tolerance and stack analysis manual and advance … and stack analysis manual and advance approach...
TRANSCRIPT
Tolerance and Stack Analysis
Manual and Advance approach
Author
Waqas Amjad
S167777
Supervisor
Prof. Stefano Tornincasa
DIGEP -Dipartimento di Ingegneria Gestionale e della Produzione
I FACOLTA' DI INGEGNERIA
DEPARTMENT OF MECHANICAL ENGINEERING
September 2012
TOLERANCE & STACKUP ANALYSIS
MANUAL AND ADVANCE APPROACH
Waqas Amjad
TITLE OF THESIS:
PROF. STEFANO TORNINCASA DIGEP -DIPARTIMENTO DI INGEGNERIA GESTIONALE E DELLA
PRODUZIONE I FACOLTA' DI INGEGNERIA
Waqas Amjad
SUPERVISOR
Thesis Orientation
Introduction & Objective
Manual Approach
Advance Approach CAT systems
CAT system Characteristics
CASE STUDY
Thesis Orientation
Introduction & Objective Manual Approach
Advance Approach CAT systems
CAT system Characteristics
CASE STUDY
PRODUCTION PROCESS
CONCEPTUAL
DESIGN
DETAILED
DESIGN
EMBEDED
DESIGN
TOLERANCING
PROCESS
Introduction
TOLERANCING PROCESS
TOL.
SPECIFICATION
TOLERANCE
SYNTHESIS
TOL.
ANALYSIS
TOLERANCE
VERIFICATION
Introduction
Statement of the Problem
Whether A Collection Of
Parts Would Fit Together
Before They Were
Manufactured????
By performing
Tolerance analysis &
Tolerance stackups
Part1:
Manual Models for Stackup Analysis
Part 2:
Search of CAT systems
Part 3:
Compare Characteristics
Objective
Thesis Orientation
Introduction & Objective
Manual Approach Advance Approach CAT systems
CAT system Characteristics
CASE STUDY
Manual Approach
Setup Datums
Schematics for blueprint dimension
Prepare Tolerance Chart
Balance dimensions & Mean dimensions
Mathematical Models for Stackup Analysis
Case Study
Setup Datums
Schematics for blueprint dimension
Prepare Tolerance Chart
Models for Stackup Assemblies
"+" Tolerance "-" Tolerance ± Tolerance RMS
A B C D E
1 15 0.5 0.25
2 15 0.5 0.25
3 20 0.5 0.25
4 25 0.5 0.25
5 10 0.5 0.25
6 100
100 85 2.5 Total 1.25
Nominal Value 15
Max Gap 17.5
Min Gap 12.5
RSS Max 16.25
RSS Min 13.75
Case Study Manual Results
Thesis Orientation
Introduction & Objective
Manual Approach
Advance Approach CAT systems CAT system Characteristics
CASE STUDY
Advance Approach using Current status of CAT systems
SIGMUND WORKS
SolidWorks Integration
SIGMUND ABA
DCS
DCS-Datum Flow Chain
CETOL 6
GD&T Advisor
TolAnalyst
TolMate
Vis VSA
And many more
Case Study SolidWorks Results
Study Name Study1
Analysis Parameters
Orientation tolerances ON
Normal to origin feature YES
Float fasteners and pins ON
TolAnalyst Measurement (mm)
Nominal Value 15
Minimum Value 12.5
Maximum Value 17.5
RSS Minimum 14.038
RSS Maximum 15.957
Conclusion of Case Study
SolidWorks
Nominal Value=15
Minimum Value=12.5
Maximum Value=17.5
RSS Minimum=14.038
RSS Maximum=15.957
Manual Calculation
Nominal Value=15
Minimum Value=12.5
Maximum Value=17.5
RSS Minimum=13.75
RSS Maximum=16.25
There is difference in calculation due to the effect of max-min contributors which effect the stackup tolerance and Assembly constrains assumed which have major role in defining the checks on Assembly floor.
NEW WORK
QUESTIONS?