Optimization of Tree Length Cross-Cutting at Timber-Handling Bases of Forest Holding Companies When Sawing Out Raw Material for Mast-Impregnation Plants

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Abstract

The paper suggests a new method and hardware for tree length dressing and cross-cutting, recommended for timber storehouses of holding companies with impregnation plants. The method can significantly improve the performance as well as yield of special assortments – raw material for mast-impregnation plants. In order to optimize the yield of net production, including raw material for mast-impregnation plants, we suggest using automated systems controlling the dressing and cross-cutting of tree length. With relatively small cross-cutting volumes (within 100 thousand m3 per year for small storehouses), we recommend using cross-cutters with lengthwise movement of tree length (LO-15S, LO-15A, LO-30, etc.), equipping them with the system of automated control (SAC) of tree length dressing and cross-cutting at their lengthwise movement. SAC includes a memory unit with parameters of supports planned for production; a unit measuring tree length parameters; a mechanism moving the tree length and a cutting mechanism. All of them are functionally related to each other, to the unit measuring tree length parameters and the memory unit (units for calculation of bark thickness, tree length rise, and interaction distance; a unit calculating the best cutting plan for tree length; comparators and correctors; an actuator for tree length moving and cutting, as well as devices sorting and marking the obtained supports). SAC is able to consistently optimize the dressing of assortment zones by length when sawing each support. The operator has to enter the parameters of supports planned for production and, if necessary, their price, as well as indicate the species of the wood to be cross-cut, enter this parameter into the control system, identify various defects of the trunk and, if necessary, switch over to the manual control of dressing and cross-cutting. The results of cross-cutting and sorting, i.e. volumes of supports sorted by size, species and qualitative characteristics, can be evaluated both in terms of cost and amount of commercial products manufactured by the enterprise at different periods of time.

Authors

O.A. Kunitskaya1, Candidate of Engineering, Associate Professor ; I.I. Tikhonov1, Candidate of Engineering, Associate Professor; D.E. Kunitskaya1, Postgraduate Student; I.V. Grigoryev1, Doctor of Engineering, Professor; A.E. Zemtsovsky2, Candidate of Engineering, Associate Professor 1 St. Petersburg State Forest Technical University, Institutskiy pereulok, 5, St. Petersburg, 194021, Russia, Е-mail: tlzp@inbox.ru  2 Northern (Arctic) Federal University named after M.V. Lomonosov, naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russia, E-mail: alz@atnet.ru

Affiliation

1 St. Petersburg State Forest Technical University, 2 Northern (Arctic) Federal University named after M.V. Lomonosov

Keywords

cross-cutting, wooden supports, timber holdings.

References

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