Rivet heads poopoin off etc

[16161616]

1. Closed End Rivet Dome heads popping off during vibration test. This was unexpected and is there any
setting on the pneumatic rivet guns to lower the preload/prestress in heads?

2. Are there rivets/fasteners that can be installed from thicker side of the casting to hold a thinner plate to allow ease of assembly?

Thanks

 

[Kwan]

What kind of rivets are these. Size and material.

 

[16161616]

3/16" AD66h from emhart, hole size 5.75 on the casting, 6.5
on the stamping. hole size 5.0 tried out with no luck.

 

[16161616]

Additionally, steel mandrel + Al body, DOmed head

Hole is angular

1/4" rivets too strong as they end up breaking the stamping

Not sure yet if the testing is severe.

Any idea if countersunk heads work better?

 

[CoryPad]

Rivets like these are sensitive to hole size. The body diameter of the rivet is 4.8 mm, and is supposed to be used in a 4.9 mm diameter hole. You will have very poor joint performance if the hole diameter is much larger than 4.9 mm.

Regards,

Cory

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