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Lesnoy Zhurnal

Wear Resistance Improvement of Delimbing Knives of Multifunctional Logging Machines

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G.A. Pilyushina, E.A. Pamfilov, E.V. Sheveleva

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Delimbing of harvested wood is the first step towards obtaining finished products, where it is necessary to strain after achievement of maximum efficiency in the use of raw materials and quality improvement of the obtained assortment. Herewith, high-quality cleaning and minimization of damage of tree trunks is associated to a great extent with reliable operation of the delimbing and pull-through devices of logging machines that carry out both removal of branches and technological movement of wood. An intensive blunting of delimbing knives occurs in operation of the delimbing and pull-through device. As a result, the forces spent on delimbing increase and the process of stable cutting is disrupted. Partial cutting, and with an increase in pressure on the knives their cutting into a trunk and breaking out of limb occur, which reduce the quality of the harvested wood and lead to further intensification of wearing out of the cutting devices. The wearing out of knives is due to the action of a complex set of mechanical, chemical, temperature and other factors that accompany the technological process. This leads to a change in the dimensions of knife cutting edges. In order to improve the quality of delimbing and at that reduce the energy consumption, it is necessary to assess the influence of geometric and physico-chemical parameters of the cutting knives on their wear resistance, which will allow to theoretically justify the rational geometry of the cutting wedge and requirements for the physico-chemical characteristics of the recommended materials. The force interaction analysis of the cutting wedge with the cut limb has shown that, already at the beginning of the contact, the cutting blade is acted by the shock bending load, which, when peak values are reached, often leads to wearing out by chipping of sufficiently large microvolumes of the cutting edge. In this case, the wearing out of delimbing knives occurs mainly due to the development of microcracks, which are formed as a result of anti-plane deformation when applying stresses, and depends on the parameters of brittle crushing of materials. Moreover, the wearing out becomes more intense with contact with contaminated and wet, and in winter period frozen wood, which leads to intensification of corrosion and mechanical processes in the marginal areas of knife blades. The solution of the problem of increasing the wear resistance of delimbing knives can be provided by optimization of dimensions of knife wedge and formation of favorable physical and mechanical characteristics in the surface layer that minimize the wear intensity. The favorable dimensions of knife wedge were experimentally determined for this purpose. Complex alloyed chromium-nickel steel and rational modes of its heat treatment are proposed for the manufacture of delimbing knifes. Electrodeposition hardening is recommended as the surface treatment, which allows to optimize the surface roughness and form a favorable compressive stress in the marginal areas, thus providing high wear resistance of delimbing knives.


G.A. Pilyushina1, Candidate of Engineering, Assoc. Prof.; ResearcherID: H-1699-2019, ORCID: 0000-0002-2422-0919 
E.A. Pamfilov1, Doctor of Engineering, Prof.; ResearcherID: H-1866-2019, ORCID: 0000-0002-1522-7246 
E.V. Sheveleva2, Candidate of Engineering, Assoc. Prof.; ResearcherID: H-2080-2019, ORCID: 0000-0002-1763-6932 

Authors job

1Bryansk State Technical University, bul. 50-letiya Oktyabrya, 7, Bryansk, 241035, Russian Federation; e-mail:
2Bryansk State Engineering Technological University, prosp. Stanke Dimitrova, 3, Bryansk, 241037, Russian Federation; e-mail:


timber harvesting, delimbimg knives, friction, wear resistance, wedge geometry, tribological parameters, electrodeposition processing

For citation

Pilyushina G.A., Pamfilov E.A., Sheveleva E.V. Wear Resistance Improvement of Delimbing Knives of Multifunctional Logging Machines. Lesnoy Zhurnal [Russian Forestry Journal], 2019, no. 6, pp. 174–184. DOI: 10.17238/issn0536-1036.2019.6.174


