THE DYNAMIC MEASUREMENT OF CONTINUOUS BENDING RIGIDITY OF CURVED PLYWOOD STRIPS

It was offered to measure the continuous bending rigidity (the parameter of quality) of curved plywood strips (products) using continuous bending technique. The strip moves over the production line on the conveyor belt where it is bent when it is placed over the recessed path and the load force and the bending amplitude is measured. The bending rigidity and its variation along the strip are calculated. The prototype of the measurement system was implemented in the production line of the curved plywood strips. Relative expanded measurement uncertainty of the dynamic measurement of continuous bending rigidity is U(sx)=+/- 0.012 or 1.2%.