Model-Based Definition using Creo Parametric and … WHAT YOU’RE MISSING U2U ConferenceU2U...

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Model-Based Definition using Creo Parametric and GD&T Advisor

Ted Anderson Product Line Manager

Sigmetrix, LLC

SEE WHAT YOU’RE MISSING U2U Conference

Model-Based Definition

What is it?

Why Model-Based Definition?

What tools are required to define the model?

What are the down-stream benefits?


Modeling Paradigms

Drawing-based

• Master 2D Drawing

Model-Centric

• 3D CAD Model

• Master 2D Drawing

Model-Based Definition

• Master 3D CAD Model


Definitions

MBD: Model Based Definition; i.e., what a design engineer creates within CAD software to express design intent

MBE: Model Based Enterprise; i.e., an organization that reuses model-based definition for downstream applications and processes


Model-Based Environment

Model

3D Drawing

Tolerance Analysis

Cost Estimation

Automated Inspection

Other?


What is Model-Based Definition?

Also known as: Digital Product Definition

Standards defined in:

– ASME Y14.41-2003

– ISO 16792:2006


What is the “model”?

Definitions (from ASME Y14.41-2003) – Model – a combination of design model, annotation

and attributes that describes the product

– Design model – the portion of the data set that contains model and supplemental geometry

– Annotation – dimensions, tolerances, notes, text, or symbols visible without any manual or external manipulation

– Attribute – a dimension, tolerance, note, text or symbol required to complete the product definition or feature of the product that is not visible but available upon interrogation of the model


A “model” includes more than geometry!

Model

Design Model

Annotations

Attributes

Visible dimensions, tolerances, geometric tolerances, and notes

Parameters, material properties, etc.

Model geometry


A “model” includes more than geometry!

Design Model + Attributes + Annotations = Model


Why Model-Based Definition?

Establishes clear design authority ("the model is the master")

Enables elimination of redundant tasks and information

Enables reuse of model definition data in downstream applications and processes throughout the manufacturing enterprise


When will all of this happen?

Enabling technology is available now

Many downstream applications are available now

Many companies are investigating the tools and processes now

Some leading-edge companies have already begun MBE implementation

DoD is pushing MBE


MBD and Department of Defense

DoD agencies (NIST, OSD, DLA, etc.) are working to eliminate drawings from the defense supply chain

– NIST released MIL-STD-31000 Rev A in Feb 2013:

• New 3D definition for Technical Data Package

• Sets contract requirements for delivering technical data

• MBD is a contract requirement for new programs

• PDF (3D PDF) is preferred delivery format


DoD is shifting to Model Based Enterprise

Eliminate need for 2D Drawings throughout the DOD & Supply Chain – 3D Technical Data Packages: Complete Product Definition – 3D Animated Work Instructions: Complete Process

Definition – 3D Inspection Documents: Advanced Inspection

Procedures – 3D RFP/RFQ—Low-Cost Procurement

Dramatically reduce costs for procurement throughout the DOD supply chain – Eliminate dependency on proprietary CAD Formats – Deploy complete Product Definition within lightweight 3D

PDF TDPs – Deploy complete Manufacturing Best Practices within

animated 3D PDF MBEs – Allow Product and Manufacturing data to be Freely

deployed on standard platforms (FREE Adobe Reader & FREE HTML5 Browsers)

Slide courtesy of ANARK


Why the paradigm shift?

Lower Cost – A DLA survey showed that if a modern tech data package was

provided to the supplier, it would help reduce the procurement cost of a part by almost 27% • This will reduce DOD procurement costs by 27%

– The survey noted that suppliers would be able to reduce the cost of quoting, which accounts for 8% of the bid • This will reduce supplier costs by 8%

Faster Delivery – The DLA survey indicated that almost 19% of supplier scrap

and rework was due to poor TDP quality • This will reduce scrap and rework costs by 19%

– 3D TDP will help streamline the creation of process plans and decrease the chances for manufacturing errors

– Suppliers will be able to use model data to rapidly create instructions for production operations and inspection

Focused on the War Fighter

Slide courtesy of ANARK


MBD in Creo Parametric 2.0

Annotation tools in Creo 2.0:

– Apply Geometric Tolerances

– Specify tolerances for dimensions

– Create 3D notes


GD&T in Creo

Creo tools for creating geometric tolerance annotations are rudimentary

– No standards-based rules

– No automatic checking

– No guidance for the user

– Very mouse-click intensive and prone to error

The tools available for creating GD&T in Creo are not sufficient for an model-based enterprise


