Force to squeeze rivet

[baszawez]

Hello, i/m new here. I wolud like to know how to calculate how much force i need to use to squeeze a rivet in cold riveting
I have 4mm diameter steel rivet, total length with head is 12,5 mm. I don't want to answer with exactly force i should to use but I'd like to know how to calculate it.

 

[metengr]

A rough approximation will require knowing the yield strength of the material. You can determine the approximate area of deformation based on the projected rivet head dimensions. Knowing both of these variables you can estimate the force. This of course does not take into account friction forces related to the die forming the rivet head, but should get you in the ballpark.

 

[racookpe1978]

Rivet head dia? (large dia of the rivet head would be the extreme number wouldn't it?)
Or rivet post dia => Probably too little though.

 

[blacksmith37]

You can squeeze it with any force, but if you want to upset it like the figure ; As has been pointed out you need exceed the yield strength.