Formation of Sectoral Residual Thermoplastic Tension Fields in Circular Saw Blade. P. 146–154

Complete text of the article:

Download article (pdf, 0.7MB )

UDС

621.365.5

DOI:

10.37482/0536-1036-2023-4-146-154

Abstract

The efficiency of a stationary circular saw is determined by the performance and operational reliability of the woodcutting unit. During operation, the circular saw blade is exposed to a variety of complex loads and thermal conditions. The rigidity and stability of the saw blade determine its capacity to resist the perturbing cutting forces. The cutting compound itself is a thin disc made of steel with a hole in the middle that has a serrated cutting edge. It consists of three areas: peripheral, middle, and central. The stability of the saw blade is determined by the middle and peripheral parts. The increase in durability is achieved by plastic deformation to form the strip boundaries of the radial sections. These parts are treated by forging in both national and international practice. Normalization of loads on the blade in case of local mechanical contact with the working body is formed in the strip boundaries of the radial sections through the formation of places with plastic deformation of the metal, which rearrange the loads and place them in the radial direction. At the same time, countertension appears from the adjoining sections, leading to mutual “repulsion” of them and the creation of compressive tension that compensates for the forces of centrifugal acceleration, thermal heating of separate areas of the saw blade, external longitudinal and transverse bending tension that arise during wood processing. The combined interaction of all adjoining sections provides the tension and stability of the saw blade. The creation of the radial sections by forging has some significant disadvantages. Their elimination requires a fundamentally new approach, such as the formation of the residual stress sections in the saw blade by thermal exposure. It creates a normalized residual thermoplastic tension in the saw blade by a short-time (1–2 s) focused thermal influence on the strip boundaries of the radial sections. The results of the conducted research determined the boundaries of the sections for thermal treatment and the temperature range, which ensure the formation of normalized residual thermoplastic tension in the circular saw blade through concentrated pulsed heating of the strip edges of radial sections.

Authors

Vladimir I. Melekhov, Doctor of Engineering, Prof.; ResearcherID: Q-1051-2019, ORCID: https://orcid.org/0000-0002-2583-3012
Ivan I. Solovev*, Candidate of Engineering; ResearcherID: ABE-7412-2020, ORCID: https://orcid.org/0000-0002-2008-7073

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; v.melekhov@narfu.ru, i.solovev@narfu.ru*

Keywords

circular saw, thermoplastic tension, stability, focused thermal exposure

For citation

Melekhov V.I., Solovev I.I. Formation of Sectoral Residual Thermoplastic Tension Fields in Circular Saw Blade. Lesnoy Zhurnal = Russian Forestry Journal, 2023, no. 4, pp. 146–154. (In Russ.). https://doi.org/10.37482/0536-1036-2023-4-146-154

References

1. Birger I.A. Residual Tensions. Moscow, Gosudarstvennoye izdatel’stvo «Mashinostroyeniye» Publ., 1963. 232 p. (In Russ.).

2. Bogatov A.A. Mechanical Properties and Models of Metal Destruction. Yekaterinburg, USTU-UPI Publ., 2002. 329 p. (In Russ.).

3. Bogatov A.A. Residual Tensions and Metal Destruction. Innovative Technologies in Metallurgy and Mechanical Engineering: Proceedings of the 6th International ScientificPractical Conference of Ural Scientific-Pedagogical School named after Professor A.F. Golovin, Yekaterinburg, 29 October – 1 November 2012. Yekaterinburg, Izdatel’stvo Ural’skogo universiteta Publ., 2013, pp. 95–101. (In Russ.).

4. Borovikov E.M., Orlov B.F. Thermal Treatment of Circular Saws. Lesnoy Zhurnal = Russian Forestry Journal,1974, no. 6, pp. 90–94. (In Russ.).

5. Borodin I.N., Mayer A.E., Petrov Yu.V., Gruzdkov A.A. Maximum Yield Strength Under Quasi-Static and High-Speed Plastic Deformation of Metals. Solid State Physics, 2014, vol. 56, no. 12, pp. 2384–2393. (In Russ.). https://doi.org/10.1134/S1063783414120051

6. Melekhov V.I., Solovyov I.I. Creation of Thermoplastic Tension in Circular Saw Blade. Lesnoy Zhurnal = Russian Forestry Journal, 2010, no. 2, pp. 87–91. (In Russ.). http://lesnoizhurnal.ru/upload/iblock/b08/b087c4466253da22ed3e19c778437576.pdf

7. Melekhov V.I., Solovyev I.I., Tyurikova T.V., Ponomareva N.G. Improving the Stability of Wood-Cutting Saws by Thermoplastic Action on the Distribution of Residual Stresses in The Blade. Lesnoy Zhurnal = Russian Forestry Journal, 2020, no. 6, pp. 172–181. (In Russ.). https://doi.org/10.37482/0536-1036-2020-6-172-181

8. Melekhov V.I., Solovyev I.I. Device for Creating Thermoplastic Stresses in Circular Saw Blade. Patent RF no. RU 2434952 С1, 2011. (In Russ.).

9. Melekhov V.I., Solovyov I.I. Device for Creation Thermoplastic Normalized Stresses in Circular Saw Blade. Patent RF no. RU 2684521 С1, 2019. (In Russ.).

10. Pozdeyev A.A., Nyashin Yu.I., Trusov P.V. Residual Stresses: Theory and Applications: А Monograph. Moscow, Nauka Publ., 1982. 109 p. (In Russ.).

11. Prokofiev G.F. Creation of High-Tech Sawmills: А Monograph. Arkhangelsk, Solti Publ., 2018. 157 p. (In Russ.).

12. Stakhiyev Yu.M. Stability and Vibration of Flat Circular Saws. Moscow, Lesnaya promyshlennost’ Publ., 1977. 296 p. (In Russ.).

13. Stakhiyev Yu.M. Scientific and Technological Bases of Production, Setting-Up and Operation of Flat Circular Saws for Wood Sawing: Dr. Eng. Sci. Diss. Abs. Arkhangelsk, 2002. 32 p. (In Russ.).

14. Akunin N.K. Setting-Up of Circular Saws. Moscow, Lesnaya promyshlennost’ Publ., 1980. 151 p. (In Russ.).

15. Bathe K.J. Finite Element Procedures in Engineering Analysis. New Jersey, Prentice Hall Publ., 1982. 735 p.

16. Bayer R.J. Mechanical Wear Fundamentals and Testing, Revised and Expanded. New York, CRC Press Publ., 2004. 416 p. https://doi.org/10.1201/9780203021798

17. Calladine C.R. Theory of Shell Structures. Cambridge, Cambridge University Press Publ., 1983. 763 p. https://doi.org/10.1017/CBO9780511624278

18. Hughes T.J.R., Hinton E. Finite Element Methods for Plates and Shells: Elements Technology. Vol. 1. Swansea, Pineridge Press Publ., 1986. 315 p.

19. Meyers M.A., Chawla K.K. Mechanical Behavior of Materials. Cambridge, Cambridge University Press Publ., 2009. 856 p. https://doi.org/10.1017/CBO9780511810947