Hi, colleagues!
I construct and plan to manufacture a smaller, three-sided CNC router for processing soft materials, where the hardest workpiece would be an aluminum board. I made a trial version, without any calculation, and used a weaker stepper motor and I am completely satisfied with the work, so I started working on a more serious version.
The shaft of the electric motor would be coupled to the spindle shaft with the timing belt; I determined the necessary characteristics of the pulleys and adopted the belt.
I am currently calculating shaft of the main motion(spindle shaft) and I am trying to determine the force it loads when cutting, in addition to the force that tightens the belt. There is also a tangential force at the top of a milling cutter.
? So I'm interested in how to calculate the tangental (Ft) and radial (Fr) force when cutting aluminum with an 8mm endmill with 4 flutes. (There is also an axial force, but my priority is radial). The attachment is a schematic view of the spindle.
I found some literature where is shown method to calculate these forces, but there are tables with coefficients and exponents related only to steel. I didn't found any information related to aluminum cutting.
So if anyone knows how to determine these forces, I would be extremely grateful to post here.
In one handbook I found this equations(i put them on separate document), but as I said, there is only table for steel and cast iron. I am looking for these informations related to Aluminum.
I found very quality presentation for calculating tangental, cutting force(Ft=Fc), and radial force which loads the spindle shaft is calculated by: Fr=1.3*Ft,
If someone needs it, it's in the attachments.
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Milling force-cutting Aluminum
I have this table: Milling force-cutting Aluminum
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