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159 Cards in this Set
- Front
- Back
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Abrasive Water Jet Machining (AWJM) |
Similar to WMJ except that an abrasive is added to the water jet after it exits the nozzle. |
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Absolute System |
A type of numerical control system in which all coordinates are located from a fixed or absolute zero point. |
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Abstract |
Part of the written report to the client, this includes one or two sentences about the content of the report to capture a potential readers interest. |
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Acme |
Screw thread form |
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Active Coils
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The total coils minus the two ends in a compression spring.
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Actual Size
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Actual measured size of a feature.
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Acute Angle
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An angle less than 90 degrees
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Addendum |
The radial distance from the pitch diameter to the top of the tooth. It is equal to 1/P |
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Adjacent Alignment Chart
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Two related variables plotted along the same line, but on opposite sides. |
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Adjustable Curve |
This instrument has a locking bow and is used to draw any radius from 6.75 inches to 200. It takes over where the ordinary compass leaves off and eliminates the beam compass. |
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Aligning of Features
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This occurs to correct the true projection concept. It is when the top hole is theoretically revolved to the cutting-plane line and projected to the sectional view. |
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Alignment Chart
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A graphical representation of the relationship of two or more variables. |
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Allen Screw
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Special set screws or cap screws with hexagon socket in head. |
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Allowance
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Minimum clearance between mating parts. Specifically, the amount of room between two main parts, usually considered the tightest possible fit.
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Alloy
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Two or more metals in combination, usually a fine metal with a baser metal.
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Alloy Steel
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This is any steel that contains one or more alloying elements added to produce characteristics not available in unalloyed carbon steels.
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Alphanumeric
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Refers to the totality of characters that are either alphabetic of numeric.
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Alternate Section Lining
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Combination of true projection and correct projection. |
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Alternatives
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Convincing the client that a thorough investigation was done by the design group by including a brief summary of the alternatives that were considered but discarded and why.
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Altitude (of a prism) |
The perpendicular distance between its end polygons (or bases) |
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Aluminum |
A bright silvery metal that is very light. In addition to being light, it is an excellent conductor and able to resist corrosion. It is usually alloyed with copper to increase hardness and strength. |
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Ammonia |
A colorless gas used in the development process of diazo and sepia prints. |
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Analysis |
Summarizing the major assumptions and calculations. Also, the study and evaluation of an objects characteristics. |
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Angle Gear |
Similar to a bevel gear except that the angles are at other than 90 degrees to each other. |
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Angle Iron |
A structural shape whose section is a right angle. |
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Angle of Thread |
The included angle between between the sides of a thread. |
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Angle Plate Jig |
A modified form of a plate Jig in which the surface to be machined is perpendicular to the locating surface. |
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Angularity |
A feature control in which a given surface axis or center plane must form a specified angle other than 90 degrees with a datum. |
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Annealing |
The process of heating a part, soaking it until it is thoroughly, and cooling it by turning off the furnace. |
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Anodizing |
The process of protecting aluminum by oxidizing in an acid bath using a direct current. |
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Application |
A definable set of drafting tasks to be accomplished in a given drafting area; may be accomplished partly through manual procedures and partly through computerized processes. |
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Application engineering |
This type of engineering takes previous designs into consideration when creating a new design. It is generally a team effort whose primary task is to modify and incorporate these existing concepts to meet the design requirements for the new system. |
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Applique |
A generic term used to describe a variety of shortcut products used in drafting. |
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Arbor Press |
A machine that performs internal broaching operations using a push-type, rather than a pull-type broach. |
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Arc |
A part of a circle. |
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Arc-weld |
To weld by electric arc; the work is usually the positive terminal. |
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Arrowhead |
The most commonly used termination symbol for dimension and leader lines. |
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Artificial Intelligence |
the ability of a machine to improve its own operation or the ability of a machine to perform function that are normally associated with human intelligence such as learning, adapting, reasoning, self-correction, and automatic improvement. |
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Assembled Isometric Assembly Drawings |
This style shows how a single product looks when assembled. |
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Assembly Drawing |
