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3DCS Advanced Tolerance Analysis - 5 Additional Analyzers and Optimizers

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Five Tolerance Analysis Tools in One

3DCS Advanced Analyzer and Optimizer (AAO) contains five tools for 3DCS Variation Analyst, expanding its capabilities. These include:

1. Advanced Analyzer
2. Critical Tolerance Identifier
3. Tolerance Optimizer
4. Locator Sensitivity Analyzer
5. Simulation-Based Sensitivity

Why Use Advanced Analyzer and Optimizer?

3DCS Advanced Analyzer and Optimizer Add-on Module

-->You have large models with a lot of measurements or tolerances
--> You want to know which part in the assembly is causing the most variation
--> You have non-linear relationships in your model
--> You want to optimize your tolerances quickly
--> You want to know which measurements should be measured in production
--> You want to check your locators or test different locating strategies
--> You want to do What If studies on different tolerances across the model

Find out more at: http://www.3dcs.com/tolerance-analysis-software-and-spc-systems/add-ons/3dcs-advanced-analyzer-optimizer

Publié dans : Ingénierie
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3DCS Advanced Tolerance Analysis - 5 Additional Analyzers and Optimizers

  1. 1. Dimensional Control Systems | 2017 All Rights Reserved 3DCS Advanced Analyzer and Optimizer Add-on Use advanced analyzers to view work with large models and optimizers to reduce your work load
  2. 2. Dimensional Control Systems | 2017 All Rights Reserved What is AAO? 5 Tools in One 1.Advanced Analyzer 2.Critical Tolerance Identifier 3.Tolerance Optimizer 4.Cost Optimizer 5.Locator Sensitivity Analyzer
  3. 3. Dimensional Control Systems | 2017 All Rights Reserved You have a large model with a lot of measurements or tolerances You want to know which part in the assembly is causing the most variation You want to optimize your tolerances quickly You want to know which measurements should be measured in production You want to check your locators or test different locating strategies You want to do What If studies on different tolerances across the model Why Use AAO?
  4. 4. Dimensional Control Systems | 2017 All Rights Reserved ADVANCED ANALYZERS Get a system level view of your model
  5. 5. Dimensional Control Systems | 2017 All Rights Reserved Where is My Product Most Sensitive? Advanced Analyzer Matrix • Based on GeoFactor Analysis • Six Methods of Combining Contributors
  6. 6. Dimensional Control Systems | 2017 All Rights Reserved Advanced Analyzer Matrix • 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
  7. 7. Dimensional Control Systems | 2017 All Rights Reserved What If Studies • Change tolerances within the matrix • Receive instant results • Test different What If scenarios • Only update the model when you want to • Customize color code for pass/fail
  8. 8. Dimensional Control Systems | 2017 All Rights Reserved Critical Part Identifier • Show contributors per part – All contributors and all features on a part – Which part is giving me the highest contribution overall to my system (product) variation
  9. 9. Dimensional Control Systems | 2017 All Rights Reserved GeoFactor Inside AAO • The GeoFactor Table is accessible from the matrix
  10. 10. Dimensional Control Systems | 2017 All Rights Reserved GeoFactor Mean Shift Table Ranks affect of Tolerance Offsets
  11. 11. Dimensional Control Systems | 2017 All Rights Reserved Geofactor Mean Shift Table • Give users an idea of where mean shifts are coming from. • Only analyzes off sets placed in tolerances. • Many other contributors not included, so does not get used too much. • Value: Quickly comprehend mean shifts in your system • We focus on analyzing variation, mean shift is just as important. • See shifted tolerances and how it affects your measurements. • In production, Mean Shift is what you are looking for. Is the sign of an issue in manufacturing.
  12. 12. Dimensional Control Systems | 2017 All Rights Reserved Which Tolerance Contributes the Most Variation Critical Tolerance Identifier
  13. 13. Dimensional Control Systems | 2017 All Rights Reserved Critical Tolerance Identifier GeoFactor Alone • 1 measurement at a time • Small scale • Cannot set spec limits • Does not show mean shift AAO (includes GeoFactor Function) • All measurements in matrix • Large scale • Set spec limits and make changes • Mean Shift analyzer Identify the greatest contributing tolerance globally
