D- Spin Casting and Orbital Forging

Question 1

What is a method used to make hollow castings without the need for a core?

Answer 1

CENTRIFUGAL/ SPIN CASTING

Question 2

What is a dynamic casting process where one part of the die moves into another after the pour?

Answer 2

SQUEEZE CASTING

Question 3

What is the process of a smooth metal mold being filled with molten metal. The metal solidifies first where it is in contact with the metal surface. The mold can be inverted to allow the central part of the melt to flow out.?

Answer 3

SLUSH CASTING

Question 4

What is an ancient process that uses hammering (or pressing) to shape hot pliable metals.?

Answer 4

FORGING

Question 5

All metal is initially purified and reduced to a molten state from ore, after which it is poured into a mold to become an

Answer 5

INGOT

Question 6

What happens when a metal in an amorphous liquid state solidifies to a solid form?

Answer 6

It goes through a CRYSTALLIZATION PROCESS.

Question 7

What are individual patches of crystallization?

Answer 7

GRAINS

Question 8

What are lattice crosslinking that start from a large number of initiation sites within the liquid metal?

Answer 8

CRYSTALS

Question 9

What is the structure created by forging at elevated temperatures creating microcracking called?

Answer 9

WROUGHT STRUCTURE

Question 10

What is a concave-shaped process performed to move metal generally to more advantageous locations in preparation for use in a later process?

Answer 10

EDGING

Question 11

What is a convex-shaped process performed to move metal generally to more advantageous locations in preparation for use in a later process?

Answer 11

FULLERING

Question 12

What factors affect strength in forging?

Answer 12

WROUGHT STRUCTURE and GRAIN FLOW DIRECTION

Question 13

How should GRAIN FLOW always flow?

Answer 13

Parallel to the boundaries of the part

Question 14

What is the process where a hot pliable metal is forced to flow around inside a closed die cavity, where the grains are constrained to flow parallel with the boundaries?

Answer 14

CLOSED DIE FORGING

Question 15

What are the two forms of FORGING machines?

Answer 15

PRESSES and HAMMERS.

Question 16

What is the forging process where the dies are dovetailed into the base and of the machine, making die removal and replacement easy.

Answer 16

IMPRESSION DIE FORGING

Question 17

What is the solution to the issue with IMPRESSION DIE FORGING?

Answer 17

Include a FLASH LAND and GUTTER which acts as an overflow system

Question 18

What process creates surface designs (usually different) in relief (raised) on both sides.?

Answer 18

COINING

Question 19

What process creates the same design on both sides, one in relief (raised) and the other in intaglio (indented)?

Answer 19

EMBOSSING

Question 20

What process is a superior and more expensive method of heading which combines radial and circular motions of the upper punch, and results in a swirling grain flow that is always parallel to the boundaries?

Answer 20

ORBITAL FORGING

Question 21

What is a process used to form the bolt head by deforming material radially outward?

Answer 21

HEADING