Publications by authors named "Bartosz Pałubicki"

3 Publications

  • Page 1 of 1

Cutting Forces in Peripheral Up-Milling of Particleboard.

Materials (Basel) 2021 Apr 25;14(9). Epub 2021 Apr 25.

Department of Woodworking and Fundamentals of Machine Design, Faculty of Wood Technology, Poznan University of Life Sciences, ul. Wojska Polskiego 38-42, 60-637 Poznań, Poland.

An analysis of forces acting in the peripheral up-milling of particleboard is presented. First, a novel method of high-frequency piezoelectric force signal treatment is proposed and used to separate the original force signal from the vibrations of the previous cutting iteration. This allows for the analysis of single chip cutting force courses during industrial CNC (Computer Numerical Control) milling. The acting forces are compared with the theoretical, instantaneous, uncut chip thickness. The results show that, for a range of 40-60 m/s, the higher the cutting speed used, the higher the resultant and principal cutting forces. The method of cutting thrust force used was similar to that observed in solid wood milling, i.e., first using a pushing action, followed by a pulling action. The obtained average specific principal cutting forces for particleboard peripheral up-milling are equal to 32.0 N/mm for slow and 37.6 N/mm for fast milling. The specific cutting thrust force decreases with the increase in instantaneous uncut chip thickness.
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http://dx.doi.org/10.3390/ma14092208DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8123317PMC
April 2021

Feed Force and Sawdust Geometry in Particleboard Sawing.

Materials (Basel) 2021 Feb 17;14(4). Epub 2021 Feb 17.

Department of Furniture Design, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, ul. Wojska Polskiego 38-42, 60-637 Poznań, Poland.

The measurement of cutting forces permits building of physic-mechanical cutting models for a better understanding of the phenomena observed during cutting. It also permits the design and optimization of processes, machines, tools, and wood preparation. Optimization of cutting conditions of wood-based materials can decrease the cutting forces, which directly relates to the energy consumption and surface quality. The sawdust analysis may serve for analysis of cutting kinematics and occupational health risk. The aim of the study was to estimate the correlation between the feed rate and both feed force and sawdust particle size produced during particleboard circular sawing. A saw machine type K700 was used in experiments. There were three feed rates of 12, 18, and 24 m/min executed by a horizontal pneumatic actuator fixed to the sliding side table of the saw machine. Based on the results of the experiments, a positive correlation was observed between the feed rate in a circular sawing process and feed forces and an unexpected particle size distribution depending on the feed rate.
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http://dx.doi.org/10.3390/ma14040945DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7922045PMC
February 2021

Influence of Exhaust System Setup on Working Zone Pollution by Dust during Sawing of Particleboards.

Int J Environ Res Public Health 2020 05 21;17(10). Epub 2020 May 21.

Department of Furniture Design, Faculty of Wood Technology, Poznań University of Life Sciences, ul. Wojska Polskiego 38-42, 60-637 Poznań, Poland.

Air pollution by wood dust in furniture production sites is an important hygiene issue. The dust is created by all types of wood and wood-based material machining, and its concentration in the working zone surrounding the machining stand depends on the effectiveness of the dust exhaust system. In present research, three setups of the dust extraction system for a conventional table sawing machine are considered while machining particleboards. The results showed a high impact of the exhaust system connection setup on the dust concentration in the air surrounding the sawing machine work stand. The use of both main and auxiliary sawdust extraction connectors together ensured the highest clearness of the air, with only 0.5 mg/m of dust concentration. Closing the upper hood leads to a concentration five times higher, while disconnecting it results in a ten times higher dust content. The finest dust particles (<1 µm), however, are the most numerous in the case of closing the hood.
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http://dx.doi.org/10.3390/ijerph17103626DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277351PMC
May 2020