Evolution of the Topological Structure of Wood-Milling Cutters

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UDС

621.931

DOI:

Abstract

Modern wood industry is actively applying interlocking cutters with disposable cutter elements made of tool steel and hard alloys. Currently, manufacturers offer a great number of interlocking cutters varying in design, locating methods and types of blade insertion. When developing and producing new designs of interlocking wood-milling cutters, manufacturers rarely take into account quality parameters of the cutter and, first of all, its operational reliability. As there are no integrated engineering methods for choosing the optimal cutter design, there emerged several approaches to determination and forecasting of reliability and service life of interlocking cutters. The aim was to identify key areas for improvement and development of the topological structure of the interlocking wood-milling cutter with regard to required operational reliability and manufacturability. Based on the analysis of existing quality evaluation approaches for interlocking cutters, we indicated advantages and disadvantages of the empirical methods used by manufacturers to determine reliability and service life of interlocking cutters. The article provides the results of research and development projects on improvement of wood cutter design, with regard to its operational reliability, manufacturability and efficiency. The design of the wood-milling cutters was improved both in terms of the form of the cutter element, and their location in the housing. The article presents arrangement schemes for cutting units, equations for key parameters of operational reliability, as well as drafts for assembly and replacement of cutter elements. The existing methods of forecasting operational reliability of the interlocking cutter are of probabilistic nature, which prevents designers from using them when creating new designs; сhanges in the topological structure of the wood-milling cutter both in terms of location and fitting of the cutter elements in the housing, changes in the form and number of blades and changes in the form of the cutter element call forth integrated engineering methodologies to evaluate cutter quality at the design stage.

Authors

V.I. Malygin, L.V. Kremleva, N.V. Lobanov, V.I. Melekhov Northern (Arctic) Federal University named after M.V. Lomonosov

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov

Keywords

wood-cutting tool, reliability, service life, topology, optimization, calculation method.