Illustrates how a product is assembled when completed. |
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Assembly Section |
This section occurs when a sectional drawing is made up of two or more parts. It shows how the various parts go together. |
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Attribute Listing |
A systematic guise for checking the completeness of technical detail drawings. It includes the questions: what is the function? what size is it? What materials are used? Can it be made-how and with what processes? What other factors need to be checked. |
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Attributes |
The characteristics of a part. |
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Automated Process Planning |
Using a computer in developing a process. |
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Automation |
The conversion of a process or system to automatic operation. |
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Auxiliary Section |
An view in section. |
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Auxiliary View |
An additional view of an object, usually of a surface inclined to the principal surfaces of the object to provide a true size and shape view. |
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Axes |
Plural of axis |
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Axis |
A longitudinal center line of the thread. Also, an imaginary line around which parts rotate or are regularly arranged. |
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Axonometric Projection |
Three-dimensional drawings |
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Axonometric Sketching |
This type of sketching may be one of three types-isometric, dimetric, or trimetric. All relate to proportional scales and angle positions of length, width, and depth. |
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Azimuth Bearing |
In this method, the total angles us used going clockwise from due north. |
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Babbitt |
A soft alloy for bearings, mostly of tin with small amounts of copper and antimony. |
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Back Weld |
A weld applied to the opposite side of a joint after the major weld has been applied. |
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Backlash |
Lost motion between moving parts, such as threaded shaft and nut or the teeth or meshing gears. |
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Balloon |
Number within a circle, used to identify parts. |
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Bar Chart |
Wither horizontal or vertical, these charts most often show relative amounts. They often show the relative timing of activities in the form or planning chart. Generated from a spread shot in a personal computer. |
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Base Circle |
Used to lay out an offset follower. It is circle with a radius equal to the distance from the center of the shaft to the center of the follower at its lowest position. |
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Baseline |
The bottom line of the displacement diagram. |
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Baseline Diagrams |
This type of connection diagram shows all wire paths running into a single baseline. They are easier to read and follow than point-to-point diagrams, but they can be misleading because they do not show the electronic components in their proper position. |
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Baseline Dimensioning |
A system of dimensioning where as many features of a part as are functionally practical are located from a common set of datums. |
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Basic Dimension |
A theoretically "perfect" dimension similar to a reference or nominal dimension. It is used to identify the exact location, size, orientation, or shape of a feature. |
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Basic Size |
The size from which the limits of size are derived by the application of allowances and tolerances. |
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Batter |
The slope of the grade is used. For each unit of rise (R), there are four horizontal (H) units. |
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Beam Diagrams |
These are diagrams of beams of varying shapes, materials, and sizes. They consist mainly of free-body, shear, movement slope, and deflection diagrams. |
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Bearing |
A supporting member for a rotating shaft. also, the bearing of a line is the direction of that line as it is drawn in the top view of a drawing. |
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Bend Allowance |
The amount of sheet metal required to make a bend over a specific radius. |
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Bend Allowance Charts |
Two basic types of charts used to calculate bend allowances in both the English and metric systems. One is used for 90 degree bend, and the other is used for bends from 1 degree to 180 degrees. |
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Bending |
An operation in which a metal part is simply bent to a desired angle. |
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Between Symbol |
A symbolic means of indicating that the states tolerance applies to a specified segment of a surface between designated points. |
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Bevel |
An inclined edge; not a right angle to joining surface. |
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Bevel Gear |
Cone-shaped in form with straight teeth that are on an angle to the axis of the shaft. It is used to transmit power and motion between intersecting shafts that are at 90 degrees to each other. |
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Beveled Rings |
These have a 15 degree bevel on the groove-engaging edge. they are installed in grooves having a comparable bevel on the load-bearing wall.
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Bilateral Tolerance |
When this tolerance is applied to a dimension, the tolerance applies in both directions, but is not necessarily evenly distributed. |
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Bisect |
To divide into two equal parts. |
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Blanking |
An operation that produces a part cut completely by the punch and die. Also, a stamping operation in which a press uses a die to cut blanks from flat sheets or strips of metal. |
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Blind hole |
A hole that does not go completely through an object. |
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Block Diagrams |
The most widely used types of diagrams in electronics engineering charts, process flow charts, and functional block diagrams. |
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Blueprint |
A copy of a drawing. |
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Boardroom Sketching |
This technique works well with larger groups than the conversational style. since there are more people involves, a larger surface-for better viewing- is needed. It can be a chalkboard, but more likely will be an enamel, glass, or dry-erase surface. |
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Bolt |
A threaded fastener that passes directly through parts to hold them together, and uses a nut to tighten or hold the parts together. The tip of the nut is flat.
