(_______________)

A

Plastic welding, crystalline plastic

23
Q

Welding plastic is mainly done when you need ____________________ bonds

A

Strong airtight

24
Q

What are the two main processes of plastic welding?

A

Ultrasonic and Hotplate

25
Q

___________________ plastic welding uses a piezoelectric element to generate ultrasound that creates enough _________ to allow the interface to be joined

A

Ultrasonic, heat

26
Q

________________ uses a hot metal plate that applies the heat
and then is removed before the parts are ____________

A

Hot Plate Welding, pressed together

27
Q

Soldering is done below __________C and brazing is done at much
_____________ temperatures

A

450C, higher

28
Q

Brazing is typically performed on _______ alloys such as _______

A

copper, brass

29
Q

Brazing and soldering require much ________ heat than welding and therefore do not produce as much thermal distortion or ____________

A

less, residual stress

30
Q

In brazing, lap and sleeve joints will be stronger than
__________ or ________ joints

A

tee, butt

31
Q

what are the two brazing methods?

A

Torch brazing, Furnace brazing

32
Q

_____________: common manual method of brazing in which a skilled worker manipulates a torch and a reel of filler material

A

Torch Brazing

33
Q

_______________: Is when the parts are prepared, mounted in a jig with the filler material applied in the right places, and placed in a furnace where the filler material permeates the joint

A

Furnace Brazing

34
Q

Soldering creates electrically _____________ joints and is used in electronics and _______________________

A

Heat Exchangers

35
Q

Adhesives are slow but are the method of choice for combining _______________

A

composites

36
Q

Adhesives should be loaded in ______________ only

A

Shear

37
Q

Adhesives are weak in tension so _________ and ____________ joints work best

A

Lap, sleeve

38
Q

What are the 4 types of adhesives?

A

Drying Adhesives, multi-component reactive adhesives, single-component reactive adhesives, hot melts

39
Q

________________ use the dispersion of active adhesive in a solvent.
When the solvent evaporates, the adhesive hardens.

A

Drying adhesives

40
Q

______________________________ Are mixtures of two different
compounds that when mixed set off a chemical reaction that will harden the mixture.

A

Multi-component reactive adhesives

41
Q

_________________________________ are single compounds that
cause a chemical reaction when subject to an external trigger (e.g., UV light, heat, moisture). Epoxies are an example.

A

Single-component reactive adhesives

42
Q

___________________ are thermoplastics that are heated until they
liquefy, applied to a surface and allowed to cool
o Allow for higher production speeds and do not require chemical reactions (so less fumes)

A

Hot Melts

43
Q

Bolts can be used with a nut in a _______________ or by
themselves in a ___________________

A

through hole, blind hole

44
Q

Bolts are most often made of ________________

A

Carbon Steel

45
Q

Bolts are often forged by ________________

A

Cold Heading

46
Q

Unlike bolts, screws do not have ______________ and transmit
force in shear

A

shanks

47
Q

Screws are _____________, that is they form their own thread
when screwed into a hole

A

self-tapping

48
Q

Rivets are permanent mechanical fasteners that start out as shanks about __________ thinner than the hole in the two parts needing to be joined

A

10%

49
Q

___________ rivets require access to just one side of the joint, but are relatively _____________

A

pop, weak

50
Q

Form closures can be divided into two categories based on whether they induce __________ or ______________ deformations

A

elastic, plastic

51
Q

_____________is a form closure method where folding two metal sheets over each other like hooks to create a continuous seam

A

Seaming

52
Q

______________, often known as press fits, rely on
compressive force and friction at the joint to hold it together
elastic plastic

A

Clamp Fits

53
Q

_____________: Like seaming, but locally interlocks two pieces of metal together

A

Clinching

MCHE 3920 Final (10 decks)

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