DC Motor Magnet Adhesive
DC Motor Magnet Adhesive
(OP)
I am currently using a DC motor and the vendor has informed me that they will be changing the adhesive to bond the magnets to DC motor shell. I want to generate a Validation plan for this change. Anyone have suggestions on applicable tests. I was thing along lines of Life testing in operation, Vibration. Any other suggestion would be greatly appreciated.
Thanks.
Thanks.





RE: DC Motor Magnet Adhesive
RE: DC Motor Magnet Adhesive
Best regards,
RE: DC Motor Magnet Adhesive
RE: DC Motor Magnet Adhesive
RE: DC Motor Magnet Adhesive
RE: DC Motor Magnet Adhesive
We have bonded magnets to steel shells and flux rings for 20+ years and have seen the total gamut of failures. From my experience, surface preparation is essential. I have seen absolutely 'clean' shells have two stage epoxy bonded magnets literally fall out from their own weight.
We 'drop test' a significant lot (30 pcs) to validate a new run of material and check for good squeeze, cure, and adhesion and also continuously monitor the bonding stations (6 per shift) as the adhesion process can be easily affected by environmental conditions. We have vibration tested product in the past at resonance for 30 hrs, but felt that the drop test was sufficient as the bond is typically very stable.
We also will validate the material with a salt chamber test to ensure that there are no voids between the shell & magnet interface.
Hope this helps.
RE: DC Motor Magnet Adhesive
RE: DC Motor Magnet Adhesive
RE: DC Motor Magnet Adhesive
2-part acrylic
cyanoacrylate
eg see "plastic bonding LTS june 2003.pub"
https://www.permabond.com/
(go to FAQs then search on "plastic")
RE: DC Motor Magnet Adhesive
RE: DC Motor Magnet Adhesive
RE: DC Motor Magnet Adhesive
SALT water spray to test sea water endurance-- usually warm.
<nbucska@pcperipherals.com>
RE: DC Motor Magnet Adhesive
Hope this helps.
Cheers and a Happy New Year to all!
RE: DC Motor Magnet Adhesive
I haven't come across an 'Angstrom machine' - could this be an 'Instron' machine used for stress testing of materials? Not my area of expertise, but I remember the materials labs at BAe were full of these units.
http://www.instron.com/index.asp
RE: DC Motor Magnet Adhesive
http://www.satcon.com/pdf/47000rpm.pdf
for more info including an option to the adhesive approach.
RE: DC Motor Magnet Adhesive
RE: DC Motor Magnet Adhesive
I stand corrected. I realized my spelling error after I posted my reply but did not correct it.
Cheers..
RE: DC Motor Magnet Adhesive