H- PM and SPINNING

Question 1

A sheet metal process used to create circular axisymmetric shapes

Answer 1

SPINNING

Question 2

Mold with the shape of the internal dimensions and configuration of the desired final part

Answer 2

MADREL

Question 3

Rotates the MANDREL at the necessary speed

Answer 3

SPINDLE

Question 4

Clamps the BLANK cut from the sheet metal against the end of the mandrel

Answer 4

TAIL STOCK

Question 5

Pushes the BLANK over the MANDREL to create the shape

Answer 5

ROLLER TOOL

Question 6

The BLANK remains of constant thickness

Answer 6

CONVENTIONAL SPINNING

Question 7

The BLANK is thinned and the diameter decreases

Answer 7

SHEAR SPINNING

Question 8

Metal with thickness of 1/4 in or more

Answer 8

PLATE

Question 9

Faster than SPINNING
Leave longitudinal marks

Answer 9

DEEP DRAWING and FORMING

Question 10

Technique that uses explosions to force metal into dies and molds

Answer 10

EXPLOSION FORMING

Question 11

EXPLOSION FORMING ADVANTAGES

Answer 11

Shockwaves
Deadens Sound
Cools
Suppresses Flash
Catches Debris

Question 12

Shaping of sheet metal using electromagnetic fields

Answer 12

MAGNETIC PULSE FORMING/ INDUCTIVE PULSE FORMING

Question 13

Cup which metal is poured through to steady the stream and prevent splashing

Answer 13

TUNDISH

Question 14

Powdered metal is placed in a DIE CAVITY with the cross section of the desired part, and it is punched by a PRESS

Answer 14

COMPACTION

Question 15

Powdered metal has been fully PRESSED and highly porous. Intense stress is generated at small points of contact causing limited fusion between particles.
GREEN MEANS INCOMPLETE

Answer 15

GREEN COMPACT (GREEN STATE)

Question 16

Powdered metal is placed in a flexible rubber bag and then sealed inside a chamber. Pressurized fluid applied in all directions uniformly densifies the bag.

Answer 16

ISOSTATIC COMPACTION (to make stock material for PM)

Question 17

Added to metals like Tungsten Carbide to help it stay in a GREEN COMPACT STATE

Answer 17

POLYMER BINDER

Question 18

GREEN COMPACT is placed in a SINTERING OVEN to reduce the porosity

Answer 18

SINTERING

Question 19

Steps of SINTERING

Answer 19

PREHEAT ZONE
HOT ZONE (MAX TEMP -> 1/2 Melting Point)
COOLING ZONE

Question 20

Pores are filled with fluid after air is drawn out in a vacuum chamber (OIL IMPREGNATED BEARINGS) (Surface tension prevents oil from coming out)

Answer 20

IMPREGNATION

Question 21

MEDICAL IMPLANTS

Answer 21

TITANIUM

Question 22

Which metals cannot be used for this technique?

Answer 22

TUNGSTEN (high melting point)
TITANIUM (reactive when molten)

Question 23

Types of MAGNETIC PULSE FORMING

Answer 23

MAGNETIC PULSE BULDGING
MANGETIC PULSE CRIMPING
MAGNETIC PULSE FORMING