Autoliv Cushion Fold Measuring Fixtures and Tools
Team: Jacob Livingston, Jessica Anaya, Zach Valliere
Sponsor: Autoliv
Project Overview
Clocking
- External Measurement
- Measure of how rolled the bag is within the module
Plus One Position
- External Measurement
- Measure of where plus one fold is located within the module
Plus One Size
- Internal Measurement
- Requires module disassembly
- Measure of how much fabric exists between inflator and plus one fold
Our Solutions
FTF
- Measures Clocking
- Replaces Datum with something more rigid and defined.
- Designed to work with many different module sizes
PMF
- Measures Clocking
- Reduces uncertainty for profile measurements
- Simple design is easy to use, and easily adaptable
And Others
Performance Review
FTF
| Requirements/Constraint | Target | Threshold | Predicted Performance | Actual Perfomance |
|---|---|---|---|---|
| Able to Measure Key Features | NA | NA | NA | NA |
| Total Gage R&R (%) | 10 | 30 | 19.6 - 24.6 | 72.2 - 85.5 |
| Time Required to Complete All Measurements (min) | 3 | 5 | 3 | 5.5 |
| Time Required to Learn fixture/method (min) | 5 | 10 | 5 | 4 |
| Total Volume (cm^3) | 200 | 300 | 275 | 210.4 |
| User Interactions with module | 0 | 1 | 0 | 0 |
PMF
| Requirements/Constraint | Target | Threshold | Predicted Performance | Actual Perfomance |
|---|---|---|---|---|
| Able to Measure Key Features | NA | NA | NA | NA |
| Total Gage R&R (%) | 10 | 30 | 56.1 - 67.1 | 25.29 - 60.53 |
| Time Required to Complete All Measurements (min) | 3 | 5 | 4 | 2.3 |
| Time Required to Learn fixture/method (min) | 5 | 1 | 5 | 3 |
| Total Volume (cm^3) | 200 | 300 | 150 | 299.2 |
| User Interactions with module | 0 | 1 | 0 | 0 |
Conclusion
More Testing
Moving Forward
Recommendations:
- Clocking: Profile Measurement Fixture
- Plus one size and position: Stencils + PMF
Profile Measurement Fixture:
- Adjustable/replaceable pins for better locating
- Adjustable fixture height to work with multiple modules
- Replace tightening screws with something quicker.
Flex Tape Fixture:
- More robust screws/inserts
- Minimize slipping with tighter fits
- Rework how device interacts with module to fit with module hooks