Circle Grid Analysis

In this workshop you will learn how to perform and interpret circle grid and thinning strain analysis. Through exercises with actual parts you will be performing hands-on circle grid and thinning measurements. You will review the limitations and guidelines for the use of circle grid and thinning measurements. Also included is the measurement and application of surface stretch analysis for outer panels. 

Course Outline 

1.0 Overview of Thinning Strain and Circle Grid Analysis 
1.1 Understanding Thinning Strain and Circle Grid Analysis 
1.2 Applications of Thinning Strain and Circle Grid Analysis  
1.3 What is the Difference Between Thinning Strain Analysis and Circle Grid Analysis  
1.4 Procedure for Thinning Strain and Circle Grid Analysis 
1.5 Other Uses for Thinning Strain and Circle Grid Analysis 

2.0 Fundamental of Thinning Strain Analysis (TSA)

2.1 Establishing the Thinning Limit
2.2 Thinning Strain
2.3 Calculating Thinning Strain
Exercise: Calculate Thinning Strain 
2.4 Measuring Thickness
2.5 Finding ‘Hot Spots’
2.6 Highlighting Areas for Circle Grid Analysis

3.0 Fundamental of Circle Grid Analysis
3.1 Types of Circle Grids
3.2 Methods for Applying Circle Grids
3.3 Major Strain and Minor Strain
Exercise: Calculating Major and Minor Strain
3.4 Measuring Circles
Exercise: Measuring Major and Minor Strain with Mylar
3.5 Recording and Plotting Measured Data
3.6 Introduction to Forming Limit Diagrams

4.0 Forming Limit Diagrams 
4.1 Why do we use Forming Limit Diagrams? 
4.2 Shape and Position of Steel Forming Limit Curves 
Exercise: Finding FLD0 by the Table Method and Calculation Method 
4.3 Shape and Position of Aluminum Forming Limit Curves 
4.4 Safety Margin 

Surface Stretch Analysis 
5.1 Where to use Surface Stretch Analysis  
5.2 Target Strain 
5.3 Dent Resistance 
5.4 Stiffness 

6.0 Results 
6.1 Interpretations of Results 
6.2 Limitations of TSA, CGA and Surface Stretch Analysis
6.3 Sample Report
6.4 Corrective Action 

Who should attend?
Tooling Supervisors, Tooling and Quality Engineers, and Tool and Die Makers.