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Blueprint Reading For The Machine Traits > Dictionary Of Terms > Flashcards

Dictionary Of Terms Flashcards

1
Q

Allowance

A

The minimum clearance or maximum interference between two material parts such as a shaft and a whole.

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2
Q

Abrasive

A

Material used to cut other materials softer than itself

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3
Q

Alloy

A

A mixture of two or more elements at least one of which is metallic melted to gather to form a new metal

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4
Q

Angular dimension

A

Dimension mention measured in degrees minutes and seconds

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5
Q

Anneal

A

The process of slowly cooling hot iron base metals to remove stresses and reduce the hardness

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6
Q

Arbor

A

A shift upon which is a cutting tool is mounted or spindle for holding the workpiece

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7
Q

Assembly drawing

A

A drawing that shows the relationship of the various components as they fit the gather

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8
Q

Axillary view

A

An orthographic view projected angularly used to show features appearing on inclined or oblique surfaces

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9
Q

Axis

A

A centerline about which parts are symmetrically arranged that may or may not revolve upon it.

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10
Q

Baseline Demensioning

A

A system of dimensioning used to locate features of a part from a common set of datums

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11
Q

Basic size

A

The exact theoretical size from which limits of size are derived by the application of allowances and tolerances

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12
Q

Bevel

A

A flat slanted surface between two other services at right angles to one another

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13
Q

Blind whole

A

A hole that does not pass all the way through

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14
Q

Bolt circle

A

A cylindrical centerline upon which two or more hole centers are located

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15
Q

Bore

A

A raised cylindrical projection used to provide extra metal around a hole in a casting or for going. The boss and the pad are similar except that the boss is always circular and the pad may be in any other shape

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16
Q

Brooch

A

To produce a design shape inside a cylindrical whole such as a keyway or hexagon. The broaching tool has a series of teeth gradually increasing in size that do The cutting as the tool is past or hold through the whole

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17
Q

Burnish

A

To finish or polished metal by rolling or slotting at school over the surface under pressure

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18
Q

Bushing

A

A replaceable insert to provide metal with better wearing qualities

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19
Q

Cad Drawing

A

A drawing created by computer aided drafting methods

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20
Q

Cam

A

A mechanical device used to change rotary motion to some other motion such as a reciprocating or sliding

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21
Q

Carburize

A

Heating low carbon steel to a temperature below it’s melting point in carbonaceous solid, liquid, or gas to raise the level of carbon in the exterior, then cooling slowly in preparation for heat treating abbreviated CARB

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22
Q

Case hardening

A

To harden ferrous alloy so that the surface layer is harder than the interior core

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23
Q

Casting

A

A metal object made by pouring molten metal into a mold

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24
Q

Chain dimensioning

A

Successive the mentioning that extend from one feature to another, rather than each originating at a datum. Tolerances accumulate with chain dimensions

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25
Q

Chamfer

A

A corner that has been removed from the end of the cylindrical surface, at an angle to the face. Used to facilitate assembly

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26
Q

Clearance Hole

A

A hole slightly larger than the bowl or fastener that is intended to pass through

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27
Q

Coaxiality

A

Coaxiality of cylindrical features exist when two or more cylindrical features have a common access

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28
Q

Collar

A

A projecting ring around the shaft

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29
Q

Concentricity

A

The condition where the median points of the features diametrically opposed elements are located within the cylindrical zone that is equally center about a datum axis

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30
Q

Core

A

A part of a mold that shapes the interior of a casting

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31
Q

Counterbore

A

To enlarge a whole cylindrically at the end. A drawing specification will include its diameter and depth

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32
Q

Countersink

A

To enlarge a whole conically at the end to except a flathead fastener. A drawing specification will include its diameter and include angles

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33
Q

Degree

A

A unit of angular measurement

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34
Q

Detailed drawing

A

A drawing of a single object, complete with dimensions and all other information necessary to produce the part

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35
Q

Die

A

A tool used to cut external threats. Also a tool used to shape mold stamp or cut metal

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36
Q

Die casting

A

A metal object produced by injecting molten material into metal dies under pressure

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37
Q

Draft

A

The angle provided on a pattern or mold that enables the pattern or molded part to be easily withdrawn from the mold

