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Metal Production > First Midterm > Flashcards

First Midterm Flashcards

0
Q

Dial calipers subdivisions

A

100ths on main scale and .001 on dial gauge

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1
Q

3 uses of a dial caliper

A

Linear measurements
Outside and inside diameters
Depth

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2
Q

Charc of Micrometer

A

Thimble has 25 subdivisions and the least count is .0001

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3
Q

Least count

A

Smallest measurements that your tool will measure to

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4
Q

Roughness average

A

Pertains to surface finish

Higher the number the rougher the finish

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5
Q

Feeler gauges

A

Used to set reference planes

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6
Q

Screw ring gauge

A

Used to gauge thread

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7
Q

.50-13 UNC-2A

A 
A- external thread
B-internal thread
1-loose threads
2-middle class
3- tightest threads
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8
Q

Thread plug gauge

A

Only for internal threads

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9
Q

Ring gauge

A

Used for shaft or post(go/no-go)

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10
Q

Profilometer

A

Gauges surface roughness

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11
Q

Gauge blocks

A

Standard measurements to set a micrometer

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12
Q

Surface plates

A

Datum to measure from

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13
Q

Telescoping gauges

A

Spring loaded and used for holes

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14
Q

Spring caliper

A

Rough measurement of diameter

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15
Q

CMM

A

Uses coordinates to measure 3-d of any part

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16
Q

Engine lathe

A

Not a production lathe. Primarily for single piece or short runs

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17
Q

Turret lathe

A

Used for duplicate parts

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18
Q

Lathe size

A

By largest working diameter and max distance btw centers

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19
Q

Headstock of lathe

A

Clamped on left hand end of bed

Provides drive of workpiece

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20
Q

Carriage of lathe

A 
Used move cutting tool along lathe bed
Consists of 
Saddle-mounts cross-slide and apron
Cross-slide 
Apron
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21
Q

Cross-slide

A

Provide movement of cutting tool

Compound slide is also attached

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22
Q

Apron

A

Moves carriage along lathe bed

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23
Q

Tail stock

A

Provide support for right hand end of workpiece

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24
Q

Shear pins and slip clutches

A

Prevents damage to feed mechanism from overload or sudden torque

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25
Q

Cutting conditions for turning

A

Cutting speed (v). Feed (f). Depth (d)

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26
Q

Spindle speed

A

Rpm = (CS x 4)/ d

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27
Q

Feed rate for turning

A

Rough feed - .0115(in/rev)

Finishing feed - .002- .004 (in/rev)

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28
Q

Key machining operation

A

Turning. Drilling. Milling

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29
Q

Milling

A

Rotating multiple cutting edge tool is moved across work to cut a plane

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30
Q

Three basic types of chips

A

Continuous chips
Continuous chips with built up edge (BUE)
Discontinuous chip

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31
Q

Continuous chip

A

Ductile work material
High cutting speed
Small feed and depth

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32
Q

Continuous with BUE

A

Low to med speed

Tool chip friction causes chips to break off and adhere to rake face

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33
Q

Single point cutting tool

A

Point usually rounded form nose radius

Turning uses this

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34
Q

Multi point cutting tool

A

Motion relative to work achieved by rotating
Drilling and milling use this
Feed rate is measured by workpiece fed into cutting tool

