Theoretical study of wood grinding mechanism in chipper

In this paper discuss the geometric aspects of the chipping and motion of the log in the process of chipping. Analysis of the experimental and theoretical data showed that the fractional composition of wood chips to a large extent depend on the disc-shaped work surface, as well as the shape and sharpening blades. Therefore, the theoretical study of the effect of the working surface profile of the disk and sharpening the knives on the feed rate of the logs (samozatyagivanie) and quality of the resulting schepy. By Analysis based on calculations performed by the mathematical model, demonstrated the possibility of using helical working surface of the disc and a spiral shape sharpening knives. However, this is only part of the production of the desired fractional composition of wood chips with minimal losses of wood raw material. Other issues related to the analysis of the geometric models of the motion of the grinding timber. Thus, applying the presented models of functioning of milling cutters and grinding timber movement, can be improve the quality of the wood chips.