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Man Poo > U - Spot Welding to Wave Soldering > Flashcards

U - Spot Welding to Wave Soldering Flashcards

1
Q

welding approach where heat can be generated in a workpiece as a consequence of current flow.

A

RESISTANCE WELDING

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2
Q

the most well-known RESISTANCE WELDING method; does not create continuous beads, fuses material together only at localized “spots”

A

SPOT WELDING

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3
Q

welding technique that occurs rapidly and in the small interfacial gap between the sheets, simple to perform, requires minimal PPE, and little operator skills

A

SPOT WELDING

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4
Q

Since there is very little oxygen available in SPOT WELDING, there is no need for…

A
  • FLUX
  • INERT GAS shielding
  • FILLER to fill grooves/create a bead
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5
Q

automation that allows for repetitive SPOT WELDS to be performed in 3D space using relatively simple programming

A

robotic spot welder systems

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6
Q

one way to use resistance welding to create structural fluid-tight joints, essentially spot welding, but with COPPER DISC ELECTRODES as rollers

A

SEAM WELDING

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7
Q

what does HFRW stand for?

A

HIGH FREQUENCY RESISTANCE WELDING

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8
Q

a method of resistance welding used in pipe manufacturing, when the pipe is to be constructed from folded sheet metal continuously welded along the seam

A

HIGH FREQUENCY RESISTANCE WELDING (HFRW)

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9
Q

the addition of this to HFRW increases the inductive reactance of the current path around the inside wall making the outside current larger, and changes the name to HIGH FREQUENCY INDUCTION WELDING

A

IMPEDER

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10
Q

a resistance welding technique that makes it easier to confine the welding to specific locations and can perform multiple spot-type welds simultaneously

A

PROJECTION WELDING

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11
Q

what is the difference between ARC and RESISTANCE welding

A
  • both use electrical power
  • ARC WELDING demands high voltage
  • RESISTANCE WELDING requires high current
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12
Q

2 parts are each connected to an electrode and high voltage is applied (arc), then it is switched to high-current mode (resistance), can weld across an entire surface

A

FLASH WELDING

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13
Q

same basic technique as FLASH WELDING, but is confined to welding fasteners to a plate.

A

STUD WELDING

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14
Q

a crude way of welding that requires elevated temps and is obtained indirectly through the use of a furnace or blacksmith’s forge; not very precise, controllable, low joint strength

A

FORGE WELDING

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15
Q

crude welding method that uses hammering or pressing to fuse the parts together at room temperature, low temp. limits the process to ductile metals

A

COLD WELDING

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16
Q

modern approach to mechanically welding without an external heat source, 2 surfaces are rubbed together generating frictional heat

A

ULTRASONIC WELDING

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17
Q

welding process that rubs surfaces together, the friction is not caused by vibrations, but rather by relative rotation, not hot enough to cause melting

A

FRICTION WELDING

18
Q

one example of where FRICTION WELDING is used in manufacturing

A

to attach the stems to valve heads for internal combustion engines

19
Q

advantages of FRICTION WELDS

A
  • very strong
  • fuse across the entire interface area
  • no fluxes are needed since the friction and rotation strips and slings the oxide
20
Q

one of the best innovative welding methods in recent years; involves plunging a stepped rotating tool

A

FRICTION STIR WELDING

21
Q

what are the parts in FRICTION STIR WELDING

A
  • LOWER PROBE/PIN - forced along the interface and rotated
  • SHOULDER - makes for a flush bead and the process can weld dissimilar metals
22
Q

another process that can weld dissimilar metals, can weld over large plate areas, not restricted to butt welds; for welding one plate on top of another (CLADDING)

A

EXPLOSION WELDING

23
Q

how does EXPLOSION WELDING work?

A

the upper plate is covered in explosives, the explosives are detonated at one end and progressively slam the upper plate onto the lower plate

24
Q

welding method that achieves the same result as EXPLOSION WELDING by using a powerful magnetic pulse, avoiding most hazards

A

MAGNETIC PULSE WELDING (MPW)

25
Q

welding method that uses a non-explosive, but rapidly burning mixture of powdered ingredients similar to that used in the solid rocket boosters of the space shuttle

A

THERMIT WELDING/THERMITE WELDING/EXOTHERMIC WELDING

26
Q

what is the mixture, Thermite, a blend of?

A

iron oxide and aluminum

27
Q

what is another application of THERMITE WELDING?

A

welding lengths of railroad track together to create continuous rail

28
Q

welding method that produced extremely fine welds on both metals and plastics, can weld dissimilar metals, can project the beam into otherwise inaccessible places

A

LASER BEAM WELDING (LBW)

29
Q

what metal has always been a challenge to weld because of its reactivity when molten?

30
Q

what welding methods could be used to weld titanium?

A
  • FRICTION STIR WELDING - no melting occurs
  • ULTRASONIC WELDING - no melting occurs
  • EXPLOSION WELDING - no melting occurs
  • TIG - melting occurs, need special precautions to remove moisture and all contaminants
31
Q

welding method for cases where large interface areas of titanium need to be welded, on precision parts

A

DIFFUSION BONDING/DIFFUSION WELDING

32
Q

conventional welding techniques that leave a HEAT AFFECTED ZONE (HAZ) flanking the bead.

A
  • OXY-FUEL
  • MIG
  • TIG
33
Q

a metal adhesive; uses a filler metal to join the parts together, often performed on STEEL with the lower melting point filler metal being COPPER ALLOY

34
Q

all BRAZING requires the use of FLUX to remove oxides. what flux is typically used?

35
Q

what color is the indicator that the correct temp is attained

A

CHERRY RED

36
Q

a similar process to BRAZING but is usually performed on non-ferrous materials and uses a very low melting point filler metal

37
Q

________ use solder to create leak-proof joints when dealing with copper pipe and fittings.

38
Q

the 2 main differences between SOLDERING and BRAZING

A
  • for soldering, and less expensive PROPANE gas flame is all that is required
  • the acceptance temperature for the solder is indicated by the flux beginning to hiss, bubble, and ooze from the joint (SWEAT JOINT)
39
Q

for ELECTRICAL SOLDER JOINTS, what are the 2 tools used to apply the heat?

A
  • SOLDERING IRON
  • SOLDERING GUN
40
Q

wire with the flux already inside the wire

A

FLUX-CORED solder wire

41
Q

soldering method when mass-producing computer circuit boards, automatically solders an entire circuit board in one-fell-swoop

A

WAVE SOLDERING

42
Q

can be created acoustically using computer controlled sonic transducers, which is more energy efficient than pumping molten metal

A

STANDING WAVES

Man Poo (31 decks)

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