1. Centering Magnet Device P08028
A.Burger
J. Lu
D. Falcinelli
M. Brown

2. Order of Presentation
1.) Introduction of existing device 2.) Problems with the existing device 3.) Customer's Needs 4.) Break-up device into sub-assemblies 5.) In depth details of sub-assemblies 6.) Different combinations of different sub-assemblies 7.) Design concept decided on

3. Introduction of Existing Device

4. Step 1.

5. Bushing and Magnet holding Fixture

6. Dial Indicators used to measure the magnet and bushing position

7. A closer look at the positioning process

8. Magnet mapping sensors and pusher assembly

9. Hall Effect Sensors

10. Physical device used to push the magnet

11. Process of Mapping and Pushing the Magnet
Aligning linear stages
Determining the position of the bushing and magnet using the dial indicators
Rotating the entire assembly and mapping the magnetic field
Calculating the max and min of the magnetic field and determine the location of the maximum value
Rotating the magnet and bushing assembly to the maximum location
Move assembly to the pushing device where it moves the magnet
This process is repeated until the magnetic field and bushing are concentric to 20 microns

12. Issues with this process
Manual process involved
Physically measuring the position of parts
Human error
Indicator being destroyed
Holding magnet and bushing
Pushing the magnet
Moving parts

13. Customer Need’s

15. Sub Assemblies Assemblies Orientation Physically holding parts
Measuring parts
Mapping magnetic field
Centering magnet
Adhering magnet to bushing
Confirming and validating

16. Assembly Orientation
Vertical or horizontal

17. Holding Fixture: Pugh Chart

18. Holding Component
Post
Chuck
Combination of both

19. Measuring and mapping parts
Hall effect sensors will measure the magnetic fields, choices to be decides from are:
A single sensor which moves
An array of sensors
The position of the bushings:
Will not involve a human operator
Will not touch the components

20. Centering Magnets Option 1 Option 2 Option 3 Option 4
Having the entire bushing/magnet assembly move towards a physical device like the existing device
Option 2
Move a physical device towards the bushing/magnet assembly
Option 3
A bushing which is stationary and a bushing that moves
Option 4
A magnet which is stationary and a bushing that moves

21. Adhering Automated gluing Heat activated composites UV activated
Ultra sonic
Applying a pressure to the centered assembly then gluing
This sub assembly will be determined once the holding and centering of magnet are chosen

22. Design concept decided on
The magnet/bushing assembly will be vertical
An array of Hall Effect sensors will be implemented
Option 4: having the magnet stationary while moving the bushing

23. Why this configuration
Vertical eliminates gravity
No gravity eliminates forces
An array eliminates a moving element
The magnetic field be the reference point
Magnet centers change from magnet to magnet, bushings do not

24. Different configurations
Magnet above bushing
Magnet below bushing
Bushing is placed on magnet, manually

25. Magnet held in place on top

26. Magnet held in place on bottom