EVALUATION OF A SIMPLIFIED METHOD FOR SAWING REGIMES DETERMINING

UDC 674.093.6

Grinevich Sergey Anatol’yevich – PhD (Engineering), Associate Professor, Assistant Professor, the Department of Woodworking Machines and Tools. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: gres410a@yandex.ru

Babich Dmitriy Pavlovich – Senior Lecturer, the Department of Woodworking Technology. Belarusian State Technological University (13a, Sverdlova str., Minsk, 220006, Republic of Belarus). E-mail: babich_tdp@mail.ru

Makarevich Andrey Viktorovich – student. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: dosy@belstu.by

DOI: https://doi.org/ 10.52065/2519-402Х-2023-270-2-29 (In Russian).

Key words: log, feed rate, simplified method, feed per tooth, error.

For citation:  Grinevich S. A., Babich D. P., Makarevich A. V. Evaluation of the simplified method for sawing regimes determining. Proceedings of BSTU, issue 1, Forestry. Nature Management. Processing of Renewable Resources, 2023, no. 2 (270), pp. 245–250. DOI: 10.52065/2519-402Х-2023-270-2-29 (In Russian).

Abstract

The article assesses a simplified method of determining the feed rate of logs when sawing them with sawmill machines of different types. The necessity of this work is caused by the importance of correct determination of this parameter of sawing mode as for the development of a competent technological process of log sawing with obtaining of qualitative lumber products, and for correct planning of sawmills' work. Existing methods of accurate calculation of feed rate are very labor- and time-consuming, so the use of a simplified method will greatly simplify the work of sawmill technologists. However, it is necessary to make sure that the investigated method allows to calculate the feed rate with a small error and, consequently, can be used for practical and educational calculations. During the analysis of the investigated method of feed rate calculation it was found that its authors assumed that the feed rate is in inverse proportional dependence on the diameter of sawn logs. Thus, knowing from the machine characteristics the minimum and maximum feed rate, as well as the minimum and maximum diameter of the sawing logs, this dependence can be found and used to determine the feed rate for other diameters of the processing material. Analysis of methods for exact calculation showed that both when using the calculation method developed by Professor A. L. Bershadsky, and when using the power formula, the dependence of the feed rate on the diameter of logs has a more complex nature. Calculations to determine the magnitude of the error in calculating the feed rate when using the simplified method in comparison with the method of Professor Bershadsky were conducted. Having analyzed the results of these calculations the following main conclusions were made. The method of simplified calculation of the feed rate can be used for machines in which the maximum and minimum feed rates are determined by the condition of full use of the power of the cutting unit drive. The error in determining the feed rate decreases as the range of log diameters that can be sawn on the machine decreases.

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References

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15.03.2023