Dimensional Variation Analysis

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Presentation transcript:

Dimensional Variation Analysis

Dimensional Variation Analysis (DVA) Mission A Group Dedicated to Deploying Advanced Processes and Tools in Statistical Tolerance Analysis for Improved Reliability, Cycle Time, Comparative Advantage, and ROE. Interviewed Several Engineering Leaders & Designers: - No Time - Stack-ups done on AS NEEDED BASIS -> $$$$$$$$$$ - Communication Issues Between Entities - Want Training, TOOLS & SUPPORT

4 Tier Approach Tier 1; Nom. Clearances & Worst Case (WC) Analysis & Tier 2; Modified WC and RSS Statistical Analysis # Tolerances Assembly Tolerance W/C Reality RSS Increasing Firepower Tier 3; Monte Carlo Simulation using @Risk & Tier 4; VSA/PRO-E 3-D Variation Simulation

Greg Steinrock & Mike Baker DVA Team Concept AHD Engineering Leader PDE Engineering Leader Signature Engineering Leader DVA Team Greg Steinrock & Mike Baker Class II Engineering Leader Class I Engineering Leader CEP Engineering Leader CTC Engineering Leader JEP Engineering Leader

Standard Graphical User Interface

Potentially Saved 4.20 RPH & $8.12 CPE!! Angular Misalignment (Degrees) CPK= 1.0 Angular Misalignment (Degrees) CPK= 1.67 Tornado Diagram For Tolerance Allocation Potentially Saved 4.20 RPH & $8.12 CPE!! Piston Rod Interference at Kreystone Angle Liner Block Interference Piston Cooling Nozzle Clearance Fuel Pump Gear Clearance

Design “No Fly Zone” Fuel Pump DVA Results DVA Simulation Geometry, GD&T... Assembly, FEA, Wear ... DVA Results End Clearance Radial Clearance Design “No Fly Zone” DVA Simulation Add Structural Effects Nominal Shift ROBUST FINAL DESIGN Add Thermal Effects Dimensional Variation Add Wear Effects --> Net Cumulative Distribution Tolerance Reallocation Gear Design Change

Hydraulic Control Valve Solenoid Spacer

Questions?