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Jig And Fixture > Vocabulary > Flashcards

Vocabulary Flashcards

1
Q

Adjustable Locator

A

A screw locator that is used for workpieces of varying size. Adjustable locators are frequently used for cast parts.

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2
Q

Air Clamping System

A

A clamping system that uses high-pressure air to power clamps in order to hold a workpiece in place.

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3
Q

Angle Plate Fixture

A

A fixture that positions the locating surface at an angle to the machining table. It is essentially a plate fixture used at an angle.

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4
Q

Angle Plate Jig

A

A jig that positions the locating surface at an angle to the machining table. It is essentially a plate jig used at an angle.

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5
Q

Base PLate

A

The foundation or frame upon which workholding components such as locators and clamps are built up. It is also called a tool body or subplate.

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6
Q

Block Locator

A

A locator that provides a wall for the part to be wedged against.

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7
Q

Bolting

A

The process of mechanically attaching two or more pieces through the use of threaded fasteners, or bolts.

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8
Q

Boring Machine

A

A turning machine used to enlarge preexisting holes with single-point and multi-point cutting tools.

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9
Q

Box Jig

A

A jig that completely encloses the workpiece so that it may be machined from multiple sides. A box jig is occasionally called a tumble or rollover jig.

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10
Q

Bushing

A

A hardened steel tube used to guide cutting tools such as drills and reamers.

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11
Q

Cam-operated Clamp

A

A clamp that uses a gradual curved surface to lock itself in place. Cam clamps may be dislodged by excessive vibration.

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12
Q

C-Clamp

A

A screw clamp in a C-shaped frame. The C-clamp is a versatile clamp and is widely used.

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13
Q

Channel Jig

A

A jig that forms a “U” shape and surrounds the workpiece on three sides.

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14
Q

Chuck

A

A workholding device that grips a revolving workpiece or cutting tool on machines such as the mill, lathe, or drill press. The jaws of a chuck may be actuated manually, hydraulically, or electrically.

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15
Q

Clamp

A

A workholding device that maintains the position of a workpiece by holding it in place against locators.

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16
Q

Clamping

A

An operation that holds the workpiece against the locators. Clamping resists secondary tool forces.

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17
Q

CNC Machine

A

A machine that is controlled by a computer running programs driven by numerical data.

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18
Q

CNC Machining Center

A

A sophisticated CNC machine that can perform multiple machining operations in the same setup with a variety of tools.

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19
Q

Collet

A

A slitted device that holds a workpiece in place as it rotates. A collet has a hole through which the workpiece passes, and it is designed to hold specific dimensions.

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20
Q

Computer Aided Design

A

The use of computer software that facilitates the manufacturing of materials. These software applications create an image of the workpiece and the necessary machining steps.

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21
Q

Conterbore

A

A cutting tool used to enlarge the end of an existing hole.

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22
Q

Conterboring

A

An operation that enlarges the end of a predrilled hole to allow room for a head of a screw or nut.

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23
Q

Critical Surface

A

An important surface of the workpiece that determines the appropriate workholder design.

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24
Q

Cutting Tool

A

A device that removes metal by creating chips.

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25
Q

Drill

A

A multi-point cutting tool used to make round holes.

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26
Q

Drill Jig

A

A jig that holds a workpiece in place and contains a bushing to help guide the cutting tool to a specific location.

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27
Q

Drill PLate

A

The top plate of a jig that contains the bushings.

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28
Q

Drilling

A

An operation that produces a round hole with a rotating cutting tool.

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29
Q

Electrostatic Chuck

A

A workholding device that is used to hold conductive material. Mutually attracting fields in the chuck and workpiece allow the part to be held during light milling and turning operations.

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30
Q

Fastener

A

A device used to hold pieces together. Some common fasteners include screws and bolts.

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31
Q

Fixture

A

A workholding device used on machine tools to position and hold a part during various machining operations.

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32
Q

Fixture Key

A

A key used to locate jigs and fixtures in machine tables.

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33
Q

Headed Bushing

A

A bushing that contains a ridge at the top. The larger outer diameter of the head sits above the jig.

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34
Q

Headless Bushing

A

A bushing without a ridge at the top that is pressed flush with the jig surface.

35
Q

Hydraulic Clamping System

A

A clamping system that uses high-pressure liquids to power clamps in order to hold a workpiece in place.

36
Q

Indexing Jig

A

A jig designed to position a workpiece at specific locations around a rotational axis. Indexing jigs can be used for drilling holes around a workpiece.

37
Q

Inspection Fixture

A

A fixture used to hold a workpiece while it is being examined. Inspections usually involve comparing workpieces with desired measurements for accuracy.

38
Q

Jig

A

A workholder used to position and hold a workpiece while guiding the location of the cutting tool.

39
Q

Journeyman

A

Someone who has served an apprenticeship in his or her trade and is working for someone else in the trade.

40
Q

Lathe

A

A cutting machine commonly used to create cylindrical forms. It is generally considered the backbone of the machine shop.

41
Q

Leaf Jig

A

A type of jig designed with a hinged plate that swings open for easy loading and unloading of workpieces.

