Dependence of band saw noise on the welding method
DOI:
https://doi.org/10.36930/42204610Keywords:
laser welding; noise reduction; improvement; damping attachmentAbstract
The band saw used on a woodcutting band saw machine must be securely connected to the endless band, and the connection method must provide both the required strength and the lowest noise level during operation. The research methodology covers the stage of detecting, using a professional noise level meter, the sections of the cutting mechanism with the highest level of noise and the stage of measuring the noise level on a band saw machine at an idle mode with tension supports, for saws: 1 – connected by arc welding, and the joint weld is located at an angle of 90° to the rear edge; 2 – connected by laser welding, and the seam is located at an angle of 90° to the rear edge; 3 – connected by laser welding, and the seam is located at an angle of 60° to the rear edge. The experiments were carried out on a modern horizontal band saw machine MEBOR HTZ 1200 with a wide band. The machine is designed for lengthwise cutting of logs in order to obtain high quality lumber. Measurements of the noise level during the operation of band saws showed that noise is generated in certain sections of the cutting mechanism – the section of the saw run on the pulley, the section of contact of the saw with the first guide and the section of the saw exit from the second guide. It has been established that during the operation of horizontal bandsaw machines, in which saws are used and whose ends are connected by traditional arc welding and the weld is located at an angle of 90° to the rear edge of the saw, the noise level exceeds the sanitary norms by a maximum of 35 dB. It is found that welding of band saws by modern laser method, when the seam is located at an angle of 60° to the rear edge of the saw, allows obtaining a noise level 10–15 dB less than with laser welding of the saw when the seam is at an angle of 90° to the indicated edge. An analysis of the noise spectra showed that the linear spectrum of sound pressure has a uniform distribution of the sound energy radiation intensity in a wide frequency range of 125–8000 Hz. It was found that, starting from the third octave (125 Hz), for a laser-welded saw with the seam located at an angle of 60° to the rear edge of the saw, the noise level exceeds the sanitary norms (80 dB) by 19 dB. The experimental studies have shown a significant reduction in noise when using band saws welded by a laser method and with the seam located at an angle of 60° to the rear edge of the saw. It was found that in some frequency bands the noise level exceeds sanitary norms and in this regard the design of a band saw machine with a new damping device is proposed, which, according to data from the technical literature, will provides further noise reduction; and in order to clarify the amount of noise reduction, it is necessary to conduct further experimental studies.
References
Litvinov, A.E., Chukarin, A.N., Kornienko, V.G. (2011). Eksperimental'nyye issledovaniya shumov i vibratsii na lentochnopil'nykh stankakh [Experimental studies of noise and vibration on band saw machines]. Polythematic network electronic scientific journal KubSAU. №69(05). (in Russian)
Litvinov, A.E. (2015). Nekotoryye aspekty shumoobrazovaniya lentochnopil'nykh stankov [Some aspects of noise generation of band saws]. Collection of articles by students, graduate students, young scientists and teachers of the international conference "Vectors of science development": 74–75. (in Russian)
Ryzhkov, D.N. (1961). Vibratsii pri rezanii metallov i metody ikh ustraneniya [Vibrations when cutting metals and methods for their elimination]. Moscow: Mashgiz,, 201 p. (in Russian)
Rebeznyuk, I., Lazarchuk, K. (2019). Osoblivostí lazernogo zvaryuvannya derevinorízal'nikh stríchkovikh pilok [Features of laser welding of wood-cutting band saws]. Forestry, Forest, Paper and Woodworking Industry 45: 145-150 (in Ukrainian).
Sposíb lazernogo zvaryuvannya derevorízal'nikh stríchkovikh pilok [The method of laser welding of wood-cutting band saws]: US Pat. on the utility model №150257 Ukraine. IPC B23K 26/32 (2014.01). № u2021 04809; stated 25.08.21; publ. 01/19/22 Bull. № 3. 4p. (in Ukrainian).
Gayda S.V., Kiyko O.A. (2013). Технология очистки вторично используемой древесины иглофре-зерными станками [The technology of cleaning recycled wood with needle milling machines] // Actual prob-lems and prospects of the development of LPK: materials II NTK., September 9-11, 2013 – Kostroma. – P. 36-39. (in Russian).
Gayda S.V., Kiyko O.A. (2018). Shape stability as a quality criterion for PCW-made blockboards. Proceedings of the Forestry Academy of Sciences of Ukraine, 17, 185-192. https://doi.org/10.15421/411834 (in Ukrainian)
Gayda S.V., Kiyko O.A. (2020). Determining the regime parameters for the surface cleaning of post-consumer wood by a needle milling tool. Eastern-European Journal of Enterprise Technologies, 5 (1(107)), 89-97. https://doi.org/10.15587/1729-4061.2020.212484.
Gayda S.V., Kiyko O.A. (2020). The investigation of properties of blockboards made of post-consumer wood. Poznan : Drewno, 63(206), 77-102. https://doi.org/10.12841/wood.1644-3985.352.10.
Gayda S.V., Maksimiv V.M., Kiyko O.A., Ferenc O.B. (2013). Залишки деревини та деревина піс-ля споживання. Класифікація. Терміни та визначення [Wood residues and post-consumer wood. Classifica-tion. Terms and definitions] / Agreement No. 08.24-11-1: draft international standard ISO. – Lviv: NLTU of Ukraine – 53 p. (in Ukrainian).
