Advanced Assembly Extension Top Down Design Demo

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Pro/ENGINEER Concurrent DesignTop Down Design
Large Assembly Management
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Agenda

• Top-Down Design Philosophy
• Stages of Top Down Design
• 3D Design
• Tip Tricks
• Question Answer

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Objectives

• At the end of this tutorial, you will better
  understand how to
• Capture knowledge, or design intent, allowing you
  to concentrate on significant issues by making
  the software perform tedious, repetitive
  calculations.
• Enable the framework for interchangeability of
  components allowing for high-velocity product
  development by supporting rapid iterations of
  product variations.
• Create a concurrent design environment by
  spreading project design responsibility across
  many organizational levels.

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• Top-Down Design Philosophy

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Traditional Design Approach

• Bottom-Up Design
• Design of individual components independent of
  the assembly
• Manual approach to ensure that components fit
  properly and meet the design criteria
• Components and those placed in sub-assemblies are
  brought together to develop the top-level
  assembly
• Errors are manually identified and modifications
  to each component are made to make the
  adjustment. As assembly grows, detecting these
  inconsistencies and correcting them can consume a
  considerable amount of time

Top Level Assembly
Component Design
Component Design
Component Design
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Top-Down Design Philosophy

• Top-Down Design
• Method of placing critical information in a
  high-level location
• Communicating that information to the lower
  levels of the product structure
• Capturing the overall design information in one
  centralized location

Design Information
Component
Component
Component
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Why should you use it?

• Benefits
• Reduced design time
• Reduced errors (right the first time)
• Increased quality
• Better project management visibility
• Concurrent engineering
• Confidence in top-level regeneration
• Knowledge of how modules interface
• Top-level change control

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Example to design an alternator...

• What information should a designer need to work
  with most times?

Neighboring Subassemblies 320MB
Complete Top-Level Assembly 540 MB
All Skeleton Models in Top-Level Assembly 70 MB
Subassembly, with Skeleton Model containing
all required information 20 MB
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• Stages of Top Down Design

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Stages of Top Down Design (TDD)

• Conceptual Engineering
• Layouts and Engineering Notebook
• Preliminary Product Structure
• Model Tree, PDM (i.e. Benevolent Dictator)
• Capturing Design Intent
• Skeleton Models
• Manage Interdependencies
• Reference Control Viewer
• Communication of Design Intent
• Copy Publish Geometry
• Population of the Assembly
• Constraints Component Interfaces

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Conceptual Engineering PhaseLayouts and
Engineering Notebook
Stage 1

• Understand Existing Situation
• High-level Requirements
• Space Allocation
• Define New Space and Motion
• 2D Sketches
• 3D Models
• Rapid Iteration Convergence
• Animations
• Capture Key Design Intent
• Parameters
• Notes
• Relations / Calculations
• Interfaces

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Product Definition Engineering Layout

• What it is

• First thing done in design cycle

• Used to evaluate key interface points

• Used to evaluate key components of project

What it is Not

• Three dimensional solids

• Fully detailed

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Advantages of Using a Layout

• Document design information in one centralized
  location
• Document design information before creating solid
  models
• Investigate design options without involving the
  entire assembly
• Easily make design changes because all of the
  design information is contained in one location

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Preliminary Product Structure Phase Model Tree
and PDM
Stage 2

• Quickly define product hierarchy
• Before any of the components geometry is defined
• Intuitive, automatic mapping to start models
• Templates ensure all designs share the necessary
  common elements such as datums, layers, views,
  parameters, etc.
• Foundation for efficient task distribution
• Component Creation Methods
• Empty Components Copy from start models
• Automatic assembly of default datums
• Unplaced Partially-Constrained Components

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2 Product Definition Assembly Structure

• What it is

• Virtual Assembly / BOM

• Used to organize assembly assigning of design
  tasks

• Used to input non-geometrical data up-front

What it is Not

• Three dimensional solids

• Fully detailed

• Fully constrained

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Advantages of Defining Preliminary Product
Structure

• Defining the product structure prior to defining
  geometry can assist you in organizing the
  assembly into manageable tasks that can be
  assigned to design teams or individual designers.
• Associate specific library parts (that are to be
  used on the project) with the assembly at the
  start of the design, preventing confusion later.

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Advantages of Defining Preliminary Product
Structure

• Cont
• Submit the assembly to Pro/INTRALINK or PDMLink
  (or FIT dictator) and assign models to the
  appropriate vaults or folders.
• Individual designers can focus on specific design
  tasks instead of on how their design is going to
  fit into the overall structure.
• Input non-geometrical information such as the
  part number, designers name, etc., at a very
  early stage.

