New design of circular saw blade body and its influence on critical rotational speed

• Autorzy: Droba A. , Javorek L. , Svoreň J. , Paulíny D.

Identyfikatory

DOI

10.12841/wood.1644-3985.081.12

• Języki publikacji: EN

Abstrakty

EN

Oscillation is an unwelcome state as it has adverse effects not only on the work piece but also on the tool. This paper deals with the problem of circular saw blade oscillation and the effect of modification of the circular saw blade body on the natural frequency as well as on the critical rotational speed. The calculation and experimental investigation of the natural frequencies and node shapes on two types of circular saw blades were carried out. Two methods used to determine the natural frequencies are presented: the first, modal analysis (FEM), a theoretical method, and the second, experimental measurement. The results of the investigation were used to compare the FEM and experimental methods and to show which modification achieved a higher critical rotational speed. Both methods were conducted on two circular saw blades for continual cutting with 36 teeth and slots.

Słowa kluczowe

EN

circular saw blade; critical rotational speed; modal analysis; natural frequencies; slots

• Wydawca: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
• Czasopismo: Drewno : prace naukowe, doniesienia, komunikaty
• Rocznik: 2015
• Tom: vol. 58, nr 194
• Strony: 147--157
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Droba A.

• Technical University in Zvolen, Zvolen, Slovakia

autor

Javorek L.

• Technical University in Zvolen, Zvolen, Slovakia

autor

Svoreň J.

• Technical University in Zvolen, Zvolen, Slovakia

autor

Paulíny D.

• Technical University in Zvolen, Zvolen, Slovakia

Bibliografia

• Cristóvão L., Ekevad M., Grönlund A. [2012]: Natural frequencies of roll-tensioned circular sawblades: Effects of roller loads, number of grooves, and groove positions. BioRes. 7 [2]: 2209–2219
• Droba A., Paulíny D., Svoreň J. [2013]: Porovnanie teoretických a experimentálnych hodnôt vlastných frekvencií pílového kotúča (Comparison of theoretical and experimental values of natural frequencies of circular saw blade). Acta Facultatis Technicae 18 [1]: 39–46
• Ekevad M., Cristovao L., Grönlund A. [2009]: Different methods for monitoring flatness and tensioning in circular–saw blades. In: Proceeding 19th International Wood Machining Seminar, Nanjing, 21–23 October 2009: 121–131
• FREUD, Italy [accessed 2014.11.25]. Available from:www.freudtools.com/index.php/products?c=Saw_Blades&shop=Woodworker#/products?c=Saw_Blades&shop=Woodworker#/products?c=Saw_Blades&shop=Woodworker#%2Fproducts%3Fc=Saw_Blades&shop=Woodworker
• Gogu G. [1988]: Berechnung der Eigenfreguenzen von Kreissägeblättern mit der Finite-Element-Methode. Holz als Roh- und Werkstoff 46 [3]: 91–100
• Holøyen S. [1987] Vibrations and natural frequencies of angular slot circular saws. Holz als Roh- und Werkstoff 45: 101–104
• Hutton S.G. [1991]: The dynamics of circular saw blades. Holz als Roh- und Werkstoff 49 [3]: 105–110
• KANEFUSA Corporation, Japan [accessed 2014.11.25]. Available from: www.kanefusa.jp/eng/products/wood/timberprocessing/tctsawblade/3.html
• Leopold J., Münz V.V. [1992]: Dynamische und statische Untersuchungen von Kreissägeblättern mittels der Finite-Elemente-Methode. Holzbearbeitung 39 [6]: 52–56
• Michna S., Svoreň J. [2007]: Application of CAD, CAE with FEM for estimation ranges of values of critical rotational speed of circular saw blades. Acta Facultatis Technicae 9 [1]: 201–206
• Mote C.D. [1965]: Free vibration of initially stressed circular disk. Journal of Engineering for Industry 5: 258–264
• Nishio S., Marui E. [1996]: Effects of Slots on Lateral Vibration of Circular Saw Blade. In: Proceedings of Tenth Wood Machining Seminar: 159–164. DOI: 10.1016/0890--6955(95)00088-7
• Orłowski K., Sandak J., Tanaka C. [2007]: The critical rotational speed of a circular saw: simple measurement method and its practical implementations. Journal of Wood Science 53 [5]: 388–393
• Schajer G.S., Mote C.D. [1983]: Analysis of roll tensioning and its influence on circular saw stability. Wood Science Technology 17 [4]: 287–302
• Schajer G.S. [1992]: North American techniques for circular saw tensioning and leveling: Practical adjustment methods. Holz als Roh- und Werkstoff 50 [4]: 153–157
• Stakhiev Y.M. [1970]: Rezonansnyje kolebanija diskovych pil. Izv. VUZ, Lesnoj žurnal 13 [5]:78–84
• Stakhiev Y.M. [1998]: Research on circular saw vibration in Russia: From theory and experiment to the needs of industry. Holz als Roh- und Werkstoff 56 [2]: 131–137
• Stakhiev Y.M. [2000]: Today and tomorrow circular saw blades: Russian version. Holz als Roh- und Werkstoff 58 [4]: 229–240
• Svoreň J. [1986]: Dynamická stabilita pílových kotúčov z aspektu ich valcovania. Kandidátska dizertačná práca. DF VŠLD Zvolen (The dynamic stability of saw discs from their rolling point of view.) Doctoral thesis. Faculty of Wood Science and Technology. University of Forestry and Wood Technology. Zvolen. pp.135
• Veselý P., Kopecký Z., Hejma Z., Pokorný P. [2012]: Diagnostics of circular saw blade vibration by displacement sensors. Drvna Industrija 63 [2]: 81–86. DOI: 10.5552/drind.2012.1130
• Yu R.C., Mote C.D. [1987]: Vibration of Circular saws containing slots. Holz als Roh- und Werkstoff 45 [3]: 155–160