Wood milling forces
Wood milling forces
(OP)
Dear all,
I need to check stresses in a wood milling machine. I search on my books but I've data only for steel as milled material.
I'd use the following formula to compute tangential forces acting in the milling cutter:
FT = ksm * (va/(z*n)) * sqrt(p/D) * B
where
va: cutter/piece advancing velocity
z: teeth number
n: rpm
p: cutting depth
D: cutter diameter
B: cutter thickness
I don't know the value to give to ksm for the wood.
For steel, ksm is such as 5 kN/mm2.
Thanks again Michele
I need to check stresses in a wood milling machine. I search on my books but I've data only for steel as milled material.
I'd use the following formula to compute tangential forces acting in the milling cutter:
FT = ksm * (va/(z*n)) * sqrt(p/D) * B
where
va: cutter/piece advancing velocity
z: teeth number
n: rpm
p: cutting depth
D: cutter diameter
B: cutter thickness
I don't know the value to give to ksm for the wood.
For steel, ksm is such as 5 kN/mm2.
Thanks again Michele





RE: Wood milling forces
This is the way I read it. How close am I?
Force = material strength (tensile strength?) x (linear velocity /(tooth count x rpm)) x (square root?) of (cutting depth / cutter diameter) x cutter thickness
Or the force required depends on the resistance of the material by the feed rate by the size of the bite.
The force required also depends heavily on tool sharpness (sometimes measured by edge radius) and the tool tip material.
There are some wood strengths at:
http://www.woodbin.com/ref/wood/strength_table.htm
Tom
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
RE: Wood milling forces
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