Gayda S.V., Voronovich V.V. (2011). Investigation of the features of bending of post-consumer wood // Proceedings of the Conference, Mari State University. – 190-192 (in Russian).
Gayda S.V. (1998). Основи створення гнучких автоматизованих виробництв [Basics of creating flexible automated production]. – Lviv. – 149 p. (in Ukrainian).
Gayda S.V. (1999). Проблеми та перспективи роботизації меблевої промисловості [Problems and prospects of robotics in the furniture industry]. Scientific Bulletin of UNFU 9.5:192-195. (in Ukrainian).
Gayda S.V. (2000). Матеріали для виготовлення виробів з деревини / Materials for the Productsion of wood Productss. Lviv: BMC. – 160 p. (in Ukrainian).
Gayda S.V. (2002). Особливості та перспективи роботизації меблевої промисловості України [Peculiarities and prospects of robotization of the furniture industry of Ukraine]. Scientific Bulletin of UNFU 12.5:38-40. (in Ukrainian).
Gayda S.V. (2003). Гнучкі виробничі модулі для виготовлення ґратчастих меблевих виробів [Flexible production modules for the production of lattice furniture products]. Scientific Bulletin of UNFU 13.2:120-122. (in Ukrainian).
Gayda S.V. (2004). Інтегровані технології меблевого виробництва [Integrated technologies of furniture production]. Scientific Bulletin of UNFU 14.4:118-121. (in Ukrainian).
Gayda S.V. (2007). Дослідження концентрації операцій у сучасному меблевому виробництві / Doslidzhennya kontsentratsiyi operatsiy u suchasnomu meblevomu vyrobnytstvi [Research of concentration of operations is in modern furniture Productsion]. Forestry, Forest, Paper and Woodworking Industry 33:73-79 (in Ukrainian).
Gayda S.V. (2013). The technological solutions for recycling of post-consumer wood. Proceedings of I International Interdisciplinary Scientific Conference Formation of stable outlook as the basis of sustainable development (Ukraine, Lviv, 14-16 March 2013) UNFU: Lviv, 5-11.
Gayda S.V. (2013). Розроблення технології виробництва паливних гранул на основі енергетично-го потенціалу вживаної деревини [Development of technology for the production of fuel pellets based on the energy potential of used wood]. Scientific Bulletin of UNFU 23.14:83-93. (in Ukrainian).
Gayda S.V. (2014). Sposoby podgotovki k pererabotke vtorichno ispol'zuyemoy drevesiny iglofrezernymi i shchotochnymi stankami [Preparation methods for processing of post-consumer wood (PCW) needle-milling and brushing machines]. Actual problems of forest complex 40:65-69 (in Russian).
Gayda S.V. (2015). Investigation of physical and mechanical properties of post-consumer wood. Ac-tual problems of forest complex 43:175-179, (in Russian).
Gayda S.V. (2015). Tekhnologії і fіziko-mekhanіchnі vlastivostі stolyarnikh plit іz vzhivanoї derevini [Technology and physical and mechanical properties blockboard made of post-consumer wood]. Technical ser-vice of agriculture, forestry and transport systems 3(1).145-152 (in Ukrainian).
Gayda S.V. (2016). Formoustoychivost' stolyarnykh plit iz vtorichno ispol'zuemoy drevesin [A form of stability of blockboards made of post-consumer wood]. Actual problems of forest complex 46:148-153, (in Russian).
Gayda S.V. (2017). Tekhnologiya i svoystva mebel'nogo shchita iz vtorichno ispol'zuemoy drevesiny [A technology and properties of furniture board made of post-consumer wood]. Actual problems of forest complex 48:34-38, (in Russian).
Gayda S.V. (2017). Використання нечітких експертних систем для підтримки прийняття рішень в процесі сортування вживаної деревини / Vykorystannya nechitkykh ekspertnykh system dlya pidtrymky pryynyattya rishenʹ v protsesi sortuvannya vzhyvanoyi derevyny [Using fuzzy expert systems for decision sup-port in the process of post-consumer wood sorting]. Forestry, Forest, Paper and Woodworking Industry 43:5-20 (in Ukrainian). doi: https://doi.org/10.36930/42174301
Gayda S.V. (2018). A investigation and analysis of characteristics of solid furniture boards made of post-consumer wood. Forestry, Forest, Paper and Woodworking Industry, 44, 15-25. https://doi.org/10.36930/42184402 (in Ukrainian).
Gayda S.V. (2018). Strength of combined blockboard made of post-consumer wood (PCW). Bulletin of KhNTUA 197:3-9, (in Ukrainian).
Gayda S.V. (2019). Scientific and technical basis of the use of used wood in woodworking: thesis of the Doctor of Technical Sciences in the specialty 05.23. – Lviv: UNFU. – 465 (in Ukrainian).
Gayda S.V., Bilyy Ya.M. (2019). Дослідження технологічних процесів виготовлення ліжок двоспальних різних конструкцій / Doslidzhennya tekhnolohichnykh protsesiv vyhotovlennya lizhok dvospalʹnykh riznykh konstruktsiy [A investigation of technological processes of making beds of double different designs]. Forestry, Forest, Paper and Woodworking Industry 45:21-31 (in Ukrainian). doi: https://doi.org/10.36930/42194504
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