Tubular vs Semi-Tubular Rivets 1

[swertel]

A coworker and I are trying to find the difference between tubular and semi-tubular rivets. We even looked up ASME B18.7 and the definitions of each do not clarify anything.

Also, is there a list of standard diameters and lengths of rivets?

Finally, is there a good reference book, similar to Bickford's and Nassar's Handbook of Bolts and Bolted Joints, for rivets? I'm looking for specific information, in addition to using standard mechanics of materials calcs, to know how much the rivet could hold in tension (a bending load that may cause the head to pop off or the sheet metal to peel around it) as well as the force needed to swage/crimp rivets.

--Scott

For some pleasure reading, try FAQ731-376

 

[CoryPad]

A tubular rivet is hollow along its entire length. A semi-tubular rivet is solid through the joint grip length and hollow beyond its grip length. The hollow part allows low forming force for easy deformation of the tail.

I don't know a good reference book. Try looking through the products at Textron Fastening Systems:

http://www.textronfasteningsystems.com/products/prod_blind.html

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[swertel]

I asked this question to some colleagues and they pointed me to this website.

http://www.assemblymag.com/CDA/ArticleInformation/features/BNP__Features__Item/0,6493,100503,00.html

The specific definition the website gave is quoted below.

A tubular rivet has a coaxial cylindrical or tapered hole in the headless end. It is secured by splaying or curling the end. To be classified as tubular, a rivet must have a hole depth that exceeds 112 percent of the mean shank diameter. Tubular rivets are ideal for light-load products that have very few strength requirements, such as electronic components.

A semitubular rivet is a rivet with a hollow end whose hole depth does not exceed 112 percent of the rivet body diameter. It requires much less insertion force and allows longer rivets to be used without buckling of the rivet shank. Rivet insertion force is typically less than 40 percent of that required for a solid rivet of the same shank diameter and material. The ability to easily curl the rivet is one of the biggest advantages of using semitubular rivets.

--Scott

For some pleasure reading, try FAQ731-376