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WTAP > HOT WORKING PROCESSES > Flashcards

HOT WORKING PROCESSES Flashcards

1
Q

Shaping metals at elevated temperatures above recryztallization temperature

A

Hot working

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2
Q

Benefits include: Improved Ductility, reduced strength, and ability to form complex shapes

A

Hot working

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3
Q

Common Applications: Forging, Rolling, Extrusion, and Drawing

A

Hot working

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4
Q

Process: Pulling a metal through a die to reduce its cross-sectional area

A

Hot Drawing

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5
Q

Types: Wire ________, Tube _________, and Rod ____________

A

Hot Drawing

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6
Q

Tube is pulled through a die with a mandrel inside to reduce cross sectional area

A

Tube Drawing

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7
Q

Process: Shaping a metal blank into a hollow form by forcing against a rotating mandrel

A

Hot Spinning

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8
Q

Process: Joining two pieces of metal together by applying heat and pressure

A

Pipe Welding

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9
Q

Process: Creating a hole in a metal sheet using a punch and die

A

Hot Piercing

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10
Q

Types: Butt Welding, Fillet Welding, Groove Welding

A

Pipe Welding

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11
Q

Metal is deformed plastically above recryztallization temperature but below the burning point.

A

Hot working Process

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12
Q

1/3 or 1/2 of the melting point of the metal

A

recrystallization temperature

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13
Q

Classifications: Rolling, Forging, Extrusion

A

Hot Working Processes

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14
Q

Metal is heated above recrystallization temperature and then passed through pair of rollers, rolling in the opposite direction but with the same speed to flatten it, lengthen it, and reduce cross-sectional area and obtain uniform thickness

A

Hot Rolling

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15
Q

Process in which metal is plastically deformed above the recrystalization temp. in the operation. It is commonly used to manufacture metal plates and sheets

A

Hot Rolling

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16
Q

Involves shaping of metal through localized compressive forces delivered through manual hammer or hammer machine and dies

A

Metal Forging

17
Q

Process: Heating, deforming, and providing shape to the piece of metal using manual hammer or hammer machine and dies

A

Metal Forging

18
Q

Metal is heated above recrystalization temp. and pushed through the die of the desired cross-section to convert to the desired shape

A

Hot Extrusion

19
Q

Type of Extrusion:
- metal is forced to flow in the direction of feed of punch. Punch moves towards die during extrusion

A

Direct Extrusion

20
Q

Common Product: Buckets, Bowls, and Lampshades, Brass trumpet,

A

Hot Spinning

21
Q

Type of Extrusion:
Required higher force due to higher friction between billet and container

A

Direct Extrusion

22
Q

Type of Extrusion:
also known as backward extrusion

A

Indirect Extrusion

23
Q

Type of extrusion:
the metal billet is stationary and the die moves towards it. The die is attached to a hollow ram that fits over the billet. As the ram pushes the die against the billet, the metal flows backwards through the opening in the ram

A

Indirect Extrusion

24
Q

EXAMPLES:
1. Nails, screws, bolts, and other
fasteners
2. Roofing, appliances
3. Frames, wheels, and
suspension parts.
4. Structural beams for buildings
and frameworks
5. Seamless Pipes and Tubes
6. Steel Rails
7. Metal Bars and Rods
8. Steel Sheets and Plates

A

Hot Rolling

25
Q

EXAMPLES:
1. Gears
2. Automotive parts
3. Tools
4. Itak hehe (sundang basta amo
yan)

A

Hot Forging

26
Q

Commonly used for: aluminum
and copper & steel rods, tubes,
and structural components.
o It is essential in industries such as
aerospace, automotive, and
construction.

A

Hot Extrusion

27
Q

EXAMPLE:
1. Large satellite dishes.
2. Gas cylinders and oxygen tanks.
3. Components for aerospace and
automotive industries (e.g.,
wheel rims).

A

Hot Spinning

28
Q

EXAMPLE:
1. Oil and gas pipelines.
2. Water supply systems.
3. Structural applications in
construction (e.g., support
columns).

A

Pipe Welding

29
Q

EXAMPLES:
1. Seamless pipes for chemical
plants and refineries.
2. Boiler tubes for high-pressure
steam systems.
3. Automotive drive shafts.

A

Hot Piercing (Seamless Tubing)

30
Q

Transforming flat sheets/plates into 3D parts (e.g., thick-walled cylindrical components).

A

Hot Drawing

31
Q

Joining pipes without fittings;
includes positions like 1G, 2G, 5G, and 6G.

A

Pipe Welding

32
Q

metal is forces through
a die to create continuous length of a
specific cross-sectional shape.

A

Hot Extrusion

WTAP (5 decks)

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