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MENG 1005: Workshop Technology > WELDING > Flashcards

WELDING Flashcards

1
Q

What steps does the consolidation process consist of?

A
  • Welding
  • Brazing
  • Soldering
  • Fasteners
  • Adhesives
  • Shrink fits
  • Slots and tabs
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2
Q

What is welding?

A

Welding is the consolidation of two materials by means of temperature nd/or pressure to cause materials to diffuse at the joint. Welding is usually used on metals and thermoplastics but can also be used on wood

Welding is the most common consolidation process

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3
Q

What is oxyfuel gas welding (OFW)?

A

Oxyacetylene

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4
Q

What are some common types of defects with welding?

A

Some common welding defects are:
* Cracks - cavities
* Inclusions - unacceptable weld shape
* Incomplete fusion - incomplete penetraion
* Arc strikes - spatter
* Metallurgical changes - excessive distortion

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5
Q

What are the types of fusion welds?

A

The types of fusion welds are:
* Bead welds
* Groove welds
* Fillet welds
* Plug welds

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6
Q

What is a bead weld?

A

A weld bead is created by depositing a filler material into a joint between two pieces of metal.

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7
Q

Where are bead welds used?

A

Bead welds involve limited penetration so they are used on thin materials or surface modification.

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8
Q

What is a groove weld?

A

A groove weld is a welding technique used to join two pieces of metal together in a seam.

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9
Q

Where are groove welds used?

A

Groove welds are used on thick materials, requires joint penetration and can be used for single and multiple passes.

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10
Q

What are tee welds?

A

Fillet welding refers to the process of joining two pieces of metal together when they are perpendicular or at an angle.

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11
Q

Where are fillet welds used?

A

Fillet welds are used for tee, lap and corner joints

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12
Q

What are plug welds?

A

A plug weld, also known as a rosette weld, is a process that fuses two metals together by making a weld inside small circular holes

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13
Q

What is back wellding?

A
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14
Q

What distortions or warpage may occur during welding operations?

A
  • V-groove butt weld where te top of the joint contracts more than the bottom
  • One-sided fillet weld in a T-joint
  • Two-fillet wel in a T-joint with a high vertical web
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15
Q

What is the weldability of a material?

A

Weldability is a measure of how easy it is to make a weld in a particular parent material, without cracks, with adequate mechanical properties for service, and resistance to service degradation.

The weldability of a material is only a relative rating.

Weldablity tables such as 30-2 give guidlines for a umber of materials and processes

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16
Q

What factors must you consider to produce a proper weld?

A

The faactors you must consider are:
* Selection of the process and fillers
* Design of the joint
* Parallel considerations apply to brazing and soldering

17
Q

What is brazing?

A

Brazing is a metal-joining process in which two or more metal items are joined together by melting and flowing a filler metal into the joint, with the filler metal having a lower melting point than the adjoining metal.

Unlike welding, brazzing does not involve melting the workpieces

18
Q

What is soldering?

A

Soldering is a process in which two or more items are joined by melting and putting a filler metal into the joint, the filler metal having a lower melting point than the adjoining metal.

Unlike welding, brazzing does not involve melting the workpieces

19
Q

Draw the oxyacetylene torch

A
20
Q

What is oxyfuel-gas welding and cutting?

A

Oxy-fuel welding and oxy-fuel cutting are processes that use fuel gases and oxygen to weld or cut metals.

21
Q

Draw the oxyacetylene cutting torch

A
22
Q

Draw the underwater cutting torch

A
23
Q

What is flame straightening?

A
24
Q

DRaw the arc welding schematic

A
25
Q

What is arc weling?

A

Arc welding is a welding process used to join two metals by using electricity to heat and melt metals to bind them togeter.

26
Q

What are the three types of metal transfer during arc welding?

A

The three types of metal transfer during arc welding are:
* Globular
* Spray
* Short circuit

27
Q

What is shielded metal arc welding (SMAW)?

A
28
Q

What are the rquirements of SMAW (e.g current)?

A
29
Q

What is flux cored arc welding? Draw the schematic.

A
30
Q

What are the requirements for flux-cored arc welding?

A
31
Q

What is gas arc welding? Draw the schematic

A
32
Q

What are the requirements of gas arc welding?

A
33
Q

What is submerged arc wedling? Draw the schematic

A
34
Q

What are the requirements of submerged arc wedling?

A
35
Q

What is stud wedling and what tools are reqired to carry it out?

A
36
Q

What causes warping in welding?

A

MENG 1005: Workshop Technology (9 decks)

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