Basic Principle Of Rotary Cutting Machine

The rotary cutter is used to peel wood into veneers. The general method of peeling is: the left and right clamping shafts clamp the two ends of the wood and drive it to rotate, and the rotary blade installed on the knife bed is parallel to the axis of the clamping shaft and feeds along its vertical direction, peeling out veneers of equal thickness along the direction of the wood ring.
Whether it is constant speed peeling or constant line speed peeling, in order to obtain a veneer of a certain thickness, the feed amount of the knife bed should remain unchanged for every rotation of the clamping shaft, and the feed amount is equal to the nominal thickness of the veneer. By changing this feed amount, veneers of different thicknesses can be obtained.
During the peeling process, the trajectory of the rotary cutter blade on the cross section of the wood segment is called the peeling curve (as shown in Figure 1: Peeling Schematic Diagram), and its motion equation is:
r2= a2θ2 +h2
Where: r -- instantaneous radius of the wood segment;
a--base radius of the Archimedean spiral or the dividing circle of the involute, a =S/2π;
θ --polar angle, calculated from the ox direction;
h--knife height, that is, the distance between the rotary cutter blade and the horizontal plane of the clamping shaft axis.