Wood milling forces/power
Wood milling forces/power
(OP)
Usually, in machining calculations, the cutting force made by materials are calculated this way:
F = K . S
Were K is the machining strength of the material to be cut (N/mm2) and S is section for the removed chip.
K is tabulated usually for steel and metals in a lot of books, however I need to know this K for general wood.
Can someone help me?
F = K . S
Were K is the machining strength of the material to be cut (N/mm2) and S is section for the removed chip.
K is tabulated usually for steel and metals in a lot of books, however I need to know this K for general wood.
Can someone help me?





RE: Wood milling forces/power
I will help you out. Would you please explain me what is that “the machining strength of the material to be cut” – Is it a new mechanical characteristic of material?
Regards
Viktor
http://viktorastakhov.tripod.com
RE: Wood milling forces/power
RE: Wood milling forces/power
Do you really understand what your answer implies? In lay language it means that the cutting force for a given chip cross-sectional area (width of cut times uncut chip thickness) depends only on the tensile strength of the work material. Whatever you do in terms of altering the cutting regime (speed and feed), tool material, tool geometry including rake angle, use coolant, etc. – all this does not affect the cutting force. Please explain me the issue – I would love to gain some knowledge on the matter.
Thank you
Viktor
RE: Wood milling forces/power
My particular application is a wood milling machine with 4 mm thickness of blade and around 104 mm diameter, this machine is only for plunging in the wood up to 22 mm (no lateral movement). I have 2 targets:
1. To design the most appropiate cutting blade (nber of teeth, angles of cutter) for wood. These must come from usual recommendations in woodworking and I found some info about it in www.woodweb.com (only cutting angle, not the other angles affected).
2. To calculate the motor requirements for the application and optimum machining conditions. Here is where I need the formulae. I know that motors 620 W and 11000 rpm should be ok but need to justify. I have some clues from Hutte Engineer Manual (based on sawing bibliografy) but the aproximation is too rought, so I would like a more complete formulae.
I would appreciate your help in both lines
Thanks for your interest.
Eduard
RE: Wood milling forces/power
kind regards
Eduard