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Marco > lathe > Flashcards

lathe Flashcards

1
Q

When a file is used

A

always left hand on handle and right hand in the end

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2
Q

To size a lathe

A

Swing over the ways and distance between centers .

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3
Q

weight of a lathe

A

the rigidity of the be bed

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4
Q

bed

A

cast iron peace that supports the lathe and able to handle vibration and deflection

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5
Q

Ways

A

machined top of the bed ad are hardened to resist ware one set for tail stock and one for the carriage .

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6
Q

Head stock

A

On the left of the lathe and houses the headstock spindle .

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7
Q

Headstock spindle

A

The headstock spindle is a hollow shaft supported by bearings . the works hold a live center ,chuck or faceplate

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8
Q

Back gears

A

link the spindle to the input shaft of the quick change gearbox

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9
Q

backlash

A

the amount of slack or space between mounting gears

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10
Q

Quick change gearbox

A

allows you to change gears quick and easily by shifting levers

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11
Q

pinion

A

engages the rack

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12
Q

rack

A

found under the front ways and move the carriage .

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13
Q

feed rod

A

move the carriage slower for turning

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14
Q

lead screw

A

move the carriage for threading

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15
Q

carriage

A

rides directly on the ways and is made up of the saddle , cross-slide , compound rest and apron .

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16
Q

saddle

A

H shaped casting rides directly on the ways

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17
Q

cross-slide

A

sits on top of the saddle and moves at right angles of the axis for the workpiece

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18
Q

compound rest

A

sit on top of the cross-slide . small sliding mechanism that adjust short distances and can swivel 360 deg . no power feed and tool post mounts on top

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19
Q

Apron

A

Hangs in front of the saddle .houses the drive gears and the split nut lever

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20
Q

Split nut lever

A

closes the split nut on the lead screw when thread is cutting

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21
Q

automatic feed lever

A

engage power feed to the carriage or cross slide

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22
Q

feed change lever

A

select between carriage or cross slide for power when automatic feed lever is engaged

23
Q

tailstock

A

consist of two part casting that sits on the ways and is clamped in place with the tailstock clamp

23
Q

Tailstock spindle

A

can move in and out by turning the tailstock handwheel Spindle bore is Morse taper to accommodate dead center . drill chuck and other cutting and clamp in place with the spindle clamp

24
Q

Lathe dogs

A

use to transmit power from the spindle to the workpiece when held between centers. Great care should be taken when used protruding parts can catch loose clothing and severely injure the operator .

25
Q

Tool holding system must meet the following

A

1 tool must be held rigidly
2 the height of the cutting tool must be adjustable
3 tool setting must be repeatable .

26
Q

steady rest

A

To support a piece other on the end or the middle . Adjustment screws 120 deg apart. Three of them

27
Q

follower rest

A

keeps a work piece from deflecting away from the cutting tool Only two rests

28
Q

Taper Attachment

A

allows the lathe to cut a taper by causing the carriage and cross slide to move at the same time

29
Q

Tool post grinder

A

is a wheel and motor that attach to the compound rest . The abrasive grit damage the ways if not protected with a board .

30
Q

Knurling tool

A

does not cut metal but displaces it
Flush area with coolant to wash away any fine shavings.
Low spindle speed high feed rate

31
Q

Tapers head stock spindle

A

Morse taper holder

32
Q

tail stock spindle taper

A

Morse taper 5/8th

33
Q

Milling machine taper

A

3 1/2 inch per foot

34
Q

Jacobs taper

A

ranges from 0.591 to 0.979 taper per inch

35
Q

forming tools

A

use to do special shapes .O ring grooves and threading and chamfering.

36
Q

Cemented carbide

A

pieces of carbide soldered onto a steel shank

37
Q

sharpening HSS tool

A

Use aluminum oxide Gray wheel
Remember to quench often not to over heat the steel

38
Q

Sharpening cemented carbide

A

Use aluminum oxide to grind away supporting steel and use silicon carbide to sharpen carbide

39
Q

carriage oil pump

A

Lubricates the carriage ways

40
Q

why not use compressed air

A

can potentially force chips into areas that can not be cleaned

41
Q

Spindle speed

A

Spindle speed is set to the correct cutting speed

42
Q

Cutting speed

A

the speed the the workpiece moves past the cutting tool measured in rpm

43
Q

Feed rate

A

the rate at which the tool is fed into the workpiece
measured in inch or millimeter per revolution

44
Q

Direct reading dial

A

the cut is the same as the dial indicated

45
Q

indirect reading dial

A

the cut is twice the increment shown

46
Q

parting

A

must be done as close to the chuck as possible
Set the tool with as little as possible over hang

47
Q

boring

A

a hole must be drilled fist to accommodate the boring bar

48
Q

reaming

A

spindle half the speed of drilling but twice the feed of drilling

49
Q

Thread chasing dial

A

tells you when to close thre split nut

50
Q

Split nut

A

closes the lead screw to cut threads according to the tread chart.

51
Q

cutting fluids

A

oils and emulsions (oil and water ) is the most common.

52
Q

three types of cutting fluids

A

1) cutting oils
2)emulsifiable oils
3) chemical cutting fluids

53
Q

Characteristics of cutting oils

A

must cool, lubricate , resist rust and corrosion , remain stable . resist rancidity . non toxic transparent, low viscosity and non flammable .

Marco (5 decks)

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