plm 2008 - the road to 3d pmi

8/2/2019 Plm 2008 - The Road to 3d Pmi

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The Road to 3D PMI

Gili OmriLSRD Technion


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Technion - Land System R&D Division

Materialization of Academic Research projects

Connecting link Academy to Industry

Broad band of R&D Services


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What is PMI?

Product Manufacturing Information

Information required to put across

design intent to production


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PMI Consists:

Dimensions (tolerances for each dimension)

Geometric tolerances of features (datums, featurecontrol frames)

Manufacturing information (surface finish, weldingnotation)

Inspection information (key location points)

Assembly instructions

Product information (materials, suppliers, partnumbers, bill of materials, revision history)

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Integrated PMI Vision (UGS)


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What are we waiting for?Lets DO IT!!!

Benefits of 3D PMI

Enhances and shortens the design cycle Fewer errors

Streamline design/manufacturing processes

Faster change management Accelerates decision making

Remove drawings from the supplier communicationchain


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Now What?

It Sounds so familiar

Is it really worth it?

Devise new process $

Training costs - $

Educate everyone???

Downtime during the above$$$

Faster Product development

Reduced Cost

Better success rate

Reduce Engineering Change cycle time


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Justifying new Technology

Technology can bring benefit

if, and only if

it diminishes a limitation.

Long before the availability of technology,

we developed modes of behavior(policies, measurements and rules)

to help us accommodate our limitations.


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STARTING THE QUEST TO3D PMI

After being Dazzled (and dismayed)

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BRAINSTORMING


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Existing limitations

Product documentation process requires asignificant investment.

Data redundancy (in drawings)

Data inconsistencies (drawing - 3d models)

Interpretation errors (of drawings)

Time consuming change process (2D3D)


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Our Path to enlightenment

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Learn the good book

ASME Y14.41 & ASME Y14.5m)

Self paced 3D PMI TrainingI-Deas / NX

Benchmark a mini project

(~20 drawing items)

Evaluate


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The key for Success

Engineering is the backbone of the organization

If they will not like it

Nothing

Will be worthy

Direct gain to the designer

IS THE KEY

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LEARN THE GOOD BOOKASME Y14.5MASME Y14.41

Phase 1

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ASME Y14.41-2003Digital Product Definition Data Practices

ASME Y14.41 is an extension of existing ASMEstandards

Two possible modes:

3.3.1 Model Only 3.3.2 Model and Drawing

Some requirements are applicable to models ONLY

Caution!!Down stream PMI to drawings

with care!!!

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ASME Y14.41

3.3.1 Model Only:

The following paragraphs describe requirementswhen complete product definition is contained in themodel.

(a) Product definition data, including but not limited tonotes, parts lists, marking requirements,dimensions, and tolerances shall be contained orreferenced in the data set.

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3.3.1 continued

b) The data elements of a drawing format as defined in ASME Y14.1or ASME Y14.1M are not required, except for the following, whichshall be contained in the data set:

(1) name and address of the company or design activitycorresponding to the Commercial and Government Entity

(CAGE) code for the data set

(2) data set title

(3) data set number

(4) approval indicators and approval dates

(5) contract number when required

(6) originators name and date

(7) CAGE Code when required for identification of the design activity

whose data set number is used 17


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3.4.2 Management Data on a Model

(a) ASME Y14.41M Note

(b) CAD Maintained Notation

(c) Design Activity Identification

(d) Duplicate Original Notation

(e) Item Identification

(f) Metric Notation

(g) Navigation Data

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3.5.1 Location of security marking

the security data annotation plane does not rotatewith the model.

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SELF PACED 3D PMI TRAINING

Phase 2

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I-DEAS12 / NX5 3D PMI

Both packages ~comply with ASME standards

Had fun playing with new toys

Liked I-DEAS Model Views Better

(did not know about tolerance feature editor in NX)

It was not a trip through the park

Online documentation is not sufficient Training is not to be over looked!!!

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MINI PROJECT

Phase 3

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Typical Project

The initial conceptwas

The analystSuggested

Engineeringsuggested

Accepted Solutionwas

This is whatmarketing described

projectdocumentation

What was eventuallyManufactured

The customer wascharged for

By the time thesystem wasdelivered

This is what thecustomer really

wanted


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Mini project scope

Small stand alone system

Start point Paperless (models only)

Platform I-DEAS 12

Data management TDM

Technologies involved:

Flame cutting

CNC

Welding

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Designer Focal points:

Documentation effort

Time

Ease of use

Tolerating changes

Designer Benefits

Best practice

What is the stage to introduce: Datums, tolerances, welding symbols

Things change (except BORN)

Timeline25


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Production Focal Points

Documentation errors (rework)

Interpretation errors

Ease of use

Timeline

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Common workflow

Manufacturing Design 2DAssemblies & PartsFunction Form Fit

Detailed Design Sub Assemblies & Parts in 3Dassembly Context

Function Form Fit

Conceptual Design 3DAssembly

Function Form Fit

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3D PMI workflow

Manufacturing Design 3DAssemblies & PartsFunction Form Fit

Detailed Design Sub Assemblies & Parts in 3Dassembly Context

Function Form Fit

Conceptual Design 3DAssembly

Function Form Fit

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Bonus designer benefit of 3D PMI

GD&T is about Interchangeability

Working on Parts directly in the assembly allows:

The designer to concentrate on Function Form & Fit

Datum definition & order reflects design intent

A step forward to PLM Vision

A single source of truth

The whole truth

and Nothing but the Truth

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In House Road Blocks

Training

Culture impose downstream GDT without regard toassembly, Function, Form & Fit

Infrastructure (data management) communication? How do we communicate 3D models offsite?

How can I make sure the offsite supplier is on thecorrect revision?

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Software tools

3D PMI templates (not out of the box)

Notes area annotation plane not supported - Yet

ASME Y14.41 6.2.1 Notes Area Annotation Plane.

When general notes, flagnotes, and special notations are placed in a

model, they shall be placed on a single annotation plane that does notrotate with the model.

This annotation plane shall be available for display with the annotatedmodel.

PMI is not fully associative (pattern recognition)

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Suppliers / Workshop

Hardware

Paper is cheaper then a laptop

Knowhow

3D PMI Models need to be interrogated

Culture!!!

The eye is quicker then the mouse

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WRAPPING UP

Phase 4

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Production

Zero engineering rework(sure, we were careful about everything)

Interpretation:

3D models were easier to understand

GDT savvy was not resolved by 3D models

Ease of use:

CNC loved 3D PMI

Back Paper was requested

Timeline

CNC programming

Tolerances were loosened (thanks to Tolerancing in assembly context)

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Designers

Syntax checker helped eliminating common errors

Braking of old habits was not easy

Once we did:

Decreased documentation effort

We had Fewer errors

Streamline design / manufacturing processes

Faster change management

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Designer Benefits

Memory strains

Non geometric related data documentation in 3Denvironment (Threads, welding champers) made life

easier

Syntax checker

GDT in assembly context

Major decrease in Tolerancing effort

maintain focus on design intent

They liked 3D PMI

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Thats me jumping with joy


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Why Change?

Consolidating PMI data to 3D environment does:

Accelerates & improve decision making

Reduce drawing errors

Faster change management Streamline design/manufacturing processes

3D PMI Can

Enhance and shorten product cycle

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How

ASAP introduction of constraints (get item req.)

Document non geometric data as you go

(threads)

Due to software limitations(PMI is not fully associative - yet)

Stabilize design

Start Tolerancing

Hybrid has overhead on the designer & datamanagement

But has benefits down the road

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Questions?

Comments?

plm 2008 - the road to 3d pmi

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