The Impact of the Shape of the Knife Cutting Edge and Face Surface on the Power Indicators of?Wood Shredding

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UDС

UDC 674.05

DOI:

10.17238/issn0536-1036.2017.2.149

Abstract

The rational use of wood waste is one of the most important tasks of the complex processing of wood raw material. Different-sized wood waste should be shredded in the special chipping achines for the sawdust cement and solid biofuels production. The quality requirements for disintegrated wood for these productions are mainly limited by sizes of wood particles and content of impurities, which allow evaluating the efficiency of the cutting elements during shredding of a total volume of wood into chips of the required dimensions only by the intensity of the cutting force or its derivatives. In most cases, when wood cutting, the face angle constructively is a constant value (the length of the cutting edge), and the cutting edge can have a straight, inclined, triangular or radius shape. Quality indicators
of the circular cutting process by a cutting tool of these forms are obtained by wood materials processing with circular saws with carbide inserts. Power indicators of the cutting process (with identical conditions) of wood and wood-based materials are not numerous; the power indicators when using a cutting tool with a stepped shape of the cutting edge and the front surface, and a few cutting angles are virtually absent. The study is aimed at finding the optimal parameters of a cutting tool (knife), providing the lowest energy consumption in the primary wood shredding by milling. The experimental studies are carried out in a special test installation, which allows simulating the process of wood shredding by milling. Five types of blades of different geometric shapes of cutting edges and front surfaces are used.
The effectiveness of various types of blades is evaluated by a torque value. The most effective knife shape is determined as a result of a comparative analysis of all shapes of cutting elements. The dependence of the torque on the knife feed at a static pine wood cutting for three main directions of cutting is established.

Authors

E.O. Bulatasov, Postgraduate Student V.P. Popov, Candidate оf Engineering Sciences, Associate Professor V.P. Khanin, Candidate оf Engineering Sciences, Associate Professor

Affiliation

Orenburg State University, pr. Pobedy, 13, Orenburg, 460018, Russian Federation; е-mail:Eduard190319@mail.ru

Keywords

wood shredding by milling, optimum knife shape, test installation, torque, knifefeed, power indicator of wood shredding

For citation

Bulatasov E.O., Popov V.P., Khanin V.P. The Impact of the Shape of the Knife Cutting Edge and Face Surface on the Power Indicators of?Wood Shredding. Lesnoy zhurnal [Forestry journal], 2017, no. 2, pp.149–159. 10.17238/issn0536-1036.2017.2.149

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