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Aircraft Material > Metal Working Process > Flashcards

Metal Working Process Flashcards

1
Q

are those formed by physically working the
metal into shape

A

Wrought objects

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2
Q

are formed by pouring molten metal into
molds.

A

cast items

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3
Q

When it comes to mechanically working
metal into a desired shape, there are three
methods commonly used.

A

They are hot-working, cold-working, and extruding

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4
Q

the process of forming metal at an elevated temperature when it is in its annealed, or soft condition

A

Hot-working Process

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5
Q

consists of forming hot metal ingots with rollers to form sheets, bars, and beams

A

Rolling

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6
Q

is a process wherein a piece of metal is worked
at temperatures above its critical range.

A

Forging

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7
Q

is a process of reduction of the
cross-sectional area or shaping a metal
piece through the deformation caused by a
pair of rotating in opposite directions metal
rolls.

A

Rolling

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8
Q

– 6x6 .in or larger; approximately square

A

Bloom

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9
Q

– less than 6x6 in; approximately square

A

Billet

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10
Q

– rectangular sections in which the width is greater than twice the thickness

A

Slabs

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11
Q

is forming a preheated workpiece by
using impact energy of the falling
hammer forcing the metal to fill
the space between the punch (a part
attached to the hammer) and
the forging die (a part attached to the
anvil).

A

Hammer forging (drop forging)

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12
Q

The surplus metal which has been
squeezed out into the relieved section
is called _________.

A

the fin or flash

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13
Q

is used to form large and heavy parts. Since a press is slow acting, its force is uniformly
transmitted to the center of the material being pressed.

A

Pressing

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14
Q

is a hammering process whereby a hot ingot is placed between a pair of formed dies
in a machine called a drop hammer and a weight of several tonsis dropped on the upper die

A

Drop forging

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15
Q

is a type of forging that is usually used on small parts because it requires a metalworker to physically hammer a piece of metal into its finished shape.

A

Hammering (smith forging)

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16
Q

is a forging operation which is employed for manufacturing head of bolts, valves,
artillery shells and other parts where increase of cross section dimensions of the workpiece is
desired.

A

Upset forging

17
Q

is a forging operation involving reduction of the workpiece diameter (with increase of its length) by rolling it between two grooved rolls rotating at the same rotating direction.

A

Roll forging (Swaging)

18
Q

performed well below a metal’s critical temperature and ranges from the manual bending of sheet metal for skin repairs to drawing seamless tubing and wire.

A

Cold-working

19
Q

usually refers to the rolling of metal at room temperature to its approximate size. Once this is done, the metal is pickled to remove any scale, and then passed through chilled finishing rolls.

A

Cold-rolling

20
Q

is used in making seamless
tubing, wire, streamlined tie rods, and other
forms of stock

A

Cold-drawing

21
Q

the process of forcing
metal through a die which imparts
a required cross-section to the
metal.

A

Extrusion

22
Q

The principal advantage of
the extrusion process is its ________

A

flexibility

23
Q

are being more generally used in aircraft construction as a result of improved quality and the development of high-strength heat treatment.

A

Casting

24
Q

– consists of the manufacture of pattern, pouring the metal into the mold, and the removal and finishing of the casting after it has solidified in the mold.

A

Static Casting

25
Q

– devised as a method for applying pressure to the molten metal during the casting operation. Pressure is obtained by whirling the mold.

A

Centrifugal Casting

26
Q

– only an external mold is used and is spun around its own axis

A

True centrifugal

27
Q

– an inside core is used as well as external mold

A

Semi-centrifugal

28
Q

– work is rotated around an independent central axis about which the molds are grouped radially.

A

Centrifuge

29
Q

– “lost wax” process of casting is used for intricate parts that must be held to high accuracy in size and shape at a reasonable cost

A

Precision Casting

30
Q

is composed of two or more metal elements mixed together

A

An alloy

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