Engineering Journal: Science and InnovationELECTRONIC SCIENCE AND ENGINEERING PUBLICATION
Certificate of Registration Media number Эл #ФС77-53688 of 17 April 2013. ISSN 2308-6033. DOI 10.18698/2308-6033
  • Русский
  • Английский
Article

Kinematics and durability of a circular saw of a robotic unit for woodworking

Published: 23.10.2018

Authors: Karpachev A.Yu., Buketkin B.V., Voyakin A.S.

Published in issue: #10(82)/2018

DOI: 10.18698/2308-6033-2018-10-1817

Category: Mechanics | Chapter: Dynamics, Strength of Machines, Instruments, and Equipment

Effective development and subsequent use of robotic systems are inextricably linked with the study of the dynamics of their elements. The necessity of the study when designing such systems is due to the difficulties in justifying the choice of permissible parameters that ensure a given working capacity and the operating conditions of the components of these systems. For woodworking machines equipped with robotic units, a crucial task is to determine the allowable kinematic modes of using circular saws that perform complex rotational movements during operation. It is important to take into account the analysis of the stress-strain state arising in them.  The solution of this problem was carried out on the basis of the developed mathematical model of a thin disk (thin plate), whose relative and transportable rotation occurs around intersecting axes. The formulated boundary value problem was calculated using numerical methods. The stresses in the disk and its deformation were determined according to the kinematic characteristics of its movement. The calculation of the allowable frequencies of rotation of the saw blade was carried out through the example of a circular saw from the Uniteam Ultra robotic machining center (Italy). In order to obtain the necessary initial data for strength analysis, experiments were conducted to determine the strength characteristics of the steel from which the saws of this machining center are made. The results of the calculations make it possible to impose restrictions on the rotational speeds of a circular saw when the machining center operates taking into account its geometrical parameters and the mechanical characteristics of the material. The proposed method for studying the spatial movement and behavior of a cutting disk tool is necessary for the selection of technological modes of operation of modern woodworking equipment


References
[1] Nikitin N.N. Kurs teoreticheskoy mekhaniki [The course of theoretical mechanics]. Moscow, Vysshaya shkola Publ., 1990, 607 p.
[2] Rabotnov Yu.N. Mekhanika deformiruemogo tverdogo tela [Mechanics of a deformable solid]. Moscow, Nauka Publ., 1979, 744 p.
[3] Stakhiev Yu.M. Rabotosposobnost ploskikh kruglykh pil [Efficiency of flat circular saws]. Moscow, Lesnaya promyshlennost Publ., 1989, 384 p.
[4] Kovalenko A.D. Kruglye plastiny peremennoy tolshhiny [Round plates of variable thickness]. Moscow, Fizmatgiz Publ., 1959, 295 p.
[5] Karpachev A.Yu. Inzhenerny zhurnal: nauka i innovatsii — Engineering Journal: Science and Innovation, 2012, issue 7 (7). DOI: 10.18698/2308-6033-2012-7-294
[6] Karpachev A.Yu., Nebesny M.V., Ovchinnikov V.A. Izvestiya vuzov. Mashinostroenie — Proceedings of Higher Educational Institutions. Маchine Building, 2007, no. 5, pp. 3–12.
[7] Karpachev A.Yu. Povedenie odnomernykh i dvumernykh modeley pri sfericheskom dvizhenii [The behavior of one-dimensional and two-dimensional models at spherical motion]. Tez. dokl. Mezhdunarodnoy konferentsii «Fundamentalnye i prikladnye zadachi mehaniki», Moskva, 24–27 oktyabrya 2017 [Abstracts of reports of International scientific conference Fundamental and applied problems of mechanics (FAPM–2017), Moscow, October 24–27]. Moscow, 2017, pp. 19–20.
[8] Demyanushko I.V., Birger I.A. Raschet na prochnost vraschayuschikhsya diskov [Stress calculation of rotating disks]. Moscow, Mashinostroenie Publ., 1978, 247 p.
[9] Biderman V.L. Mekhanika tonkostennykh konstruktsiy. Statika [Mechanics of thin-walled structures. Statics]. Moscow, Mashinostroenie Publ., 1977, 488 p.
[10] Karpachev A.Yu. Vestnik mashinostroeniya — Russian Engineering Research, 2006, no. 5, pp. 32–36.
[11] Karpachev A.Yu. Sozdanie raschetnykh metodov povysheniya ekspluatatsionnykh kharakteristik diskov rezhuschikh instrumentov. Diss. Dr. tekhn. nauk [Creation of calculation methods for improving the performance characteristics of cutting tool disks. Dr. eng. sc. diss.]. Moscow, 2015, 277 p.
[12] Biderman V.L. Teoriya mekhanicheskikh kolebaniy [Theory of mechanical oscillations]. Moscow, Vysshaya shkola Publ., 1980, 408 p.
[13] Karpachev A.Yu. Naukoemkie tekhnologii — Science Intensive Technologies, 2001, vol. 2, no. 3, pp. 52–57.
[14] McCracken D.D., Dorn W.S. Numerical methods and FORTRAN programming. John Wiley & Sons Ltd., 1964, 457 p. [In Russ.: McCracken D.D., Dorn W.S. Chislennye metody i programmirovanie na Fortrane. Moscow, Mir Publ., 1977, 584 p.].
[15] Dyakonov V.P. Spravochnik po algoritmam i programmam na yazyke beysik dlya personalnykh EVM [Handbook of algorithms and programs in the BASIC language for personal computers]. Moscow, Nauka Publ., Gl. red. fiz.-mat. lit. Publ., 1987, 240 p.
[16] Collins J.A. Failure of Materials in Mechanical Design: Analysis, Prediction, Prevention. 2nd ed. 1993, 672 p. [In Russ.: Collins J.A. Povrezhdenie materialov v konstruktsiyakh. Analiz, predskazanie, predotvraschenie. Moscow, Mir Publ., 1984, 624 p.].