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Bolt Circle |
A circular center line on a drawing, containing the centers of holes about a common center. |
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Bore |
To enlarge a hole with a boring bar or tool in a lathe, drill press, or boring mill. |
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Boring Mill |
A machine tool normally used to machine large workpieces. |
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Boss |
A cylindrical projection on a casting or a forging. |
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Bow Compass |
One of two types of compasses. This type uses a spring and an adjusting screw to set the compass to the desired radius. |
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Bowed Ring |
They differ from conventional types in that they are bowed around an axis perpendicular to the diameter bisecting the gap. Their construction permits the rings to function as springs as well as fasteners. |
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Box Jig |
Designed to be used fro parts that require machining on several sides. |
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Brass |
An alloy of copper and zinc. |
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Brazing |
The process of joining metals together with a nonferrous filler rod. A temperature above 1000 degrees Fahrenheit, but just below the melting point, is used to join the parts. |
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Breakdown (Bender) |
It is the station 2 of the drop forging process- it forms the parts into special contours. |
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Broach |
A tool for removing metal by pulling or pushing it across the work; the most common use is producing irregular hole shapes such as squares, hexagons, ovals, or splines. |
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Broaching Machine |
Used to modify the shape of a workpiece by pulling tools called broaches across or through the part. |
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Broken-Out Section |
A portion removed from the drawing in order to make a particular feature easier to understand. |
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Bronze |
An alloy of eight or nine parts of copper and one part tin.
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Browser |
A client program that enables one to search through the information provided by a specific type of server. |
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Buff |
To finish or polish on a buffing wheel composed of fabric with abrasive powders. |
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Burnish |
To finish or polish by pressure upon a smoth roling or sliding tool.
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Burr |
The ragged edge or ridge left on metal after a cutting operation. |
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Bushing |
A metal lining that acts as a bearing between rotating parts such as a shaft and pulley; also used on jigs to guide cutting tools. |
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Butt Joint |
One of two kinds of basic rivet joints--the parts are butted and are held together by a cover plate or butt strap that is riveted to both parts. |
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Cabinet Drawing |
Have the same range of receding axes as cavalier drawings, but the distances are drawn to half size. |
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CAD (Computer Aided Drafting) |
The use do computers and peripheral devices to aid in the documentation of design projects. |
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CAD system |
The hardware, software, and user in computer-aided-drafting. It is usually referred to as a configuration of computer hardware. this is a misuse of the term. CAD hardware is just one of the previously mentioned three components needed to have a CAD system.
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CAE (Computer-Aided Engineering) |
Any use of a computer to assist in engineering tasks, analysis testing, calculating, design review, and experimentation. |
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Calipers |
An instrument used for measuring diameters. |
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Callout |
A note on the drawing giving a dimension, specification, or machine process. |
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CAM (Computer-Aided Manufacturing) |
Refers to computer-controlled automation of the various manufacturing processes used in modern industry. |
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CAM |
A rotating shape for changing circular motion to reciprocating motion. Produces a simple means to obtain irregular or specified predictable, designed motion. |
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Cap Screw |
Usually used as a true screw, it passes through a clearance hole in one part and screws into another part. |
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Carburize |
To heat a low-carbon steel to approximately 2000 degrees Fahrenheit in contact with material that adds carbon to the surface of the steel. |
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Case Harden |
To harden the outer surface of a carburized steel by heating and then quenching. |
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Case Hardening |
The process of hardening the outside surface of a part to a preselected depth.
