MATHEMATICAL MODELING OF THERMAL STRESS PROCESS OF FLAT GRINDING OF WORKPIECES USING COMPOSITE WHEELS


Cite item

Full Text

Abstract

Currently, the most significant reserve for improvement of grinding technological efficiency involves the application of the composite grinding wheels (CGW). However, the CGW is more complicated body comparing with the intermittent (IGW) and standard (SGW) grinding wheels due to the presence of lubricating elements (LE) filled with the solid lubricating material (SLM) with a density different from the density of the material of the wheel abrasive part. The problems and issues of IGW and SGW application when grinding are thoroughly studied, however, the CGW design features make it more difficult or impossible to apply the techniques and mathematical models developed for the SGW and the IGW to describe grinding process. In this regard, it is necessary to pay special attention to the problem of mathematical modeling of thermal physics of the grinding process using the CGW. The paper suggests the mathematical model of thermal stress of flat pendulum grinding by the periphery of CGW with the structural elements in the form of radial slits filled with the solid lubricant. This model allows estimating the temperature field on the surface and inside the workpiece throughout the full working three-stage cycle of flat pendulum grinding including the forward motion of grinding wheel to touch with the workpiece and grinding with inward movement and sparkling-out. The developed mathematical model is based on the calculation of the Pz tangential component of grinding force of each travel of grinding and sparkling-out. This will allow determining the density of heat flow emitted in the contact zone, and the average contact temperature of each travel of GW. The combination of the results of calculation of average contact temperature of all travels of grinding and sparkling-out will allow assessing the temperature field of the full cycle of grinding and predicting the occurrence of grinding defects.

About the authors

Nikolay Ivanovich Vetkasov

Ulyanovsk State Technical University, Ulyanovsk

Author for correspondence.
Email: nppwt@ulstu.ru

Doctor of Sciences (Engineering), Professor, Head of Chair “Mechanical engineering”

Russian Federation

Oleg Gennadyevich Krupennikov

Ulyanovsk State Technical University, Ulyanovsk

Email: krupennikov_oleg@mail.ru

PhD (Engineering), assistant professor of Chair “Mechanical engineering”

Russian Federation

Sergey Igorevich Ulitin

Ulyanovsk State Technical University, Ulyanovsk

Email: ulitinserega91@mail.ru

postgraduate student of Chair “Mechanical engineering”

