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Man Poo > P - Abrasives to Tumblers > Flashcards

P - Abrasives to Tumblers Flashcards

1
Q

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.

A

ABRASIVE CUTTING

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2
Q

ABRASIVE CUTTING is also known as

A

GRINDING

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3
Q

Typical ceramics used for abrasive cutting of metals

A

ZIRCONIA
ALUMINUM OXIDE
SILICONE CARBIDE
CERAMICA

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4
Q

More expensive alternatives to ceramics used for abrasive cutting of metals

A

CBN (Cubic Boron Nitride)
DIAMOND

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5
Q

Reasons to use ABRASIVE CUTTING over blades

A

Cutting hardened materials
Achieving tight tolerances
Creating superior surface finish

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6
Q

Various shapes of abrasive grit

A

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

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7
Q

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

A

ATTRITIOUS WEAR

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8
Q

ATTRITIOUS WEAR leads the grinding wheels to effectively ____ _________

A

SELF SHARPENING

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9
Q

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

A

TRUE

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10
Q

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

A

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

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11
Q

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.

A

VITRIFIED

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12
Q

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

A

RESINOID

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13
Q

Bonding agent used in THIN CUT-OFF wheels

A

RUBBER

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14
Q

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

A

WHEEL CLASSIFICATION CODE

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15
Q

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

A

CUTTING
PLOUGHING
RUBBING

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16
Q

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

A

RESIDUAL STRESSES

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17
Q

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

A

POST HEAT TREATMENT

18
Q

Four categories of ABRASIVE CUTTING

A

GRINDING
FINISHING
POLISHING
BUFFING

19
Q

Simplest and most dangerous of all grinding machine tools

A

BENCH GRINDER

20
Q

Precision grinding machine dedicated to cutting flat surfaces

A

SURFACE GRINDER

21
Q

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

A

CYLINDRICAL GRINDING

22
Q

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”.

A

CENTERLESS GRINDING

23
Q

Rejuvenation process for grinding wheels

A

TRUING

24
Q

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.

A

DRESSING TOOL

25
Q

FINISHING applied to flat surfaces

A

LAPPING

26
Q

FINISHING applied to internal bores

A

HONING

27
Q

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

A

SUPERFINISHING

28
Q

Flat slab made of bonded abrasive grit for LAPPING

A

LAPPING STONE

29
Q

Flat slab made of grooved metal for LAPPING

A

LAPPING PLATE

30
Q

Finishing process used on a bore with a cylindrical tool

A

HONING

31
Q

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

A

HONING TOOL

32
Q

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

A

POLISHING

33
Q

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

A

BUFFING

34
Q

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

A

BUFFING WHEELS

35
Q

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

A

BUFFING COMPOUND

36
Q

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

A

COATED ABRASIVES

37
Q

Most common COATED ABRASIVES

A

SAND PAPER
EMERY CLOTH

38
Q

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

A

DEBURRING

39
Q

A rotating drum containing abrasive media for DEBURRING

A

BARREL FINISHING

40
Q

A drum which vibrates the abrasive media for DEBURRING

A

VIBRATORY TUMBLER

41
Q

Specialist application for TUMBLERS

A

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

Man Poo (31 decks)

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