GD&T Advisor An embedded Creo application

Creates native Creo GD&T annotations

Uses an intuitive GD&T dashboard, guaranteeing proper application of GD&T

In process help to guide and educate the user

Feature-centric view of GD&T

Informative advisor messages to guide the user

through the process

Wizard-like dashboard guides

the user in the correct

application of GD&T

Create native Creo®

annotations to maximize reusability


GD&T Advisor Benefits

Supports MBD

– Creates annotations in the model so they can be reused downstream

Fast and efficient

– About %75 fewer mouse-clicks required to create annotations (compared to native Creo tools)

Correct and complete GD&T on the model

– Rules-based filters, annotation placement and validation

Promotes GD&T knowledge and understanding


GD&T Advisor

Available for:

– ASME Y14.5M-1994

– ISO 1101:2004 and related standards

A critical part of the model-based enterprise



Combination States

– A tool for managing views and annotations

– Defines a 3D view that is analogous to a 2D drawing view



Annotate Ribbon

– Provides functionality for defining combination states and annotations

• Add or delete Combination States

• Add annotations on specified annotation plane

• Manage annotations similar to the way they can be managed in a drawing



3D Detail options

– Control the appearance of 3D annotations

– Similar to drawing detail options for controlling drawing appearance


MBD and GD&T

In order to fully leverage the advantages of MBD:

– GD&T must be applied to the model (rather than defined in a 2D drawing)

– GD&T must be applied in accordance with the specified tolerancing standards

– GD&T must faithfully represent the design requirements

– GD&T must by correct and complete


Defining the model

Creo Parametric 2.0 GD&T Advisor


Model-Based Environment

Model

3D Drawing

Tolerance Analysis

Cost Estimation


Other?


Downstream uses for MBD

Model

3D Drawing

Tolerance Analysis

Cost Estimation


Other?


Why do we use 2D drawings?

Drawings have been the "visual language" of engineering for hundreds of years

Drawings provide critical manufacturing information like datums, dimensions, tolerances, etc. – Until recently it hasn't been possible to express this information within

a 3D environment

Drawings are "easier to deal with" vs. 3D CAD models – 2D TIFFs and PDFs, are smaller, easier to send, and can be opened

without an expensive 3D CAD software license

"Everyone" knows how to use them (2D drawings) – 2D drawings (printed or electronic) can easily be redlined, reviewed,

marked up, etc.


Why should we eliminate 2D drawings?

Model vs. Drawing: Which is the master? – DoD: 60% of supplier data where model and drawing don’t agree

Time and effort to create and maintain drawings – 30% total product development budget

Response times to/from suppliers much faster – 50% reduction in supplier response time in MBE

There are better solutions for communicating design intent – ...and eliminating ambiguities, scrap, rework, etc.

Conclusions from NIST/US Army Supplier Survey: http://model-based-enterprise.org/docs/ARDEC-3DTDP-assessment-findings.pdf

http://model-based-enterprise.org/docs/ARDEC-3DTDP-assessment-findings.pdf












3D Drawings

Available in many formats

– 3D PDF

• Viewable in Adobe reader

– HTML/WebGL

• Viewable in modern browsers (plug-in required)

– JT

– STEP AP214

– Proprietary formats (e.g., Creo View)


3D Drawings - Advantages

Automatic creation from model

Unambiguous

Non-redundant data and effort

Interactive query and measure tools, etc.


Annotation Query

GD&T that has been applied with GD&T Advisor in Creo is properly associated with the applicable surfaces (in accordance with ASME Y14.41-2003)


3D PDF Example

Models/eng_block_front.pdf


HTML/WebGL Example

Models/MBEWorks HTML/index.html



Model

3D Drawing

Tolerance Analysis

Cost Estimation


Other?


Tolerance Analysis

CETOL 6 v8.3 – Import feature annotations from the CAD model

• Imported dimensions and gtols are linked to the related CAD annotation

• Linked objects automatically update (eliminates data entry and related errors)


Futures: CETOL 6 v9

Will read GD&T Advisor data

– Automate the tolerance analysis process at the part level

– Completely eliminates redundant effort for defining dimensions and tolerances



Model

3D Drawing

Tolerance Analysis

Cost Estimation


Other?


Cost Estimation

MBD models include most of the data that affects part cost: – Model geometry – Material & other

attributes – GD&T & dimensional

tolerances

Downstream applications are available that provide accurate cost predictions



Model

3D Drawing

Tolerance Analysis

Cost Estimation


Other?



GD&T defines quality requirements

Inspection confirms whether requirements are met

Downstream applications are available that integrate the CAD data (geometry and annotation data) with the inspection process


A complete model is required!

Model

3D Drawing

Tolerance Analysis

Cost Estimation


Other?


Conclusions

Model-Based Definition can be achieved with Creo Parametric 2.0 and GD&T Advisor

Eliminating drawings in favor of MBD can result in significant savings

There are a multitude of downstream uses for MBD

Model-Based Definition using Creo Parametric and … WHAT YOU’RE MISSING U2U ConferenceU2U...

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