  1. Zhadenov V.S., Zaikin A.N., Lobanov V.N., Chayka O.R. Technological Equipment of Logging Machines (Theory, Construction, Operation). Bryansk, BGITA Publ., 2005. 254 p.
  2. Zotov G.A., Pamfilov E.A. Increasing the Resistance of a Wood-Cutting Tool. Moscow, Ekologiya Publ., 1991. 304 р.
  3. Harvester Head and Its Add-on Equipment. Harvesting and Logging Equipment.
  4. Rukomoynikov K.P., Vedernikov S.V. Modernization of Harvester Head Delimbing Knife. Lesnoy Zhurnal [Forestry Journal], 2019, no. 1, pp. 120–127. DOI: 10.17238/issn0536-1036.2019.1.120; URL:
  5. Pamfilov E.A., Pilyushina G.A. Possibilities and Prospective Ways to Increase Working Capacity of Forest Sector Machines and Equipment. Lesnoy Zhurnal [Forestry Journal], 2013, no. 5, pp. 129–141. URL:
  6. Pilyushina G.A. Improving the Wear Resistance of Parts and Tools of Woodworking Machinery. Kachestvo i zhizn’ [Quality and life], 2014, no. 1(1), pp. 44–49.
  7. Pamfilov E.A., Pilyushina G.A., Sheveleva E.V., Prozorov Ya.S., Pyrikov P.G. Improving the Feeder’s Working Capacity of Timber Processing Equipment. Lesnoy Zhurnal [Forestry Journal], 2019, no. 2, pp. 102–110. DOI: 10.17238/issn0536-1036.2019.2.102; URL:
  8. Seliverstov A.A., Simonova I.V., Aleksandrov A.A. Studying the State of Shape Geometry and Sharpening of Delinbing Knives of Harvesters. Trudy lesoinzhenernogo fakul’teta PetrGU [Resources and Technology], 2010, iss. 8, pp. 128–132.
  9. Syunev V.S., Seliverstov A.A. Working Bodies of Harvesters: Engineering and Design. Petrozavodsk, PetrSU Publ., 2005. 202 p.
  10. Syunev V.S., Seliverstov A.A. Development of Cut-to-Length Logging and Use of Harvesters in the Republic of Karelia. Les i biznes, 2006, no. 7, pp. 58–61.
  11. Axelsson S.-A. The Mechanization of Logging Operations in Sweden and Its Effect on Occupational Safety and Health. Journal of Forest Engineering, 1998, vol. 9, iss. 2, pp. 25–31.
  12. Axelsson S.-A, Pontén B. New Ergonomic Problems in Mechanized Logging Operations. Journal of Industrial Ergonomics, 1990, vol. 5, iss. 3, pp. 267–273. DOI: 10.1016/0169-8141(90)90062-7
  13. Darmawan W., Rahayu I.S., Tanaka C., Marchal R. Chemical and Mechanical Wearing of High Speed Steel and Tungsten Carbide Tools by Tropical Woods. Journal of Tropical Forest Science, 2006, vol. 18, no. 4, pp. 255–260.
  14. Engsås J. Accidents in Small-Scale Forestry – Prerequisites for Accident Prevention among Private Wood-Lot Owners. Research Note no. 251. Garpenberg, Swedish University of Agricultural Sciences, 1993. 121 p.
  15. Lidén E. Forest Machine Contractors in Swedish Industrial Forestry. Report no. 195. Garpenberg, Swedish University of Agricultural Sciences, 1995. 43 p.
  16. Niemi P. Delimbing Device and a Method in a Delimbing Device. Patent US, no. US 6,318,425 B1, 2001
  17. Pamfilov E.A., Pilushina G.A., Polosov V.I. Conditions of Maintenance of Stable Frictional Contact of Submitting Rollers Woodworking Machines. Proceedings of the BALTTRIB 2007 International Scientific Conference, Kaunas, November 21–23, 2007. Kaunas, 2007, pp. 67–71.
  18. Pamfilov E.A., Sheveleva E.V., Pilyushina G.A. Creating and Applying Antifriction Bearing Wood-Metal Materials. Journal of Friction and Wear, 2019, vol. 40, iss. 1, pp. 95–99. DOI: 10.3103/S106836661901015X
  19. Pilyushina G.A., Pyrikov P.G., Rukhlyadko A.S. Improving the Performance of Machining Tools for Nonmetallic Materials. Russian Engineering Research, 2013, vol. 33, iss. 9, pp. 532–535. DOI: 10.3103/S1068798X13090128
  20. Porankiewicz B., Iskra P., Sandak J., Tanaka C., Jóźwiak K. High-Speed Steed Tool Wear after Wood Cutting in the Presence of High-Temperature and Mineral Contamination. Wood Science and Technology, 2006, vol. 40, iss. 8, pp. 673–682. DOI: 10.1007/s00226-006-0084-7
  21. Wildey A.J. Tree Harvesting and Processing Head. Patent US, no. 5,785,101, 1998.

Wear Resistance Improvement of Delimbing Knives of Multifunctional Logging Machines