Decomposition of cutting forces in quasi-orthogonal CNC milling

Kopecký, Zdeněk; Hlásková, Luďka; Rousek, M.

doi:10.5604/01.3001.0013.7704

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…This model takes into account the elements of fracture mechanics (fracture toughness R ) and shear yield strength, τ γ . This methodology was elaborated for the cases of wood cutting with the frame saw machine by the authors [ 35 , 36 , 37 ], the band saw machine [ 29 ], the milling machine [ 38 ], and the circular sawing machine [ 33 ].…”

Section: Methodsmentioning

confidence: 99%

Interaction between Thermal Modification Temperature of Spruce Wood and the Cutting and Fracture Parameters

et al. 2021

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This work examines the effect of thermal modification temperatures in the production of thermally modified wood on the cutting and fracture parameters when cutting heat-treated spruce wood by a circular sawblade machine. The samples were thermally modified at 160, 180, 200, and 220 °C. One sample was unmodified and was used as a reference sample. On the basis of the performed experiments, the fracture parameters (fracture toughness and shear yield strength) were calculated for the axial–perpendicular direction of cutting. In comparison with the theoretical assumptions, the influence of temperature on the cutting and fracture parameters was confirmed. Thermally treated wood is characterized by increased fragility and susceptibility to crack formation, as well as reduced density, bending strength, and shear strength. These properties significantly affect the size of the cutting force and feed force, as well as the fracture parameters. As the temperature increases, the values of these parameters decrease. The mentioned material characteristics could be useful for the optimization of the cutting process, as well as for the issue of energy consumption during the machining of heat-treated wood.

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Section: Methodsmentioning

confidence: 99%

Interaction between Thermal Modification Temperature of Spruce Wood and the Cutting and Fracture Parameters

et al. 2021

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“…The geometry of the saw blade and the Ernst-Merchant circle (Figure 4) yields a simple mathematical apparatus for calculating additional forces that classify the entire cutting process (Kopecký et al, 2019).…”

Section: Metodementioning

confidence: 99%

Impact of Circular Saw Blade Design on Forces During Cross-Cutting of Wood

et al. 2022

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This paper evaluates the impact of the number of saw blade teeth on kinematic and dynamic parameters during cross-cutting of soft and hard woods with mitre saw BOSCH GCM 12 GLD Professional. The forces measured using a three-dimensional XYZ dynamometer Kistler 9257B and subsequent calculation based on a mathematical model were applied in the Ernst-Merchant diagram and the forces acting in the cutting of spruce and oak planks were analysed and compared. The wood cutting was performed by four geometrically and structurally similar blades with a 300 mm diameter and with different count of WZ-shaped teeth (z = 26, 36, 48, 60). The optimum saw blade for the given cutting conditions was subsequently assessed by statistical analysis. Unlike many studies researching the cutting resistances in transversal and longitudinal wood cutting, this experiment and force analysis was performed in dependence on the constant feed force.

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“…However, there has been a lack of material properties description affecting the cutting force during shredding of wood-based waste. Available models for estimating the force when cutting or machining wood or wood-based materials are available for machines such as: circular saw (Porankiewicz et al 2011;Orłowski et al 2013;Kopecký et al 2014), band saw (Orlowski and Ochrymiuk 2017;Chuchała and Orłowski 2018), chain saw (Kuvik et al 2017), largesize crusher (Yu et al 2012), and milling machine (Džinčić and Skakić 2012;Guo et al 2015;Mandić et al 2015;Krauss et al 2016;Durković et al 2018;Kopecký et al 2019;Wei et al 2018). However, there is no information for designers of machines shredding furniture waste regarding the value of forces that their cutting mechanisms must carry.…”

Section: Introductionmentioning

confidence: 99%

Wood-based boards mechanical properties and their effects on the cutting process during shredding

Kukla

Warguła

2021

BioRes

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In order to design effective shredding machines dedicated to shredding wood-based waste, information about the mechanical properties of materials subjected to shredding is necessary. A number of mechanical properties of particleboard, oriented strand boards, and medium-density fibreboards in the aspect of shredding process have been experimentally determined in the article. The influence of material type, blade geometries, and cutting depth on cutting force and elasticity coefficient were analysed. Blade geometries reflect different phases of rotation of the cylindrical wood chipper’s knife. It has been shown that a knife with the most favourable geometry is characterized by the lowest values of the stiffness coefficient for each of the materials. This is the geometry of the cylindrical wood chipper’s knife exactly halfway into the cutting process. By contrast, the least favourable geometry is characterized by a knife corresponding to the beginning of the cutting process. Among the tested materials, the medium density board requires the most energy to change its structure, and the laminated particleboard requires the least. The presented results can be a set of input data necessary to model the work required to implement the cutting process, but also enable validation of existing cutting models.

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Decomposition of cutting forces in quasi-orthogonal CNC milling

Cited by 3 publications

References 3 publications

Interaction between Thermal Modification Temperature of Spruce Wood and the Cutting and Fracture Parameters

Interaction between Thermal Modification Temperature of Spruce Wood and the Cutting and Fracture Parameters

Impact of Circular Saw Blade Design on Forces During Cross-Cutting of Wood

Wood-based boards mechanical properties and their effects on the cutting process during shredding

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