Revisiting The Determination Of Cutting Power While Sawing Of Wood With Circular Saw Blades By Means Of Fracture Mechanics

Kazimierz Orłowski; Tomasz Ochrymiuk

Revisiting The Determination Of Cutting Power While Sawing Of Wood With Circular Saw Blades By Means Of Fracture Mechanics

Abstract

In the classical approach, energetic effects (cutting forces and cutting power) of wood sawing process are generally calculated on the basis of the specific cutting resistance, which is in the case of wood cutting the function of more or less important factors. On the other hand, cutting forces (power) could be considered from a point of view of modern fracture mechanics. Cutting forces may be employed to determine not only toughness but also shear yield strength, which are then applied in the models. Furthermore, forecasting of the shear plane angle for the cutting models, which include fracture toughness in addition to plasticity and friction, broaden possibilities of energetic effects modeling of the sawing process even for small values of the uncut chip. However, for circular sawing machines the chip acceleration power variation as a function of mass flow and tool velocity ought to be included in analysis of sawing at larger cutting speeds. In this paper the forecasting method for determination of cutting power for sawing with circular saw blades is going to be described. The prognostication of energetic effects are done for a real sawing pattern applied in a sawmill, in which mainly Polish pine wood is sawn into lumber. Even though, the raw material is a pine (Pinus sylvestris L.) its mechanical data is really affected by its provenance, even as it concerns just the Polish territory.

Authors (2)

Kazimierz Orłowski prof. dr hab. inż.
Tomasz Ochrymiuk
- INSTYTUT MASZYN PRZEPŁYWOWYCH im. Roberta Szewalskiego Polskiej Akademii Nauk Zakład Przepływów Transonicznych

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Details

Category:: Conference activity
Type:: publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
Title of issue:: 21st International Wood Machining Seminar: Proceedings strony 46 - 55
Language:: English
Publication year:: 2013
Bibliographic description:: Orłowski K., Ochrymiuk T.: Revisiting The Determination Of Cutting Power While Sawing Of Wood With Circular Saw Blades By Means Of Fracture Mechanics// 21st International Wood Machining Seminar: Proceedings/ ed. IWMS21 Organizing Committee Tsukuba, Japan: The Japan Wood Research Society, 2013, s.46-55
Verified by:: Gdańsk University of Technology