42
Q

Liner Bushing

A

A type of bushing that is permanently installed in place and acts as a sleeve for renewable bushings.

43
Q

Locating

A

The process of positioning the workpiece in a designated location. Locating is also used to describe the precise positioning of the workpiece in the horizontal plane.

44
Q

Locating Point

A

A point on the workholder that is meant to contact the workpiece while it is being positioned.

45
Q

Location Dimension

A

A dimension that establishes the position or location of shapes relative to each other. For example, a hole center that is 3 inches from the edge specifies a location dimension.

46
Q

Locator

A

A workholding device used to position a workpiece within a jig or fixture. Locators establish a relationship between the workpiece and the workholder.

47
Q

Magnetic Chuck

A

A workholding device that is used to hold large ferrous parts. It is commonly used on surface grinders or for light milling and turning operations.

48
Q

Manual Clamp

A

A clamp that is secured by hand by the operator. Cam, screw, and toggle clamps may all be manually operated.

49
Q

Milling

A

A machining operation that uses a multi-point horizontal or vertical cutter to remove metal from the surface of a workpiece.

50
Q

Milling Fixture

A

A fixture that holds a workpiece during a milling operation.

51
Q

Modular Fixturing

A

A workholding system that uses standard reusable components to construct a workholder.

52
Q

Multistation JIg

A

A jig used to hold one workpiece at several stations. A box jig frequently acts as a multistation jig.

53
Q

Pin

A

A device used to locate workpieces by an internal or external surface.

54
Q

Plate Fixture

A

The most basic type of fixture that contains mounted clamps and locators on a plate for holding the workpiece parallel to the table of a machine.

55
Q

Plate Jig

A

A simple workholder recognized by its plates. The plate jig also holds the workpiece.

56
Q

Press-fit Bushing

A

A basic type of bushing that is pressed into the drill plate without the use of liner bushings. Press-fit bushings are most often used for short production runs.

57
Q

Prototyping

A

The process of creating the first products as a test for a full production run.

58
Q

Pump jig

A

A type of jig that uses a handle or lever to move the top bushing plate toward and away from the workpiece.

59
Q

reamer

A

A cutting tool with straight cutting edges used to enlarge or smooth holes that have been previously drilled.

60
Q

renewable bushing

A

A type of bushing that is temporarily installed in a liner bushing and replaced after excessive wear. Renewable bushings are typically used for long production runs.

61
Q

retractable locator

A

A locator that is held in place with a spring and retracts for workpiece loading and unloading.

62
Q

Sandwich Jig

A

A type of jig that uses two jig plates to “sandwich” workpieces so that they can be machined on two sides.

63
Q

Screw Clamp

A

A type of clamp that locks securely in place by the turning of threaded devices. A screw clamp is often slow but secure.

64
Q

Screw Locator

A

An adjustable locator that uses a threaded device to locate the workpiece. Adjustable locators are most often used to accommodate parts that vary in size.

65
Q

Size Dimension

A

A dimension that establishes the magnitude of the feature without reference to other features.

66
Q

Spring-Loaded Locator

A

A type of locator used for surfaces that vary in size and position.

67
Q

Strap Clamp

A

A type of clamp that reaches over the workpiece to hold it in place. Strap clamps are often used when extra toughness is required.

68
Q

Subplate

A

Another name for the base plate or tool body.

69
Q

Swing Clamp

A

A clamp containing a swinging arm that moves to facilitate the quick loading and unloading of workpieces.

70
Q

Table Jig

A

A variation of the plate jig that is raised up by attached legs. It is used when the surface to be machined also locates the workpiece.

71
Q

Tap

A

A multi-point tool that is used to cut internal threads into a hole.

72
Q

Tapping

A

The process of cutting internal threads in a workpiece with a multi-point tool.

73
Q

Toe Clamp

A

A type of clamp with a serrated surface that reaches forward and down to grip the workpiece.

74
Q

toggle clamp

A

A type of clamp that operates on a pivot and lever system. Toggle clamps lock just past the center of the pivot points.

75
Q

tolerance

A

The unwanted but acceptable deviation from the desired dimension.

76
Q

Tool and Die Maker

A

A machinist who makes special tools including fixtures, dies, and gages required for production.

77
Q

Tool Body

A

The foundation of the workholder. The various components, such as locators and clamps, are fastened to the tool body to make each workholder unique.

78
Q

Transfer Line

A

A process that involves assembly-line drilling. It has been replaced by the CNC machining center.

79
Q

Universal Jig

A

A mass-produced workholder that can be adapted. Universal jigs are cheaper than custom-build jigs or fixtures, but they have a smaller range of applications.

80
Q

Vacuum Chuck

A

A workholding device that can be used on any material workpiece. A vacuum is created by sealing workpiece holes. It may be used in light milling and turning operations.

81
Q

Welding

A

The joining of two pieces of metal together through the application of heat.

82
Q

Welding Fixture

A

A fixture that holds a workpiece during a welding operation.

83
Q

Workholder

A

A device used to position and hold a workpiece. The workholder references the tool performing the operation on the part being held.

84
Q

Workpeice

A

A part that is being worked on. It may be subject to cutting, welding, forming or other operations.

Jig And Fixture (1 decks)

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