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Capturing Design Intent Phase Skeleton Models
Stage 3

• What needs to happen?
• Capture conceptual design parameters within the
  context of the assembly
• Capture control critical object interfaces in
  a single, convenient location
• How? Skeleton Models
• Centralized pathway for communication
• Facilitate task distribution
• Promote well-organized design environments
• Enable faster, more efficient propagation of
  change
• Special Treatment in BOMs, Simplified Reps,
  Drawings, Model Tree Mass Property Calculations
• Uniquely supported Scope Control Setting

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3 Product Definition Skeletons

• What it is

• Zero-mass geometry

• Exact location detail

• Minimized geometric detail

What it is Not

• Three dimensional solids

• Fully detailed

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Advantages of Using Skeletons

• Provides a centralized location for design data
• Simplifies assembly creation / visualization
• Aids in assembling mechanisms
• Minimizes unwanted parent-child relationships
• Allows you to assemble components in any order
• Controls propagation of external references

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Manage Interdependencies PhaseReference Viewer
Reference Graph
Stage 4

• Tools to Manage References
• External Reference Control
• Ensures Top-Down Design methodology is followed
• Incorporate design management rules directly into
  the design
• Ensures proper design reuse
• Model Tree
• Global Reference Viewer
• Reference Graph

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Reference Control

• Benefits of Communicating Information From a
  Central Source
• Task distribution
• Concurrent modeling
• Managing external references
• Tools
• Layout Declaration
• Publish geometry
• Copy geometry
• The foundation is set but topologically
  modifiable its time for 3D.
• With Reference Control Manager, you are safe to
  create your parts directly in the assembly.

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Hierarchy

• Top_level.asm
• Top_level_skeleton.prt
• Sub_assy_1.asm
• Sub_assy_1_skeleton.prt
• Sub_assy_2.asm
• Sub_assy_2_skeleton.prt
• Sub_assy_x.asm
• Sub_assy_x_skeleton.prt

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• 3D DESIGN FINALLY!

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Communication of Design Intent Phase Publish
Geoms, Copy Geoms
Stage 5

• Publish Geometry Features
• Provides ability to pre-determine the geometry to
  be referenced by a Copy Geometry feature
• Allows designers to define their interfaces to
  the rest of the design
• Copy Geometry Features
• Allows copying of all types of geometry
• Surfaces, edges, curves, datums, quilts,
  copy/publish geometry
• Retains copied geometry name and layer settings
• Dependency on parent geometry can be toggled
• Can be Externalized
• External Copy Geometry
• Build relationships on external models
  independent of an assembly
• Useful for coordinate system assembly practices
• Simplified Representations, Display States
  Shrinkwrap

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Population of the Assembly PhaseAutomatic
Component Constraints Component Interfaces
Stage 6

• What tools are available for populating the
  assembly?
• Assembly Tools
• Drag Drop Placement
• Component Interfaces
• Component Creation
• Within the context of the assembly
• Mirror Parts or Subassemblies

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Highlights of Top-Down Design

• Capture knowledge, or design intent, allowing you
  to concentrate on significant issues by making
  the software perform tedious, repetitive
  calculations.
• Enable the framework for interchangeability of
  components allowing for high-velocity product
  development by supporting rapid iterations of
  product variations.
• Create a concurrent design environment by
  spreading project design responsibility across
  many organizational levels.

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• Tip Tricks

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Miscellaneous Tips

• Separate Part Versus Assembly for Skeleton
  Features
• Avoid constructing assembly-level skeleton
  features since the system requires that you
  perform all edits of these features in Assembly
  mode.
• The components can become an obstruction and
  degrade performance.
• Furthermore, you cannot easily reuse skeleton
  features at the assembly level in other
  subassemblies. By using a separate part file,
  you can edit the feature in Part Mode and
  reassemble it into many different assemblies.
• Geometry Features
• Place all static information in a skeleton as
  early as possible and place all dynamic
  information later in the design process cycle.

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Miscellaneous Tips

• Datums for Skeleton Models
• Consider renaming skeleton datums to sk_
• Visualization
• Use simplified reps and transparency prolifically
  to make viewing easier
• Use display states to highlight different items
  at different times
• Use surfaces to clarify meaning of centerlines
  axes
• Conceptualization
• Dont be afraid to use simple hand sketches
  before delving into complex situations its NOT
  illegal

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Simplified Representations Performance Focused
Tools

• Tools to manage the type and amount of data in
  session
• Graphics Only Reps
• Graphical component display only
• No feature tree, measuring, modifications
• Show relations, material, parameters, etc.
• Geometry Only Reps
• Graphics Rep, plus
• Reference and Measure capabilities
• Explode, Package, Routing Apps
• On Demand
• Automatically bring information into session as
  needed, then remove

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Shrinkwrap Performance Metric
Original Transmission
Surface Subset
File size 23MB Quality Level 6
File size 147MB