Dependence of Cutting Forces on Planing Direction and Plywood Edge Width

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UDС

674-415

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Abstract

Plywood is widely used in national economy, but there are no experimental studies on edge cutting machining of plywood. Thus, such data is highly relevant. The order to obtain  information about the dependence of the cutting forces on the wood fiber cutting angle and plywood thickness, we conducted a number of experimental studies on plywood edge planing in laboratory settings. The stroking speed V = 0.035 m/s, the blade cutting angle d = 55°, the thickness of the layer being cut а = 0.07; 0.1; 0.15; 0.2 mm. Planing width b = 4; 6; 9 mm. The tool edge radius r0= 15 µm. Cutting forces were measured by a strain-guage dynamometer, the data being processed by the hardware-software environment LabView. The samples were sawn from a single sheet of five-layer birch plywood 6.0 mm thick and 0.77 g/cm3 dense. The sample edges are set to the wood fibers of the outer (inner) layers of plywood at angles of 0°; 30°; 45°; 60°; 90°.  We proved that tangential cutting force reaches its maximum at a fiber cutting angle of 45°. At an angle of 60°, tangential cutting force is lesser. Additionally, we showed that with increase in the planing width (plywood thickness) the cutting forces do not vary directly as the plywood thickness. With increase in the plywood thickness the value of specific cutting force goes up.

Authors

I.T. Glebov, Candidate of Engineering, Associate Professor;V.V. Glebov, Master

Affiliation

The Ural State Forest Engineering University

Keywords

plywood edge, planing, cutting force, direction of fibers, plywood thickness, experimental study.

References

1. Vinogradova N.A., Listratov Ya.I., Sviridov E.V. Razrabotka prikladnogo programmirovaniya v srede Labview [Development of Application Programming in Labview]. Moscow, 2005. 230 p. 2. Glebov I.T., Glebov V.V. Oborudovanie dlya proizvodstva i obrabotki fanery [Equipment for Plywood Production and Processing]. St. Petersburg, 2012. 352 p.