Getting to the end game with QIF: Useable Parts...Cpk Ppk • Engineering shorthand is not machine...
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Getting to the end game with QIF: Useable Parts Mark Nielsen TechAzul 310 - 729 - 6275 [email protected]
Transcript of Getting to the end game with QIF: Useable Parts...Cpk Ppk • Engineering shorthand is not machine...
Getting to the end game with QIF: Useable Parts
Mark Nielsen
TechAzul
310-729-6275
• Founder TechAzul
• Masters of Science in Mechanical Engineering, University of California, Berkeley
• Bachelors of Science in Mechanical Engineering, University of California, Berkeley
• Registered Professional Mechanical Engineer in California 20 + years
• 25 years with PTCo rasna: Application Engineer for Structural Analysiso PTC: Application Engineer for all CAD/CAM applicationso PTC: Liaison with R&D for field engineeringo PTC: Subject Matter Expert: Model Based Definition (MBD) since 2002
• Assisted over 60 companies with MBD in a variety of industrieso Aerospaceo Medicalo Industrialo Commercial
• Standards & Industry Committee Participationo ASME – American society of Mechanical Engineers 14.24 14.41 14.46 14.47o DMSC – Dimensional Metrology Standards Consortiumo NIST – National Institute of Standards and Technology
Mark Nielsen
Drawings to MBD Evolution:
2130 BC
First recognizedtechnical drawing
1765
OrthographicProjection
Protocol
1901
DraftingMachine
1963
2D CADSKETCHPAD
1968
3D CADUNISURF
Model Based Enterprise – An EvolutionCommon terminology for logical progression from fully drawing-based to a fully model-based enterprise
2D Master Drawing – 3D model not verified or configuration controlled
2D Master Drawing w/ associative 3D model (Model is verified and configuration controlled)
Drawing Centric
Model Centric
1.
2.
3D Master CAD Model with 3D annotations 2D drawings by exception
3D Master CAD Model with 3D annotations Fully leveraged by the Enterprise
Model Based Definition
Model Based Enterprise
3.
4.
Why do we design?
Getting to the end game: Useable Parts
ManufactureDesign Inspect
The process to get to useable parts is complex
Design Manufacture Inspect
Drawing Centric
Model Centric
Model Based Definition
Model Based Enterprise4.
Manual Machining
CNC: Computer Numerical Control
Feature based machining
Toolpath Strategies
Manual Gauging
CMM: Coordinate Measurement Machines
Non-contact Scanners
Focus has been Derivative models
Design Manufacture Inspect
CAD STEP
QIFParasolid ACIS
FAI.xls
STEPFor Inspection
QIF
is a key enabler
Comparative Validation
The process to get to useable parts is complex
Inspect
Manual Gauging
CMM: Coordinate Measurement Machines
Non-contact Scanners
Issues with current Computer Aided Inspection Process• Import geometry only• Must re-enter ALL the PMI into inspection
software• Datums – refer to feature of size• Geometric Characteristics manually associated
to surfaces• Dimensions manually associated to surface
extents
• Resolve GD&T conflicts & inaccuracies• Section views are not beneficial other than
visualization • Measurement plan is often very ad-hoc• Machine and Personnel dependent
• Understand the implications of the tolerances defined on the model
• Assess dimensions with the inspection capabilities of in-house & supplier machines
• Understand and associate the costs to the tolerance values.o Measurement uncertainty
o Based on the dimension
o Density of sampling points
o Quality of CMM (accuracy, repeatability)
o Probe type
o Environmental conditions (temperature)
Need to understand Inspection Process Capabilities
QIF Application Areas
Rules: Create measurement templates—e.g.: If
a Surface Profile tolerance value is less than x, use at least y number of points/sq. in. for CMM measurement
QIF Application Areas
MBD is the base for providing traceability
to authority CAD data. It is not required for basic QIF use cases. Considered to be the strongest semantic CAD+PMI standard available
Resources: Specify basic or highly
detailed information about available measurement equipment (e.g., CMMs, probes, calipers, gages, etc.). As always, this data is contextual and semantic
Plans Wide range of optional levels of
detail for measurement plans:• Bill of characteristics• Assign measurement resources• Specify sampling point locations