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38
Q

Eccentric

A

The term used off-center. Unlike concentric, eccentric diameters do not share a common access

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39
Q

Extrusion

A

A metal object made by forcing hot or cold material through dies of the desired shape

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40
Q

Face

A

To machine a flat surface perpendicular to the access, such as the end of the shift

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41
Q

Fastener

A

A connector used to secure two or more parts. Bolts knots screws and rivets are types of fasteners

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42
Q

Ferrous

A

Metals that contain iron as their base material such as steel

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43
Q

Fillet

A

A concave surface interior radius at the intersection of two services of an object

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44
Q

Fin

A

A thin projecting edge on cast or molded parts

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45
Q

Finish marks

A

Symbols appearing on the edge of view of surfaces to be machine. Usually can find two drawings of casting and forging

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46
Q

Fixture

A

A device designed to position and hold a part in the machine tool. It does not got the cutting tool

47
Q

Flame hardening

A

A process of hardening steel by heating with a oxyacetylene torch and quenching

48
Q

Flange

A

Hey projecting rim or collar on an object. It may include mounting holes to secure it in place

49
Q

Forge

A

To force HoTMetaL into a desired shape by hammering or squeezing

50
Q

Gage

A

In measuring instruments such as a gage block or a height gage

51
Q

Gauge

A

The thickness of sheet metal for the diameter of a wire designated by a number rather than demension

52
Q

Geometric tolerancing

A

Tolerances on drawings with emphasis on the actual function or relationship of part features where interchangeability is critical

53
Q

Gusset

A

And angular piece of metal fastened in the angle of a metal frame to get strength or stiffness

54
Q

Hardness test

A

A test that measures the degree of hardness of metals

55
Q

Heat treatment

A

The application of heat to metals to produce desired properties

56
Q

Horizontal

A

Parallel to The horizon

57
Q

Hub

A

The central part of the wheel such as the part into which the spokes are inserted

58
Q

Inclined surface

A

A flat surface sleeping in One Direction. It will appear as an edge in one principal view, distorted in others

59
Q

Included angle

A

The angle formed between one side and another, always less than 180°

60
Q

Isometric drawing

A

A three-dimensional Victorio drawing that has its horizon service drawn on 30° access from horizontal

61
Q

Jig

A

A device designed to hold a part to be machined. It also positions and guides the cutting tool

62
Q

Key

A

A metal bar or wedge used to secure gears or pulleys to a chef and prevent the rotary motion between the two pieces

63
Q

Keyseat

A

An axially located groove in a shaft that positions the key

64
Q

Jetway

A

An Axially located groove in a hub depositions the key

65
Q

Lap

A

To produce a surface finish by use of a soft metal impregnated with a fine abrasive powder

66
Q

Least material condition

A

When I feature contains the minimum amount of material maximum hole diameter and minimum shaft diameter abbreviated LMC

67
Q

Limits

A

The maximum and minimal permissible dimensions. Arrive that by applying tolerances to basic to dimension

68
Q

Linear dimensions

A

A dimension measured in a straight line

69
Q

Maximum material condition

A

When he feature contains the maximum amount of material minimum hole diameter and maximum shaft diameter abbreviated MMC

70
Q

Neck

A

An external groove cut in a cylindrical piece at a change in diameter, usually wear another poor is to fit against a shoulder

71
Q

Nominal size

A

A term used for the purpose of general identification

72
Q

Nonferrous

A

Metals that do not contain iron, such as brass bronze and aluminum

73
Q

Normalizing

A

The process of heating steel, then cooling in still air to room temperature to restore my uniform green structure and relieve internal stresses

74
Q

Oblique surface

A

The flat surface slanting into directions. It will appear distorted in all principal views

75
Q

Orthographic projection

A

The process of projecting the essential views of a three-dimensional object onto a flat plane, such as a piece of paper. This process is used for the mechanics blueprint

76
Q

Pad

A

A raised projection on a casting. Used to provide extra metal around a series of holes or a slotted hole

77
Q

Parallel

A

Extending in the same direction, such as two lines, everywhere equidistant, and not meeting

78
Q

Pattern

A

A model, made of wood, metal, or other material, used to form a cavity in the sand for pouring casting

