P - Abrasives to Tumblers

Question 1

Material removing technique that uses particles of very hard ceramic material called GRIT instead of metal blades. Wears down the surface of metal through high friction.

Answer 1

ABRASIVE CUTTING

Question 2

ABRASIVE CUTTING is also known as

Answer 2

GRINDING

Question 3

Typical ceramics used for abrasive cutting of metals

Answer 3

ZIRCONIA
ALUMINUM OXIDE
SILICONE CARBIDE
CERAMICA

Question 4

More expensive alternatives to ceramics used for abrasive cutting of metals

Answer 4

CBN (Cubic Boron Nitride)
DIAMOND

Question 5

Reasons to use ABRASIVE CUTTING over blades

Answer 5

Cutting hardened materials
Achieving tight tolerances
Creating superior surface finish

Question 6

Various shapes of abrasive grit

Answer 6

GRINDING WHEELS (flat circular disks)
GRINDING CUPS (bowls)
MOUNTED (on a metal shaft)
GRINDING STONES (rectangular forms)

Question 7

Grit particles fracture as they interact with the workpiece, resulting in the grinding wheel to get smaller in diameter.

Answer 7

ATTRITIOUS WEAR

Question 8

ATTRITIOUS WEAR leads the grinding wheels to effectively ____ _________

Answer 8

SELF SHARPENING

Question 9

TRUE OR FALSE:
Grinding MUST be performed on dedicated machine tools, and NEVER on LATHE or MILL

Answer 9

TRUE

Question 10

Describe “JOB ONE” when designing the layout of a machine shop

Answer 10

Place grinding machines as far away form other machine tools as possible

Question 11

Wheels that use a form of “Glass” as the bonding agent, FELDSPAR and CLAY, which are mixed with moisture and grit, then molded and pressed into a wheel shape.

Answer 11

VITRIFIED

Question 12

Wheels that use “Thermosetting Resin” as the bonding agent. Used in ANGLE GRINDERS.

Answer 12

RESINOID

Question 13

Bonding agent used in THIN CUT-OFF wheels

Answer 13

RUBBER

Question 14

Classifies grinding wheels under the ANSI standard B74. 13-1977. A different code is used for CBN(Cubic Boron Nitride) and Diamond.

Answer 14

WHEEL CLASSIFICATION CODE

Question 15

Interactions between a workpiece and a grit particle that do not result in chip production. Polishes a surface and improves its finish.

Answer 15

CUTTING
PLOUGHING
RUBBING

Question 16

Downside of interactions between a workpiece and a grit particle that do not result in chip production. Polishes a surface and improves its finish.

Answer 16

RESIDUAL STRESSES

Question 17

Slowly relaxes residual stresses using moderate temperature over a long period of time, to not negatively reduce the desired hardness.

Answer 17

POST HEAT TREATMENT

Question 18

Four categories of ABRASIVE CUTTING

Answer 18

GRINDING
FINISHING
POLISHING
BUFFING

Question 19

Simplest and most dangerous of all grinding machine tools

Answer 19

BENCH GRINDER

Question 20

Precision grinding machine dedicated to cutting flat surfaces

Answer 20

SURFACE GRINDER

Question 21

Grinding process where the workpiece is placed between two centers, live and dead, and rotated by a “Driving Plate and Dog” for a concentric shape

Answer 21

CYLINDRICAL GRINDING

Question 22

Grinding process second to CYLINDRICAL GRINDING or performed on its own. Workpiece rests on a blade and fed without slippage by an angled “Regulator Wheel”.

Answer 22

CENTERLESS GRINDING

Question 23

Rejuvenation process for grinding wheels

Answer 23

TRUING

Question 24

Device with a diamond tip which is drawn across the edge of the grinding wheel where it cuts it back to a straight surface concentric with the shaft.

Answer 24

DRESSING TOOL

Question 25

FINISHING applied to flat surfaces

Answer 25

LAPPING

Question 26

FINISHING applied to internal bores

Answer 26

HONING

Question 27

FINISHING applied to the outside surface of circular shafts. Uses a pre-cut, curve-faced "Stone"

Answer 27

SUPERFINISHING

Question 28

Flat slab made of bonded abrasive grit for LAPPING

Answer 28

LAPPING STONE

Question 29

Flat slab made of grooved metal for LAPPING

Answer 29

LAPPING PLATE

Question 30

Finishing process used on a bore with a cylindrical tool

Answer 30

HONING

Question 31

Tool which is cylindrical in shape and carries a ring of rectangular stones around the periphery.

Answer 31

HONING TOOL

Question 32

Finishing process performed using discs of material with very fine abrasive grit. Levels surfaces and removes pits, scales, and other imperfections.

Answer 32

POLISHING

Question 33

Process to achieve a "Bright Luster" look. Removes fine surface scratches left after polishing.

Answer 33

BUFFING

Question 34

Fluffy or edge-frayed to accept and retain the application of BUFFING COMPOUND

Answer 34

BUFFING WHEELS

Question 35

Fine abrasive grit distributed throughout a stick of wax-like material

Answer 35

BUFFING COMPOUND

Question 36

Abrasive grit can also be applied to a flexible surface to produce

Answer 36

COATED ABRASIVES

Question 37

Most common COATED ABRASIVES

Answer 37

SAND PAPER EMERY CLOTH

Question 38

Large numbers of machined components need their sharp edges slightly softened. They are placed in a rotating drum containing abrasive media.

Answer 38

DEBURRING

Question 39

A rotating drum containing abrasive media for DEBURRING

Answer 39

BARREL FINISHING

Question 40

A drum which vibrates the abrasive media for DEBURRING

Answer 40

VIBRATORY TUMBLER

Question 41

Specialist application for TUMBLERS

Answer 41

Polishing used brass firearm cartridges for reloading, where peanut or walnut husks rather than hard stones