DMIS is not part of QIF, but it has been
updated to harmonize with the data traceability mechanisms in QIF
Results: Measurement results data,
associated with the MBD! This can be just tolerance evaluation results, and can even include all the point cloud data from the features
Statistics: Reference a bundle of QIF
Results sets and specify a statistical analysis method to be carried out. Can optionally include the results of the statistical analysis as well
1. PMI2. QPIDs3. Key Chars4. Criticalities5. Criticality Area
Creo Parametric
PTC
MBDVidia
Capvidia
Pundit CMM
Metrosage
CMM A
CMM B
CMM C
scanner
CheckMate
Origin Intl
CMM driver software
Probe DataPt collections
QIF file
1. MBD QPIDsQIF file
1. MBD
2. BoC
QIF file
1. MBD
2. BoC
3. CMM
4. Meas Plan
QIF file
1. MBD
2. BoC
3. CMM
4. Meas Plan
5. Results
QIF file
1. MBD
2. BoC
3. CMM
4. Meas Plan
5. Rules
6. Results
7. Analytics
DMIS file
1. Probes
2. Locations
control
CAD MBDPMI
Bill of
Characteristics
Measurement
Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
Inspection ready MBD model in Creo Parametric
MBD Ready Check
• Annotations properly associated to surfaces
• No duplicate dimensions
• Patterned features associated
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
• Engineering shorthand is not machine readableo Unless otherwise specifiedo 4Xo TYPo Break all edges
• Check for improper associationso Dimensions to edgeso Dimension of silhouette edgeso Dimensions to tangents
• Rounds and filletso Associated to edge sets
• Dimensionso No duplicate dimensionso No Over-write dimensions
Engineering shorthand must be elaborated
Export QIF model from Creo Parametric
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
QIF Export
• All Creo MBD Features & PMI
• Combined States
• Ontology of Tolerance Features
Tolerance Features & Characteristics
Tolerance Features
Characteristics
Plane Feature
Cylinder Feature
Parallel Planes Feature
Diameter Characteristic
Width Characteristic
Position Characteristic
Perpendicularity Characteristic Flatness
Characteristic
Datum A
Perpendicularity Characteristic
• CAD geometry is wrapped by Features• Different from CAD features• Sometimes referred to as:
• Tolerance Features• Metrology Features• Measurement Features
Fundamental constructs of QIF: Tolerance Features & Characteristics
• Features referenced by Characteristics• Usually, these are GD&T• Eg position or perpendicularity
Bill of characteristics for First Article Inspection
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
Bill of Characteristics
• All Inspection Features Ballooned• Dimensions• Notes• Symbols
• Machine Readable Semantic Representation
Bill of characteristics for First Article Inspection
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
Bill of Characteristics
• Specify enumeration for each instance
• Instances defined for machine
• Instances displayed for presentation
Pick CMM & determine optimal sampling point locations
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
Measurement Uncertainty controls measurement process
Tolerance Zone
0
• Common practice to review uncertainty ratio
• 10:1 ratio bandwidth (good)
• 4:1 ratio (uses 25% of band)
10%
25%
60%
ISO 10360 Performance tests & factors for CMMs
Simulation calculates measurement uncertainties
Understand & Control Risk
• Based on specific machine capabilities
• Monte Carlo Simulation
• Estimate of CMM error uncertainty
Automatically Generate Inspection Toolpath for CMM
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
Resulting Point cloud analyzed for results Calculation
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
Creo Parametric session linked with QIF results
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
List of individual inspection results
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
QIF results resolved to Cpk
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
Video: Automatic optimized CMM inspection
Get to Useable parts faster with Inspection Automation
Data Traceability
Automation & Optimization
CADMBD & PMI
Bill of
Characteristics
Measurement Plan
Optimized
Inspection
Execution
Inspection Results
AnalyticsCpk Ppk
Fast Forward to useable parts
MBD can do it, are you ready?