79
Q

Perpendicular

A

Being at a right angle 90° to the given line or plane

80
Q

Pickle

A

To remove stains or oxide scale from parts by immersion in an acid solution

81
Q

Pinion

A

The smaller of two mating gears

82
Q

Pinch

A

The distance from a point on the thread to a corresponding point on the next adjacent thread measured parallel to the axis

83
Q

Profile view

A

The view that most clearly illustrates the shape of a feature is considered the profile view of that feature. With the whole it would be the view showing that it is round

84
Q

Quenching

A

Cooling metals rapidly by immersing them in order, oil, brine or air

85
Q

Radius

A

The distance from the center of a circle or an ark to it circumference. Equal to one half diameter. The plural of radius is radii

86
Q

Ream

A

A machine operation consisting of enlarging a whole slightly with a rotating fluted tool to provide greater accuracy, and better finish

87
Q

Reciprocation

A

A straight line, back-and-forth motion. To move in alternate directions

88
Q

Reference dimension

A

Used only for informational purposes. Does not receive the standard print tolerances and should not be used for production or inspection

89
Q

Regardless of featured size

A

The condition work tolerances of position or form must be met irrespective of where the feature lines within its size tolerance. Abbreviated RFS

90
Q

Relief

A

The amount one playing surface of a piece set below another plane, usually for clearance

91
Q

RIB

A

A relatively thin, flat membrane acting as a brace for support

92
Q

Round

A

A convex surface exterior radius at the intersection of two surfaces of a casting or forging

93
Q

Scale

A

Refers to the relative size of the drawing and the size of the part. The first number represents the size of the drawing and the second number the size of the port. Dimensions always represent the size of the part, not the print

94
Q

Section

A

An interior view of an object, drawn to expose features not otherwise visible

95
Q

Serrated

A

A surface or edge having nachos or sharp teeth is said to be serrated

96
Q

Shim

A

A thin piece of metal or other material place between two parts to adjust the fit

97
Q

Shoulder

A

Hey playing surface on a shift, normal to the axis and formed by a difference in diameter

98
Q

Spline

A

A raised area want to share external or hub internal parallel to the axis, and designed to fit into a recessed area of a mating part

99
Q

Spotface

A

To machine a round spot on a rough surface, usually around a whole, to get a good seat to a knot or bulkhead. Abbreviated SF or SFACE

100
Q

Springs

A

Basically springs for into two categories; helical or flat. The three most common helical springs are as follows:
Compression; tends to supply force when compressed, either in a hole or around a rod

Extension; tends to supply force when it is external pulled from end to end. Contains hooks on each and for connections

Torsion; designed to resist twisting or rotary motion. Contains hooks or projections for connections

101
Q

Symmetrical

A

The same on each side. Equal hairs. A central line usually indicates symmetry

102
Q

Tabular Dimensioning

A

A type of dimensioning where letters are substituted for dimensions that are listed in the table on the drawing. This permits more than one part to appear on the same drawing

103
Q

Tangent

A

A line drawn to the surface of an arc or circle so that it contact the arc or circle at only one point

104
Q

Tap

A

A tool for cutting threads in a hole drilled to a particular size for the threading operation

105
Q

Taper

A

Conical shape the permits a shaft or a hole to become gradually smaller at one end

106
Q

Temper

A

To change the physical characteristics of hardened steel by reheating to an intermediate temperature range for the purpose of roughening the steel. Also has a softening effect

107
Q

Template

A

I thin sheet used as a guide for the form and shape of the piece to be made

108
Q

Tolerance

A

Permissible variations from a given dimension

109
Q

Total tolerance

A

Total amount of variation allowed for a specified dimension

110
Q

Typical

A

A term used with drawing dimensions to indicate that all similar undimensioned featured are intended to have the same dimensions as the one marked TYP

111
Q

Undercut

A

A groove cut on the inside of another cut a hole for example

112
Q

Upset

A

To strike a piece of metal until becomes greater and it’s cross-section. To hammer metal into a different shape

113
Q

Vertical

A

Perpendicular to horizon, or 90° from the horizontal plane

114
Q

Woodruff Key

A

A flat key, semi circle in shape. The two basic dimensions diameter and with our coded into the key number. The last two digits designate the diameter and 1/8 of an inch. The proceeding digits designate the width in 1/32 of an inch

Blueprint Reading For The Machine Traits (1 decks)

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