Rivet length

[jcastaneda79]

Hi Everyone, does anyone know how to calculate the length of a rivet? This rivet will be process with orbital pinning. Thanks

 

[racookpe1978]

What kind of head? How are you compressing/squishing the rivet head? One side access or two sided?

What thickness material? What meterials are you fastening?

What budget do you have, and how many dozen/hundred/thousand/million rivets do you need to fasten?

Shop or field?

 

[hydtools]

Here is a reference from Orbitform as a starting point:

http://www.orbitform.com/modules.php?name=Pages&sp_id=163

Ted

 

[hydtools]

Here is an aircraft reference for rivet length:

http://books.google.com/books?id=a3...X&oi=book_result&resnum=8&ct=result#PPA104,M1

Ted

 

[jcastaneda79]

We are using orbital forming to secure a baffle to a cam cover by using aluminum rivets. We are fastening only from the upper side.

This looks like the machine we are using:

http://www.baltecorporation.com/about_radial.html

We are riveting at 14 places

We need to have a 6.30 and 7.30(both are min) diameter after riveting. Current diameter before riveting is 5.0 mm for the 6.30 and 6.0mm for the 7.30. I am having problems after the riveting operation, some of the rivets are breaking.

 

[hydtools]

According to the Orbitform reference your 'h' length should be .5*d; 1/2 half the rivet diameter. The other reference recommends 1.5 times the rivet diameter for your length 'h'.
If you are forming the rivet to a sharp edge, I would suspect you are forming too little material too far and the sharp edge is cracking.
What is the length you are using before forming?

Ted

 

[jcastaneda79]

The length of the rivet is 3.4 mm, measured from the base to the top of the rivet.

 

[hydtools]

What is the grip length?

Ted

 

[jcastaneda79]

what is the grip length?

 

[vesselfab]

Grip length is the finished thickness of the metals being riveted.

say.....10 gauge (.1345) to 16 ga (.0598) = 0.1943" grip length


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