Development of a monitoring system for guided circular saws: an experimental investigation

Mohammadpanah, Ahmad; Lehmann, B.; White, John

doi:10.1080/17480272.2017.1415970

Cited by 20 publications

(8 citation statements)

References 5 publications

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“…Therefore, the saw in the given configuration represents the weakest element of the system. Several attempts were made to predict the behaviour of the tool during the machining 5 , 27 . Most of these revealed that the geometrical accuracy of the products being manufactured depends on the transverse displacements of saw blades.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Lateral forces determine dimensional accuracy of the narrow-kerf sawing of wood

Orłowski

Chuchała

Szczepański

et al. 2022

Sci Rep

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The shrinking global forest area limits the supply of industrially usable raw resources. This, in combination with the ever-increasing consumption of timber due to population growth can lead to the lack of a positive balance between the annual volumetric growth and consumption of wood. An important innovation toward increasing environmental and economic sustainability of timber production is to reduce the volume of wood residues by minimizing the sawing kerf. It results in higher material yield but may impact the dimensional accuracy of derived products. Therefore, the cutting tool geometry as well as the sawing process as a whole must be carefully optimized to assure optimal use of resources. The goal of this study is to better understand the causes of machining errors that occur when sawing wood with saws of varying thickness of kerf, with a special focus on re-sawing thin lamellae performed on the gang saw. Numerical simulations were tested against experimental results, considering influence of diverse components of cutting forces, in addition to the initial and operating stiffness coefficients of the saw blade. It has been demonstrated that asymmetric loads from the cutting process for the scraper saw blade can cause sawing inaccuracies. The simulation methodology developed in this research can be straightforwardly extended towards determination of optimal geometry of other cutting tools, particularly with the reduced sawing kerf. This may lead to more sustainable use of natural resources as well as an increase in economic gain for the wood processing industries.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Lateral forces determine dimensional accuracy of the narrow-kerf sawing of wood

Orłowski

Chuchała

Szczepański

et al. 2022

Sci Rep

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“…This difference in temperature Based on experimental measurements, other authors [23,33,34] reported similar temperature values in the range between 22 and 24 • C for the area of clamping flanges. At the position of the temperature sensor of 110 mm from the shaft axis, there was a significant increase in the surface temperatures of the discs to values of 25 to 26.5 • C. At the last position of the sensor closest to the heel circle of the teeth, (R = 155 mm) from the shaft axis, the surface temperature of the CSB1 reached 31.5 • C. Mohammadpanah et al [34] state a temperature of 33 • C for the area of the heel circle of teeth. The circular saw blade CSB2, which had a powder-coated coating applied to the surface, differed significantly in temperature from CSB1, mainly in the area R = 155 mm.…”

Section: Circular Saw Blade Surface Temperaturementioning

confidence: 52%

“…These temperatures increased slightly with increasing feed speed to the values of 25 to 26.5 °C. Based on experimental measurements, other authors [23,33,34] reported similar temperature values in the range between 22 and 24 °C for the area of clamping flanges. At the position of the temperature sensor of 110 mm from the shaft axis, there was a significant increase in the surface temperatures of the discs to values of 25 to 26.5 °C.…”

Section: Circular Saw Blade Surface Temperaturementioning

confidence: 63%

“…At the last position of the sensor closest to the heel circle of the teeth, (R = 155 mm) from the shaft axis, the surface temperature of the CSB1 reached 31.5 °C. Mohammadpanah et al [34] state a temperature of 33 °C for the area of the heel circle of teeth. The circular saw blade CSB2, which had a powder-coated coating applied to the surface, differed significantly in temperature from CSB1, mainly in the area R = 155 mm.…”

Section: Circular Saw Blade Surface Temperaturementioning

confidence: 99%

“…The use of a thermocouple with a diameter wire d = 0.125 to 0.15 mm was applied [23][24][25]. Measurement of the temperature of a circular saw blade body with an infrared thermometer is mentioned by the authors of [26][27][28][29][30][31][32][33][34]. The simulation of the temperature cutting process by means of a digital computer was carried out by the author of [35].…”

Section: Introductionmentioning

confidence: 99%

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Reducing the Energy Consumption of Circular Saws in the Cutting Process of Plywood

et al. 2022

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Cutting, as the most widely used machining process, is applied in both primary and secondary wood processing. Optimum cutting conditions that result in the high quality of the machined surface and low energy consumption are crucial for wood processing. The effects of the feed speed, cutting speed and average chip thickness on the energy consumption and surface temperature of a circular saw blade during the cutting process of two types of plywood with a thickness of h = 14 mm is described in this paper. In experimental measurements, two circular saw blades with cutting tungsten carbide inserts for wood were used as tools. One circular saw blade was standard, and was not surface treated (CSB1), and second circular saw blade (CSB2) differed by the powder coating surface and the length of the cutting edge. In the experiment, the energy consumption and the surface temperature of the circular saw blade was measured in order to find the optimal cutting conditions for the most energy-efficient cutting process. The results show that the cutting power and the surface temperature of the circular saw blade increased when the feed speed increased. The investigated values of the surface-treated circular saw blade were lower compared to the values of the standard circular saw blade. When comparing the lightweight plywood with the classic plywood, experimentally obtained cutting power values of the circular saw were made 19% lower on average by using the circular saw blade CSB1. When using the CSB2 circular saw blade, these values of the cutting power of the circular saw were 22% lower on average. The surface temperature of the circular saw blade is the highest on the outer edge (tooth root area 31.7 °C) and decreases towards the center of the circular saw blade. There must be a reasonable compromise between machine productivity and energy consumption.

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