  14. 14. Dimensional Control Systems | 2017 All Rights Reserved Critical Tolerance Identifier • Pp*: weighted by spec limits, no mean shift • Ppk*: weighted by spec limits and mean shift • Out%: weighted by out-of-spec results • Ave%: average % contribution per measurement *Process Performance or Process Performance Index Quantifies the effect of each tolerance (or hole-pin float) on the measures simultaneously and globally
  15. 15. Dimensional Control Systems | 2017 All Rights Reserved Tolerance Contributing the Most Variation
  16. 16. Dimensional Control Systems | 2017 All Rights Reserved OPTIMIZERS Increase quality while decreasing cost
  17. 17. Dimensional Control Systems | 2017 All Rights Reserved Increase Tolerances to Save Money (6tk)2 Costk (6tkmin)2 (6tkmax)2 Costkmin Costkmax cck = (Costkmax - Costkmin) / [(6tkmax)2 - (6tkmin)2 ] Tolerance Optimizer
  18. 18. Dimensional Control Systems | 2017 All Rights Reserved Tolerance Optimizer: Cost • Combination of tolerances that can meet set goals. • Set adjustment amounts to limit tolerance changes • The software adjusts tolerances (goal is to open up, not tighten, to reduce costs overall) in order to meet given goal values. • Initial goals are taken from the spec limit • Weighed value – max will be 0, and min tol will be given ‘cost’
  19. 19. Dimensional Control Systems | 2017 All Rights Reserved Tolerance Optimizer: Cost 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
  20. 20. Dimensional Control Systems | 2017 All Rights Reserved Optimizer Assumptions 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
  21. 21. Dimensional Control Systems | 2017 All Rights Reserved Determine Optimum Tolerances With Defaults With Assumptions After Max/MinTol Adjustments based on CTI results
  22. 22. Dimensional Control Systems | 2017 All Rights Reserved Update the Model Only When You Want To Manually enter tolerances according to results Increases Cost Decreases Cost Remains Constant The Update Model Tolerances button pushes OptTols back to the model OR
  23. 23. Dimensional Control Systems | 2017 All Rights Reserved Tolerance Quality Optimizer 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
  24. 24. Dimensional Control Systems | 2017 All Rights Reserved Tolerance Optimizer Quality
  25. 25. Dimensional Control Systems | 2017 All Rights Reserved Quality Optimization Assumptions 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)
  26. 26. Dimensional Control Systems | 2017 All Rights Reserved Determine Optimum Quality 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
  27. 27. Dimensional Control Systems | 2017 All Rights Reserved Push Button Update to Model The Update Model Tolerances button pushes OptTols back to the model Manually enter tolerances according to results Increases Cost Decreases Cost Remains Constant OR
  28. 28. Dimensional Control Systems | 2017 All Rights Reserved LOCATOR SENSITIVITY ANALYZER Find which move is causing the most variation (Assembly Analysis)
  29. 29. Dimensional Control Systems | 2017 All Rights Reserved Analyze the Sensitivity of Locating Features Does the variation get better or worse if I make my locator tighter? Which Locating Method provides the least amount of added variation to my product? Which move is most critical to my overall assembly? Model multiple location methods and test each one Analyze in advance, what if we modify our locators? Spread them out, move an individual locator?
  30. 30. Dimensional Control Systems | 2017 All Rights Reserved Test Fixtures for Variation Three different locating methods Representing possible tooling or fixtures Simulating a tool, understand the multiple different geometric effects based on changing my locators
  31. 31. Dimensional Control Systems | 2017 All Rights Reserved Calculate the Variation LSA moves all the target positions and points independently based on locator tolerances (set here at 0.50 and then checks the entire geometry of the part for its maximum variation
  32. 32. Dimensional Control Systems | 2017 All Rights Reserved Color Mapping Isolate and view specific sources of variation • Focus on one part or the entire assembly • View geometric effects based on changing location
  33. 33. Dimensional Control Systems | 2017 All Rights Reserved Compare Visually see the variation between different locator strategies
  34. 34. Dimensional Control Systems | 2017 All Rights Reserved Advanced Analysis Tool Analyzing the sensitivity of the locating features Focus on one part: View geometric effects based on changing location
  35. 35. Dimensional Control Systems | 2017 All Rights Reserved Which Locator or Direction is Most Sensitive • LSA can be set to one direction of variation (X, Y or Z, or all three) • If set to XYZ, it will show only one number, the Root Sum Squared of X, Y and Z variation combined.

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