Fatigue Strength of Band Saws
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2023, Vol 4, Issue 4
Abstract
One of the major disadvantages of band saws is their low durability. Breakages during the operation are mostly caused by fractures in notches between the blades of the band as a result of the fatigue phenomenon. The strength of the band saw blades is ensured if the assurance coefficient value is greater than the theoretically determined one. The value of the assurance coefficient of 2 is recommended. A schematic limit-amplitude diagram was used to calculate the durability of band saws. A formula for the estimation of the assurance coefficient was derived. It was used for the calculation of the assurance coefficients of the band saw blades manufactured in accordance with GOST 6532â77, which are applicable in dividing band saw machines. The resulting value of the assurance coefficient was 1.44. The value is extremely low for the band saws because it is much lower than required. Band saw blades should be sharpened regularly to ensure a long and reliable service life. It should be made not only to ensure the required sharpness of the blades but also to remove the defective layers in notches caused by fatigue phenomena. In the article, there are more recommendations for improving the durability of the blades of the band saws. The durability of a new type of band saw with curved aerostatic guides and hard alloy blades was evaluated. Its assurance coefficient was 2.4. Therefore, the machine can be operated reliably for a long time without regular treatment of the notches. Consequently, band saws have low durability due to their increased breakdown rate and low wear resistance. Hence, the costs of their purchase and treatment rise. Therefore, the results presented in the article are practically applicable. For citation: Prokofiev G.F., Kovalenko O.L. Fatigue Strength of Band Saws. Lesnoy Zhurnal = Russian Forestry Journal, 2023, no. 4, pp. 136â145. (In Russ.). https://doi.org/10.37482/0536-1036-2023-4-136-145
Authors and Affiliations
Gennadiy F. Prokofiev, Oleg L. Kovalenko
Keywords
Related Articles
- EP ID EP719885
- DOI 10.37482/0536-1036-2023-4-136-145
- Views 74
- Downloads 0
Optimization of Log Sorting by Diameter
This work is the final in the series of studies related to the issue of sorting logs by thickness while forming the sawing batches with optimal selection of sawlogs by diameter groups. In previous works, mathematical mod...
Cytogenetic Characteristics of Seed Progeny of Scots Pine Plus Tree Clones in Karelia
The article describes the cytogenetic parameters of seed progeny of Pinus sylvestris plus trees growing in the Petrozavodsk seed orchard of the first order. P. sylvestris normal trees from the natural pine phytocenosis i...
Stem Volume and Quality of Hybrid and Common Aspen in the Clonal Archive
Hybrid aspen as a fast growing tree species with short rotation is of interest for the creation of plantation forest crops in intensive forest management. Hybrid aspen wood is used to produce paper, lumber, and plywood,...
Integrated Application of Biostimulants in Cultivation of Siberian Spruce Seedlings (Picea obovata L.)
The article presents the results of a 5-year experiment on the cultivation of Siberian spruce seedlings combined with integrated use of biostimulants. Additionally, it describes an experience in application of the acquir...
Influence of Reconstructive Cutting in Deciduous-Spruce Stands on Root Competition of Species
The predominance of mixed forest stands in a productive forest fund, which is located in the middle taiga subzone of Northwest Russia, determines the relevance of an investigation of the growth and development characteri...