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ISAT 211 > Test 2 > Flashcards

Test 2 Flashcards

0
Q

Layout Drawings

A

A pure geometric representation of an entire assembly prepared in initial design stages to resolve spatial issues and tradeoffs without full attention of dimensioning or presentation

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1
Q

For effective communication, drawings must be…

A

Clear: easy to understand and interpret (not ambiguous) Complete: no missing info, particularly dimensions Accurate: free of errors

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2
Q

Detail Drawings

A

Supplies complete detail for making a single part including its shape and size descriptions, material call-out and specifications of tolerance and surface finish

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3
Q

Assembly Drawings

A

Depicts assemblies of fully detailed component parts, arranged as they appear in the final assembly

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4
Q

Title Block

A

Contains identifying information such as a part number, it’s revision and title or description, the name of the company, scale if any, and default values for tolerance and surface finish

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5
Q

Lines which define basic geometry form are…

A

Visible lines Hidden lines Center lines

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6
Q

Lines associated with dimensions are…

A

Extension lines Dimension lines

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7
Q

Pointing and advisory lines include

A

Leader lines Break lines Cutting plane and Section lines

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8
Q

Projections

A

Graphical representatives used to describe 3D objects onto 2D paper

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9
Q

Types of Projections

A

Pictorial: isometric, oblique, and perspective useful for general illustrations Orthographic: used exclusively for technical drawings

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10
Q

Orthographic Projections

A

In ortho projections images of an object are projected on planes as they appear to the eye when viewed from 3 orthogonal directions FRONT TOP SIDE

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11
Q

Orthographic Projection: 1st Angle

A

Used in Europe and some Pacific rim countries The object is between the observer and protection plane

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12
Q

Orthographic Projection: 3rd Angle

A

Used in the US, Canada, and Japan The protection plane is between the observer and object

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13
Q

Sectional Views

A

Sections show interior details that are too complex to represent with hidden lines

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14
Q

Concentric Cylindrical Features

A

Best shown in a longitudinal (side) view

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15
Q

One-view Drawings

A

Use symbol ø (metric) outer the abbreviation DIA (inches)

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16
Q

Circular Arc

A

Dimensions via its radius

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17
Q

Cylindrical Holes

A

Dimension with a leader pointing to the hole and the diameter is preceded by ø or followed with DIA

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18
Q

Circular Tapers

A

Use a suitable combination

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19
Q

Flat Tapers

A

Dimensioned in a fashion similar to circular tapers

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20
Q

Chamfers

A

Dimensioned via length and angle

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21
Q

Undercuts

A

Dimensioned with a note specifying width followed by diameter

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22
Q

Dimensioning System

A

The choice of dimensioning systems depends on whether the drawing is intended for BATCH (general purpose tools and gages) or MASS PRODUCTION (specialized tools/gages)

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23
Q

Coordinate Dimensioning System

A

Defines distance, location, and size by means of linear dimension measured from reference axes or datum plane

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24
Q

True Position Dimension

A

Features defined in terms of their most likely or mean position

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25
Q

Polar Coordinate System

A

Defines position by means of a radius and an angle

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26
Q

Chain and Datum Dimension

A

Dimensioning of feature sequentially in a chain-like manner or from a common reference (datum) point or line

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27
Q

Negatives to Coordinate Dimensioning

A
  • Only implies and does not precisely define how dimensions are to be measured for checking
  • When no datum is specified, coordinate dimensions apple on point-to-point basis (Fig. 40)
  • When datum feature is given (Fig. 41) measurement is made from the theoretical datum, not from the actual feature itself
  • Coordinate Dimensioning does not specify straightness, meaning the part could be within the thickness size tolerance but could be significantly bowed and unacceptable
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28
Q

GD&T must be…

A
  1. Complete
  2. Functional
  3. Max Tolerances
  4. Clear
29
Q

Datum Reference Frame

A

Datum references made in a feature control frame determine where a part is located in the datum reference frame

30
Q

Feature Control Frame

A

a rectanle which is divided into compartments within which the geometric characteristic symbo, tolerences, value, modifiers, and datum regerences are placed.

31
Q

Maximum Material Condition

A

refers to the feature-of-size that contains the greatest amount of material, yet remains within its tolerence zone

  • Has the largest pin diameter
  • has the smallest hole size
32
Q

Least Material Condition

A

refers to a feature of size containing the least amount of materials, yet remains within its tolerance zone

  • Has smallest pin diameter
  • Has largest hole size
33
Q

Manufacturing Process

A

Also known as process planning, is the process a product goes through starting with its raw materials and ending with the final product.

34
Q

Production Process

A

Production Prosses are used to make any manufactured item.

  1. Source the parts needed
  2. Make the product
  3. Deliver the product
35
Q

Lead Time

A

the time needed to respond to a customer order

36
Q

Customer Order Developing Point

A

Where inventory is positioned to allow entities in the supply chain to operate independently.

