METHOD OF PRODUCING BUTT-END REDUCED LOGS AND CURTAIN RAILS AND DEVICE TO THIS END Russian patent published in 2009 - IPC B27C5/00 

FIELD: process engineering.

SUBSTANCE: proposed method comprises wood milling and sawing. Milling is effected in horizontal plane along sines curve to observe required parametres of axial-radius curvature R, segment angle γ of cross section parametres, i.e. diametre of log A, height and width of curtain rail. To ensure aforesaid parametres, process parametres are selected, i.e. L - step of sine wave L=2Rsinγ/2, distance H from workpiece axis to that of the carriage that control crosswise and angular travel of processing unit, H=Rcosγ/2. Note here that workpiece cross section height parametres comply with order step in blockhouse, width B parametres make B=A+t+2R(1-cos γ/2), where t is milling allowance. Note also that milling is carried out by rotor-type milling cutters operated in operating conditions 1 to produce sine wave or 2 to produced rectilinear section and sine wave.

EFFECT: higher accuracy of milling.

2 cl, 8 dwg