The results of the experimental studies are cutting force values under specified cutting condition. The cutting force was related to the cutting condition elements as well as other parameter influencing the cutting force in molding the beech parallel-to-grain. The relationship is expressed by a mathematical model based on a regression curve and regression equations.
Considering that machineability parameters can be reasonably satisfactory expressed by exponential equation, the relationship between cutting force and parameters influencing the cutting force in molding of beech parallel-to-grain be given by:
F = Cf a p1 · u p2
The experimental studies were based on two-factor orthogonal plan of the first order with total number of experiments
N = 22 + 4
The variables involved, depth of cut (a) and feed rate (u), are chosen to agree with conditions of two-factor orthogonal plan, i.e. a s2 = amax · amin and
u s2 = umax · umin.
For the measurement of cutting force the dynamometer was used and other measuring equipment described in the paper, as well.
The values of coefficients, p1 and p2, from themathematical model (usually termed as machineability parameters) are obtained by a matrix calculations or by computer program. After substitution of the calculated data in the mathematical model for the cutting force, the correlation between mean tangential cutting force (Fom) and depth of cut and feed rate under the studied conditions.
Keywords: cutting force, machineability, molding, depth of cut, feed rate.
Correspondence: Dusan Skakic, University of Belgrade, Faculty of Forestry, Department of Wood Science and Tehnology, Kneza Viseslava 1, 11030 Belgrade, Yugoslavia
Fax: +381-11-545-485