Побединский А. А., Кокошин С. Н., Побединский В. В. Результаты испытаний предела прочности образцов древесины хвойных пород выпиленных разным методом // Научная жизнь. 2019. Т. 14. Вып. 6. С. 992–1005. DOI: 10.35679/1991-9476-2019-14-6-992-1005

Побединский Андрей Анатольевич, канд. техн. наук, доцент, ст. преподаватель кафедры лесного хозяйства, деревообработки и прикладной механики, ФГБОУ ВО «Государственный аграрный университет Северного Зауралья»: Россия, 625621, г. Тюмень, ул. Республики, 7.

Кокошин Сергей Николаевич, канд. техн. наук, доцент, доцент кафедры лесного хозяйства, деревообработки и прикладной механики, ФГБОУ ВО «Государственный аграрный университет Северного Зауралья»: Россия, 625621, г. Тюмень, ул. Республики, 7.

Побединский Владимир Викторович, д-р техн. наук, профессор, доцент кафедры сервиса и эксплуатации транспортных и технологических машин, ФГБОУ ВО «Уральский государственный лесотехнический университет»: Россия, 620100, г. Екатеринбург, ул. Сибирский тракт, 37.

Тел.: (345-2) 29-01-63

E-mail: vm993711@mail.ru

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ULTIMATE STRENGTH TEST RESULTS OF CONIFEROUS WOOD SAMPLES CUT BY DIFFERENT METHODS

Pobedinsky Andrey Anatolyevich, Cand. of Tech. Sci., Ass. Prof., Northern TransUral State Agricultural University, Tyumen, Russia.

Kokoshin Sergey Nikolaevich, Cand. of Tech. Sci., Ass. Prof., Northern Trans-Ural State Agricultural University, Tyumen, Russia.

Pobedinskiy Vladimir Viktorovich, Dr. of Tech. Sci., Prof., Ural State Forestry University, Yekaterinburg, Russia.

Keywords: sawing raw materials cutting, method of cutting lumber parallel to the trunk generatrix; bending strength.

Abstract. The problem of cutting lumberis considered. The relevance ofthe research is due to the need for a significant increasing lumber production in the nearfuture and until 2030,which is enshrined in the government program documents on the forest industry development. It is shown that a number of studies substantiate the method of cutting parallel to the generatrix of the trunk.It issuperiorto the traditional method, but the quality issues of the sawn timber, the conditions for minimizing the cutting of annual layers, and their strength parameters are not fully understood. The purpose of this work wasto conductresearch on the ultimate strength of solid wood, during static bending samples of soft timber sawn parallel to the generator axis and parallel to the central axis of the  trunk. Materials and methods. The methodological basis of the present research was made up by technological principles of woodworking industries and the wood science, and in terms of experimental research – by the theory of experiment and statistical data processing. The results of the research are experimental comparative values of the flexural strength of solid wood samples, obtained in the traditionalway in parallel with the method of the trunk generatrix. Recommendations on cutting method application and a practical example of calculating the cutting of sawn timber using the parallel-generatrix method are given for practical use. Discussions and conclusions. It is shown that the considered method can be recommended as the main one for cutting sawn softwood. In this case, the productivity of band sawing machinesisincreased by 1.5–2 times, the net output of sawn timber will be from 5–16% more, and the limit of bending strength is 10–14% higher. The results make it possible to effectively use the proposed method in lumbering practice, to obtain a greater yield of the deal, and, due to higher quality of sawn timber, to supply the marketwith the products of higher cost, unlike lumber obtained in the traditional way.

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