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35
Q

Back rake angle

A

Allows chips to flow

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36
Q

Positive rake angle

A

Better surface finish

When side rake angle is below cutting edge

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37
Q

Negative rake angle

A

Side rake angle is above cutting edge used for roughing and harder materials

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38
Q

Ductile

A

Stretches without breaking

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39
Q

Malibility

A

Compression

Better compression equals higher precision

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40
Q

Material properties of cutting tools

A

Cutting and forming

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41
Q

Principle materials of cutting tools

A

Non metallic
Ferrous
Non ferrous

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42
Q

Basic property for every cutting tool

A

Wear resistance

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43
Q

Cubic boron nitride

A

Next to diamond in hardness

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44
Q

Band saw advantages

A

Fast
Large work pieces
Most narrow kerf

45
Q

Band saw disadvantages

A

High tool cost
Not accurate
Poor finish

46
Q

Band saw applications

A

Any soft metal

Any shape

47
Q

The set of band saw blade

A

How far each tooth is bent

48
Q

Cold saw disadvantages

A

High machine cost
Limited workpiece size
Large kerf loss

49
Q

Cold saw advantages

A

Very accurate
Good surface finish
High productivity
Long tool life

50
Q

Cold saw applications

A

Structural shapes

Thin walled sections

51
Q

Abrasive saw advantages

A

Cuts metal of any hardness

Good surface finish

52
Q

Abrasive saw disadvantages

A

Short tool life

Limited workpiece size

53
Q

Abrasive saw applications

A

Hardened steel

Ceramics

54
Q

Orientation for cross sectional cuts

A

Orient for the most tooth engagement

55
Q

End milling

A

Has teeth on end and sides used cut slots

Most versatile and Flexable cutter

56
Q

Ball mill

A

Used cut trough

57
Q

Horizontal milling cuts

A

Slotting. Slitting. Form milling. Straddle milling. Slab milling.

58
Q

Up milling

A

Conventional milling. Gives a rougher finish

59
Q

Down milling

A

Mostly used in production. Better finish

60
Q

Characteristics of abrasives

A

Hardness
Abrasion resistance
Compressive strength
Thermal conductivity

61
Q

Type 1 surface grinder

A

Horizontal spindle with reciprocating table

62
Q

Type 2 surface grinder

A

Horizontal spindle with rotary table

63
Q

Type 3 surface grinder

A

Vertical spindle with rotary table

64
Q

Type 4 surface grinder

A

Vertical spindle with reciprocating table

65
Q

Dielectric fluid

A

Flushing to remove chips. Oxygen shield. Serves as coolant

66
Q

Edm parameters

A

Amperage. Frequency. Flushing. And arc gap

67
Q

Effect of changing amperage

A

Increase amps gives smother finish

68
Q

Adv of EDM

A

Cuts any hardness. Leaves no buts. No cutting forces. Capable of complex geometry

69
Q

Absolute tool positioning vs incremental

A

Absolute is based off of the origin while incremental is based off of the last cut

70
Q

Programming character

A

Alpha numeric character

71
Q

Address.

A

Letter that describes meaning of numeric value following the address

72
Q

Words

A

An address followed by a number

73
Q

Blocks

A

One complete line of info

74
Q

S-code

A

Spindle speed

75
Q

F- code

A

Sets tool feed rate

76
Q

M-codes

A

Machine function

77
Q

G-codes

A

Preparatory functions

78
Q

N or sequence number

A

Serves as a tag for each block

79
Q

G00

A

Rapid travel

80
Q

G01

A

Linear interpolation

81
Q

G02

A

Circular interpolation clockwise

82
Q

G03

A

Circular interpolation counter clockwise

83
Q

G20

A

Inch mode

84
Q

G80

A

Cancel canned cycle

85
Q

G90

A

Absolute mode

86
Q

G91

A

Incremental mode

87
Q

M02

A

Program end

88
Q

M03

A

Spindle on CW

89
Q

M04

A

Spindle on CCW

90
Q

M05

A

Spindle stops

91
Q

M06

A

Tool change

92
Q

M08

A

Coolant on

93
Q

M09

A

Coolant off

94
Q

Cut per tooth = chip load

A

.005 equal roughing

.001 equals finishing

95
Q

Feed rate of milling

A

Inches per min

96
Q

Cutter and shank sizing

A

1/8 x 3/8.
First one is cutter and last one is shank
1/2 x 5/8 x 3/8
Sizes on end is the cutter size and the middle is the shank

97
Q

Program zero or part zero is same as

A

Work zero

98
Q

In cnc program this type of code stays active for entire program unless canceled

A

Modal

99
Q

In cnc program each block is read and executed by controller in block number

A

False

100
Q

The following properties are desired for abrasive wheel

A

High hardness and low compressive strength

101
Q

Conventional milling work piece is fed in blank direction of cutting tool

A

Opposite

102
Q

Down milling requires . Blank. Force than up milling

A

Less

103
Q

Drill the portion of body between margin and flute helps with. Blank.

A

Reducing friction

104
Q

Silicon carbide wheels are used less as grinding wheel due to their

A

Low compressive strength

105
Q

Work piece fed between two grinders

A

Center less grinding

106
Q

To machine less ductile materials like cast iron generally cutting tool with positive rake angle is chosen. T or F

A

False

107
Q

Calculate drilling speed you take. Blank. Of 4CS/ D

A

Half

108
Q

Carbide inserts have low hardness compared to HSS cuting tools. T or F

A

False

109
Q

Three jake chucks are. Blank. Accurate than collets

A

Less

110
Q

Common type of tool wear that affects tool geometry is

A

Crater and flank wear

Metal Production (1 decks)

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