37
Q

Lean Manufacturing

A
  • a means of achieving high levels of customer service with minimal inventory investment.
  • use lean manufacturing to achieve a higher service level for a given inventory investment.
38
Q

Make-to-Stock

A
  • serve customer from finished goods inventory
  • Ex: tv’s, clothing, packaged food products
  • Issues: balance the level of inventory vs. the demand
39
Q

Assemble-to-Order

A
  • Combine the number of preassembled parts to meet customer specifications.
  • Ex: Dell Computers makes their desktop computers with different components and styles.
  • Need a design that enables flexibility for combing components.
40
Q

Make-to-Order

A

make customer product from raw materials, parts, and components

41
Q

Engineer-to-Order

A

designing with customer to make the product

42
Q

Project

A
  • the product remains in a fixed location (manufacturing equipment is moved to the product)
    • remains in a fixed location
    • high degree of task ordering
    • project layout maybe developed by arranging materials according to their assembly
43
Q

Workcenter (Job Shop)

A
  • similar equipment or functions are grouped together
    • desing workcenters that optimizes the movement of material
    • optimal placement often means placing workcenters with larger interdepartmental traggic adjacent to eachother
    • sometimes is referred to as a departement and is focused on a particular type of operation
44
Q

Manufacturing Cell

A
  • a dedicated area where products that are similar in processing requirements are produced.
    • formed by allocating dissimilar machines to cells that are designed to work on similar products.
45
Q

Assembly Line

A
  • work processes are arranged according to the progressive steps by which the product is made.
    • designed for the special purpose of building a product by going through a series of progressive steps
    • AVOID BOTTLENECKING: having one step wait for another step
46
Q

Continuous Process

A
  • Assembly line only the glow is continuous such as with liquids.
    • designed for the special purpose of building a product by going through a series of progressive steps
    • AVOID BOTTLENECKING: having one step wait for another step
47
Q

Product Process Matrix

A

REFER TO NOTES OR BOOK 10/15/14

48
Q

Make-or-Buy Decision

A
  • What components need to be made?
    • MAKE it yourseld
      • OR
    • BUY it from someone who is already making it
49
Q

Specific Process Selection

A
  • Which process are you going to select in order to create a product
    • most of the time the most efficient way is picked
50
Q

Specific Equipment Selection

A
  • Picking the equipment that will be used to create a product
51
Q

Process Plans (or documentation)

A
  • tells how the product will be made
52
Q

Process Analysis

A
  • Measures its efficiency
53
Q

Break-Even Analysis

A
  • model seeks to determine the point in units produced where a company will start making profit on the process
  • defined as standard approach to choosing among alternative proceses or equipment.
    • A point where Total Revenue (TR) = Total Cost (TC)
  • Equation:

BEP = FC / (R-v);

R=Revenue Price, v=variable price or cost/unit

54
Q

Manufacturing Process Flow Design

A
  • a method to evaluate the sepcific processes that material follow as they move through the plant
  • focus should be on the identification of activities that can be minimized or eliminated.
    • movement & storage
    • the fewer the moves, delays, and storage, the better the flow.
55
Q

Assembly Drawing

A

an exploded view of the product showing its component parts

56
Q

Assembly Chart

A

defines how parts go together, their order of assembly, and overall flow pattern

57
Q

Operation and Route Sheet

A

specifies operations and process routing

58
Q

Process Flowchart (Flow Diagram)

A

denotes what happens to the product as it progresses throught the production facility.

59
Q

Total Quality Management (TQM)

A
  • managing the entire organization so that it excels on all dimensions of products and services that are important to the customer.
  • Goals:
    • Careful design of the product or service
    • Ensuring that the organization’s systems’s can consistently produce the design
60
Q

What is Quality?

A

Fitness for use

61
Q

Dimensions of Product Quality:

  1. Performance
A

basic operating characteristics

62
Q

Dimensions of Product Quality:

  1. Features
A

“extra” items added to basic features

63
Q

Dimensions of Product Quality

  1. Reliability
A

probability product will operate in appropriate manner over time under normal operating conditions.

64
Q

Dimensions of Product Quality:

  1. Conformance
A

meeting pre-established standards

65
Q

Dimensions of Product Quality:

  1. Durability
A

life span before replacement

66
Q

Dimensions of Product Quality:

  1. Servicability or Maintainability
A

ease of getting repairs, speed, and competence of repairs

67
Q

Dimensions of Product Quality:

  1. Aesthetics
A

look, feel, sound, smell or taste of product

68
Q

Dimensions of Product Quality:

  1. Safety
A

freedom from injury or harm

69
Q

Dimensions of Product Quality:

  1. Reliability
A

subjective perceptions based on brand name, advertising, etc.

70
Q
A

ISAT 211 (2 decks)

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