Russian Federation

References

  1. Reznikov A.N. Teplofizika rezaniya [Cutting thermophysics]. Moscow, Mashinostroenie Publ., 1969. 288 p.
  2. Sipaylov V.A. Teplovye protsessy pri shlifovanii i upravlenie kachestvom poverkhnosti [Thermal processes in grinding and the control of surface quality]. Moscow, Mashinostroenie Publ., 1978. 167 p.
  3. Yakimov A.V. Optimizatsiya protsessa shlifovaniya [Grinding process optimization]. Moscow, Mashinostroenie Publ., 1975. 176 p.
  4. Yakimov A.V. Preryvistoe shlifovanie [Faltering grinding]. Kiev, Vishcha shkola Publ., 1986. 174p.
  5. Yakimov A.V., Tkachenko V.O., Zimin S.G., Yakimov A.A., Novikov F.V., Novikov G.V. Teplovye protsessy pri obychnom i preryvistom shlifovanii [Thermal processes at usual and faltering grinding]. Odessa, OGPU Publ., 1998. 272p.
  6. Khudobin L.V., Vetkasov N.I. Shlifovaniye kompozitsionnymi krugami [Grinding by composite wheels]. Ulyanovsk, UlGTU Publ., 2004. 256 p.
  7. Ostrovsky V.I. Teoreticheskie osnovy protsessa shlifovaniya [Theoretical bases of process of grinding]. Leningrad, LGU Publ., 1981. 144 p.
  8. Armer A.I. Povysheniye effektivnosti ploskogo mayatnikovogo shlifovaniya putem uskorennogo vykhazhivaniya s primeneniem ustroystv dlya mikropodachi zagotovok. Diss. kand. tekhn. nauk [Increase in efficiency of flat pendular grinding by the accelerated nursing using devices for microgiving of workpieces]. Ulyanovsk, 2002. 208 p.
  9. Komanduri R., Hou Z.B. Thermal modeling of the metal cutting process – Part II: Temperature rise distribution due to frictional heat source at the tool-chip interface. International journal of Mechanical Sciences, 2001, vol. 43, no. 1, pp. 57–88.
  10. Carslow H.S., Jaeger J.C. Conduction of heat in solids. Oxford, Oxford University Press, 1959. 510 p.
  11. Jaeger J.C. Moving sources of heat and temperature at sliding contact. Journal and Proceeding of the Royal Society of NSW, 1942, vol. 76, pp. 203–224.
  12. Vetkasov N.I., Krupennikov O.G., Ulitin S.I. Study of the grinding process by composite wheels. Materialy Mezhdunar. nauch.-tekhn. konf. “Sovremennye napravleniya i perspektivy pazvitiya tekhnologiy obrabotki i oborudovaniya v mashinostroenii”. Sevastopol, Sevastopolskiy gos. universitet Publ., 2015, pp. 15–22.
  13. Vetkasov N.I., Krupennikov O.G., Ulitin S.I., Motlyakh Y.S. Modeling of power tension surface grinding composite community. Fundamentalnye i prikladnye problem tekhniki i tekhnologii, 2016, no.2, pp. 19–27.
  14. Krupennikov O.G., Ulitin S.I. Development of mathematical model of power intensity of process of grinding of procurements by abrasive wheels. Sbornik nauch. trudov I mezhdunar. zaoch. nauch.-tekhn. konf. “Tekhnologicheskoe obespechenie mashinostroitelnykh proizvodstv”. Chelyabinsk, YuUrGU Publ., 2014, pp. 551–555.
  15. Sizyy Yu.A., Stepanov M.S. Mathematical modeling of the temperature field in the ground procurement by the periphery of a wheel. Vostochnoevropeyskiy zhurnal peredovykh tekhnologiy, 2004, no. 2, pp. 52–63.
  16. Bobrovsky N.M., Vilchik V.A., Bokk V.V., Bobrovsky I.N. Distribution of temperature in burnishing with broad self-aligned gear. Izvestiya Samarskogo nauchnogo tsentra Rossiyskoy Akademii nauk, 2008, no. S6, pp. 22–29.
  17. Unyanin A.N. Nauchnoe i tekhnologicheskoe obespechenie shlifovaniya zagotovok i zplastichnykh staley i splavov s predotvrashcheniyem zasalivaniya abrazivnykh krugov. Diss. dokt. tekhn. nauk [Scientific and technological support of grinding of procurements from plastic steels and alloys with prevention of a brining of abrasive wheels]. Ulyanovsk, 2006. 503 p.
  18. Korchak S.N. Proizvoditelnost protsessa shlifovaniya stalnykh detaley [Productivity of process of grinding of steel details]. Moscow, Mashinostroenie Publ., 1974. 208 p.
  19. Maslov E.N. Teoriya shlifovaniya materialov [Theory of grinding materials]. Moscow, Mashinostroenie Publ., 1970. 320 p.
  20. Melnikov V.G., Alsabti H.A. Investigation of tribotechnical characterization of lubricating materials with the powdered additives. Sovremennye naukoemkie tekhnologii. Regionalnoe prilozhenie, 2007, no. 4, pp. 62–67.
  21. Khudobin L.V., ed. Smazochno-okhlazhdayushchie tekhnologicheskie sredstva i ikh primenenie pri obrabotke rezaniem [Lubricating-cooling process means and their application during cutting]. Moscow, Mashinostroenie Publ., 2006. 544 p.

Supplementary files

Supplementary Files
Action
1. JATS XML
Download

Copyright (c)



This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies