Working in adhesives the battery box is prime for bonding. I would bet my house that a correctly specified adhesive would be far stronger than the drop in spot welded option.
To get the idea of the difference get four post it notes - first two join them sticky but to sticky bit. Second two staple them together paper to paper (no sticky) and give them a pull.
Mini wasn’t designed for bonding but with so many seams designed for spot welding actually give sufficient areas for bonding. Also plus point for bonding is that the area is protected from any moisture getting in between the seam as we all know is the issue for rust monster.
Battery Box
Started by
Cooperman
, Apr 15 2021 10:54 PM
21 replies to this topic
#17
sonscar
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Up Into Fourth
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Posted 18 April 2021 - 07:08 AM
Go for it,If it were not so expensive I would.Steve..
#18
steeley
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Super Mini Mad
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Posted 18 April 2021 - 07:09 AM
Working in adhesives the battery box is prime for bonding. I would bet my house that a correctly specified adhesive would be far stronger than the drop in spot welded option.
To get the idea of the difference get four post it notes - first two join them sticky but to sticky bit. Second two staple them together paper to paper (no sticky) and give them a pull.
Mini wasn’t designed for bonding but with so many seams designed for spot welding actually give sufficient areas for bonding. Also plus point for bonding is that the area is protected from any moisture getting in between the seam as we all know is the issue for rust monster.
Mini wasn’t originally bonded together as back it the day I wouldn’t have thought any adhesives existed to do
The job
Fully bonding the box in would give a bonding area of about 1000mm2 as opposed to say 10 spot welds
giving a bonding area of about 250mm2 I know what I’d be doing
#19
E23TFD
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Mini Mad
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Posted 18 April 2021 - 07:41 AM
Mini wasn’t originally bonded together as back it the day I wouldn’t have thought any adhesives existed to do
Mini wasn’t designed for bonding but with so many seams designed for spot welding actually give sufficient areas for bonding. Also plus point for bonding is that the area is protected from any moisture getting in between the seam as we all know is the issue for rust monster.
The job
Fully bonding the box in would give a bonding area of about 1000mm2 as opposed to say 10 spot welds
giving a bonding area of about 250mm2 I know what I’d be doing
Exactly, adhesives work on area. So take for instance a PU based product is 2/3 N/mm2 and moving up to low range structural products at 30N/mm2 suddenly you see the strength gained. We have to factor in not only strength though but some flexibility is needed as there will be flex as we have all stated not designed to be bonded but this is an easy one for sure
#20
E23TFD
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#21
Cooperman
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Posted 18 April 2021 - 08:24 PM
Other areas for structural bonding are door skins to door frames, boot lid skin to frame.
#22
MiNiKiN
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Posted 21 April 2021 - 06:42 AM
If you intend to bon, just make sure you use the right adhesive of the many available.
From professional bad experience: A supplier used adhesive to bond sliding plates within airsprings (for rolling stock). Turns out adhesive wasn't up for the job.
Took us (customer and supplier) ages of research and testing to find and approve the right adhesive and method of application.
Edited by MiNiKiN, 21 April 2021 - 06:44 AM.
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