3DCS Advanced Analyzer and Optimizer for Tolerance Analysis
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The document provides an overview of the 3DCS Variation Analyst Suites and its advanced analyzer and optimizer features, which are designed to identify and manage tolerances in engineering models. It discusses how to optimize costs while achieving desired quality through efficient data management and sensitivity analysis. Key tools include the advanced analyzer matrix and geofactor, which help ascertain the impact of tolerances on overall quality and costs.
3DCS Advanced Analyzer and Optimizer for Tolerance Analysis
- 1. Advanced Analyzer and Optimizer
- 2. Brief Company Introduction Demo: Suspension Model AAO Overview Optimizers New Developments & Closing Questions6 5 4 3 2 1 Analyzers
- 3. Quality Data Management 3DCS Suite of Products Company Overview1
- 4. 3DCS Variation Analyst Suites Multi-CAD CATIA V5 CATIA V6 Mechanical 3DCS Add-On Modules Advanced Analyzer and Optimizer FEA Compliant Modeler RTT DeltaGen Export Mechanical Modeler GeoFactor Company Overview1
- 5. It has a lot of important measurements. AAO Overview2 My model has dozens of tolerances.
- 6. What feature is my model most sensitive to? Which tolerances contribute the most? How can I save money? How do I know I’m getting the best quality for my money?
- 7. Where Do I Start?
- 8. • Quickly identifies where design is sensitive to variation • Enhanced GeoFactor results • Change individual tolerance ranges for instant results • Show GeoFactor or Percentage Contribution • Global color scaling based on adjustable sliders Advanced Analyzer Matrix
- 10. • Pp*: spec limits, no mean shift • Ppk*: spec limits, mean shift • Out%: significant out-of-spec results • Ave%: average % contribution per measurement *Process Performance, Process Performance Index • Sigma: no spec limits, no mean shift HLM Sensitivity + GeoFactor** Quantifies the effect of tolerances and assembly variation on the measures simultaneously and globally Calculates each measure separately CTI Results Identify the greatest contributing tolerance globally **Geofactor is a 3DCS Add-on often packaged with 3DCS Suites
- 12. How can I save money? How do I know I’m getting the best quality for my money?
- 14. Achieve desired quality at minimum cost Goal Value (spec lim) Max, Min, Lock, Cost Opt Meas Opt Tol Total Current Cost, Total Optimized (Minimum) Cost Input per Measure per Tolerance Optimizer Output *Assumption: larger tolerance = less cost
- 15. Measures • Goal Value: check all spec limits, default is fine Tolerances • MaxTol/MinTol – Profile, MinTol = 1.0mm – Position, MinTol = 0.5mm • Locking – Tooling (no ability to change) – Size (low influence on model) • Cost – Profile tolerance costs 20% of Position tolerance – All other tolerances equal
- 16. With Defaults With Assumptions After Max/MinTol Adjustments based on CTI results
- 17. The Update Model Tolerances button pushes OptTols back to the model Manually enter tolerances according to results O R Increases Cost Decreases Cost Remains Constant
- 19. Achieve best possible quality at a defined cost Goal Value, Weight Max, Min, Lock, Cost Total Available Budget Opt Meas Opt Tol Total Current Cost, Total Optimized (Minimum) Cost, Optimized Quality Value Input per Measure per Tolerance Optimizer Output *Assumption: Weight and Cost are relative values
- 20. Measures • Goal Value: check all spec limits, default is fine • Weight: set unimportant measures to zero Tolerances • MaxTol/MinTol – Profile, MinTol = 1.0mm – Position, MinTol = 0.5mm • Locking – Tooling (no ability to change) – Size (low influence on model) • Cost – Profile tolerance costs 20% of Position tolerance – All other tolerances equal Other • Total Available Budget: estimated cost (assume unlimited to see best quality)
- 21. With an “unlimited” Budget, best achievable quality is -0.412 @ $8276.25 Assume an Available Budget of $5000, quality is -0.586 After Max/MinTol Adjustments with $5000 Budget, quality is -0.436
- 22. The Update Model Tolerances button pushes OptTols back to the model Manually enter tolerances according to results O R Increases Cost Decreases Cost Remains Constant
Editor's Notes
- #6: Peterbuilt- where to place measures (white paper)Run results initial analysis
- #9: Compare with GeoFactor table SAME- should have the following settings:- Show Contributor Per Point- Show Factor Value with 0 Filter- Sort DescendingThen Show Contributor% SAME as GeoFactor, DIFF than sensitivity6sigma meas range on top
- #11: Measurements (and range) on topContributing Tolerances (and range) on side columnsWeight can be set to 0 to toggle that measurement “off.” The 0 weight measurement will not affect PPK, PP, OUT, or Ave.
- #15: Example: Negotiating tolerance concessions with suppliersLinear cost model
- #17: With each iteration, the total cost is minimized- your GOAL
- #18: Red/green arrows
- #20: Example: Setting quality goals for suppliers and manufacturing
- #21: (The idea here is to optimize product tolerance but keeping current overall product cost)