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Cast Irons |
Metals in a family of cast ferrous metals. |
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Casts Steels |
Steels that are produced in ingot form by melting all component elements together and pouring molten metal into a mold. |
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Casting |
A process of pouring molten metal into a mold that contains that desired shape in the form of a cavity. |
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Cavalier Drawing |
A type of drawing in which a receding axis is drawn between 30 degrees and 60 degrees to the horizon, and the receding distances are drawn full size. |
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Center Drill |
A special drill to produce bearing holes in the ends of a workpiece to be mounted between centers. |
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Center Line |
A type of line used in drafting to indicate the center of an object; its main characteristics is that it is a broken line with one short dash in the center. |
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Central Angle |
An angle formed by two radical lines from the center of circle. |
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Central processing Unit (CPU) |
A unit of a computer that includes circuits controlling the interpretation and execution of instructions. |
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Centrifugal Casting |
A process of pouring a measured amount of molten metal into a rotating mold. |
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Ceramics |
Materials made by combining metallic and nonmetallic elements. Their main characteristics are that they have a high melting point, low conductivity, and are chemically and thermally stable. they are mainly used in electronics applications. |
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Chains and Sprockets |
Used to transmit motion and power to shafts that are parallel to each other. |
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Chain Dimensioning |
Successive dimensions that extend from one feature to another, rather than each origination at a datum. |
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Chain Intermittent Weld |
A weld where each weld is applied directly opposite to each other on opposite sides of the joint. |
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Chamfer |
A beveled edge normally applied to cylindrical parts and a variety of different types of fasteners. |
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Channel Jig |
A variation of the basic box jig. |
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Character |
Letter, digit, or other symbol that is used as part of the organization, control, or representation of data. |
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Chase |
To cut threads with an external cutting tool. |
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Check Valves |
Used to restrict the flow of liquids through a pipe t one direction only. |
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Cheek |
In sand casting, this is a section that might be installed between the cope and the drag. |
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Chemical Milling |
A process that etches or shapes work-pieces to close tolerances by chemically induced material removal. |
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Chill |
To harden the outer surface of cast iron by quick cooling, as in a metal mold. |
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Chord |
Any straight line whose opposite ends terminate on the circumference of the circle. |
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Chordal Addendum |
The distance from the top of the tooth to the point at which the chordal thickness is measured. |
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Chordal Thickness |
The length of the chord measured straight across tooth, not along the pitch diameter as is the circular thickness. |
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Chuck |
A device mush like a vise, having movable jaws that grip and hols a rotating tool or workpiece. |
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Circle |
A closed curve with all points at the same distance from the center point. Its major components are the diameter, the radius, and the circumference. |
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Circular Pitch |
The distance between corresponding points of adjacent teeth measured on the circumference of the pitch diameter. Also, the length of the arc along the pitch circle between the center of one gear tooth and the center of a next. |
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Circular Runout |
A tolerance that identifies an infinite number of elemental tolerance zones on a feature when the feature is rotated 360 degrees for each element. |
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Circularity |
Sometimes referred to as roundness, it is a feature control for a surface of revolution (cylinder, sphere, cone etc.) It specifies that all points of a surface must be equidistant from the center line or axis of the object in question. |
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Circumference |
the distance around the outer surface of a circle. |
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Civil Engineer's Scale |
Also called a decimal-inch scale; measurements are read directly from the scale. Each graduation is equal to 1/10 of an inch if the number in the corner is 10. |
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Clapper Box |
This is where the cutting tool is mounted on the end of the ram in this unit. |
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Clearance Fit |
A condition between mating parts in which there is always a clearance assembly. This is when the least material condition of the shaft is subtracted from the least material condition of the hole. |
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Clearly Defined Ground Rules |
In a team situation, these are rules that are thoroughly understood and subscribed to by all team members. They state clearly what behaviors are expected of team members, including what will be tolerated and what will not. |
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Clockwise |
Rotation in the same direction as the hands of a clock. |
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Closed Jigs |
Jigs that enclose the part on more than one side, and are intended to machine the part on several sides without moving the part from the jig. |
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Coil (turn) |
One full turn or 360 degrees of the wire about the corner axis. |
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Coin |
To from a part in one stamping operation. |
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Cold Rolled Steel |
Bessemer steel containing .12% to .20% carbon that has been rolled while cold to produce a smooth, quite accurate stock. |
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Collar |
A round flange or ring fitted on a shaft to prevent sliding. |
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Compass |
An instrument for describing circles or transferring measurements. It consists of two pointed branches joined at the top by a pivot. |
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Composites |
Materials created by combining two or more materials. |
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Compound
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This occurs when more than one operation takes place on a part during a single stroke. |
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Compression Spring |
Offers resistance to a compressive force or applies a pushing action. In this free state, the coils of the spring do not touch. |
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Compressive Force |
A force that "goes into" the joint |
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Computational Fluid Dynamics (CFD) |
A means |
