computer Integrated manufacturing

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computer Integrated manufacturing
Larry Whitman whitman_at_imfge.twsu.edu (316)
691-5907 [phone]
Industrial Manufacturing Enterprise
Department The Wichita State University http//www
.mrc.twsu.edu/whitman/classes/ie775
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What is the Manufacturing Enterprise?

• An Enterprise is a complex systemof cultural,
  process, and technology components ...

Enterprise
Enterprise
... a system engineered to accomplish
organizational goals.
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Enterprise Representation

• The Enterprise is a system that has certain
  fundamental processes.

Enterprise

• Set direction

• Acquire customers
• Develop product and process
• Fulfill orders
• Support customerand product

• Acquire resources
• Manage financialassets

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Integration

• Legacy systems - existing systems (many times not
  built for integration)

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Ch 3 - The Computing System
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CAD

• CAD (Computer Aided Design) or Computer Aided
  Design Drafting (CADD) operators use
  mainframes/minis/workstations/micro-computer
  systems to engineer and design complex parts in
  today's manufacturing environment.
• Prior to the 1980's, draftsmen used drawing
  boards, T Squares and a plethora of tools to draw
  blueprints manually
• Now, blueprints, models and complete engineering
  designs are created on personal computers,
  workstations and networked computer terminals.
  Thus the need for manual drawings, pasted-on
  modifications and such have been replaced by the
  superior results achieved by the use of CAD
  systems

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Multiple Views (example)
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CAD multiple views

• Orthographic Drawing
• Wireframe
• Surface Modeler
• Solid - BREP
• Solid - CSG
• Feature
• Parametric

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CAE -

• functionality for a specific application
• must be tailored for the specific application and
  environment

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Workgroup - PDM

• humans

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Ch 4 - CAD/CAM Integration Studies

• Integration of design and manufacturing
• Benefits through local optimums!

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Why minimal integration?

• Only can do what technology permits!!
• Enterprise wide or nothing???

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Examples for paper 2

• I have a textbook full of other examples

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Computervision

• Integration of existing processes

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Overview of Design
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Manufacturing Activities
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Assembly Work Cell
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Strengths/weaknesses of approach
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Simultaneous Engineering (IPD)

• DFM
• DFA
• DFSC
• DFAn
• DFx

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Why IPD???

• of cost determined at design stage (get quote)

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Traditional vs DFM
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The Use of Features
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DFM - architecture
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Shop Floor Integration

• read for yourself

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Ch 5 - Manufacturing Elements of CIM

• Objectives
• to review the mfg and CAM activities
• to understand the integration of these

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MFG

• Discrete Parts
• Process Mfg
• Mass Production
• Batch Production
• Flexible Production
• Job Shop

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CIM

• CAM (Computer Aided Manufacturing) systems are
  used in all modern manufacturing workplaces to
  model parts being constructed in machining
  operations and design processes, not only for
  modeling purposes but for design and quality
  assurance purposes as well!
• CAM systems are used for determining the accuracy
  of design prior to manufacturing.
• Models can be checked for diameters, wall
  thicknesses, stress analysis, clearances and many
  other features determined to be critical before
  the initial workpiece is ever constructed, thus
  eliminating unnecessary production cost as well
  as reducing the time it takes to produce the
  part.
• CAM systems are used to generate the CNC toolpath
  programs used in machining the actual workpieces.
  The great majority of machining done today is
  done on CNC controlled machines and involve the
  end products designed on CAM systems.

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CNC

• CNC ( Computerized Numerical Control) machines
  are designed to accurately produce machined parts
  at a higher rate of speed than manually machined
  parts and with much greater repeatability.
• Like CAD and CAM, CNC machines are related
  through their use of the Cartesian Coordinate
  system.
• Both milling and turning is nearly all done on
  Computerized Numerically Controlled machines

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Three aspects of MFG

• Technological Planning
• Production Scheduling
• Automation and Computer Control

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Technological Planning
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Production Scheduling
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Shop Data Collection

• Machine monitoring
• WIP Tracking
• Time and Attendance recording
• Shipping and receiving recording
• Inventory Control

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FMS example

• Robots

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Next Class

• Chapter 6!
• Read it!
• Be it!
• Live it!
• Other resources (can read articles on web)
• http//www.mrc.twsu.edu/whitman/classes/ie775/lite
  rature1.htm