Kindly suggest me methods or analytical formula of axial forces in milling machine?
You can read the article in following link:
https://link.springer.com/content/pdf/10.1007%2Fs00170-017-0292-3.pdf
I think it will be useful.
Dear Mohamed Yassin B. thank you for your answer, its a useful paper for using dynamo-meter, but do you know any other methods that measure axial forces without using of dynamo-meter?
If you compressed a hard spring (and yoy know the constant K of the spring) and simultaneously measure the axial displacement with a mechanical or digital gauge, you could calculate the axial stiffness of your machine like Kz = Fz / dz
I think that between (50 to 100) kg per micrometer is normal.
When you know the stiffness of your machine, you only need to instale a gauge in axial direction and when you make a FSW process you could measure the displacement and then calculate the axial force.
Warning with the shoulder of the tool. The greater the diameter, the axial force increase too much.
Dear professor Daniel Martinez, thank you very much indeed! It's a very nice idea! Being fix the dial gauge in the z -direction or parallel to the tool. Therefore I will get the total displacement of the tool i.e. pin + shoulder displacement and calulate the axial force.
You re welcome friend. We have similar problems in Argentina. Only a few equipments, but a lot of desire to work!!!!
I do not know the size of the milling machine, but you could use a digital bascule to measure the axial force instead of spring.
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