The Analysis of Destruction of Abrasive Grains During the Grinding of Wood and Wood Materials

Complete text of the article:

Download article (pdf, 0.4MB )

UDС

674. 055

DOI:

10.17238/issn0536-1036.2015.5.117

Abstract

Grinding is carried out for the purpose of abrasion of a surface after the previous operations and of attaching he demanded roughness, and also removal of a layer of wood or wood material by it for providing the given size of a product. Studying and definition of the surface energy of wood and wood materials are actual problems of the modern woodworking, connected to formation of new surfaces as a result of technological processes. The studied processing of details by abrasive tools according to the description and model operation is the most composite. They are characterized by developed existential communications which detailed studying has to be carried out on the basis of systems approach. Regularities of a wear of the abrasive tool are directly connected with work of simple abrasive grains. The phenomenon of adhesion, diffusion, abrasive destruction, plastic flow of the shallowest surface layers softened under the influence of high contact temperatures and pressure, chemical impact on an abrasive of a surrounding medium and the processed material are fundamentally of the mechanism of a wear. Under the influence of mechanical and temperature stresses there is a cracking fissuring, shear of trimming blades, microchipping from a linking of separate abrasive grains and the whole complexes. The probability of an evulsion of abrasive grain and its destructions with increase in depth of cutting considerably increases in the tool. In this case almost all abrasive grains reach the maximal depth of cutting. At tops of abrasive grains there are considerable platforms of a wear. On the basis of the analysis of regularities of work of simple abrasive grains of the tool from the moment of their activation until destruction or an evulsion from a sheaf it is possible to establish interrelation of a wear of the abrasive tool with a wear and regularities of work of simple abrasive grains that is an integral part of possibility of perfecting of designs of the tool.

Authors

A.V. Sergeevichev, Candidate of Engineering, Associate Professor

Affiliation

St. Petersburg state forest technical university under name of S. M. Kirov, Institutsky per., 5, St. Petersburg, 193232, Russia; e-mail: 910sav@gmail.com

Keywords

grinding of wood and wood materials, a roughness of the processed surface, cutting, simple abrasive grain.

References

. Korolev A.V. Issledovanie protsessov obrazovaniya poverkhnostey instrumentov i detali pri abrazivnoy obrabotke [Research of Processes of Formation of Tools and a Detail Surfaces at Abrasive Processing]. Saratov, 1975. 202 p. 2. Lyubimov V.G. Rezhushchie svoystva odinochnogo abrazivnogo zerna i shlifo-val'nogo kruga [The Cutting Properties of Individual Abrasive Grain and an Abrasive Disk]. Lesnoy zhurnal, 1974, no. 5, pp. 79–87. 3. Novoselov Yu.K. Dinamika formoobrazovaniya poverkhnostey pri abrazivnoy obrabotke [Dinamics of a Surfaces Formation at Abrasive Processing]. Sevastopol, 2012. 304 p. 4. Novoselov Yu.K. Optimizatsiya protsessov shlifovaniya detaley [Optimization of Processes of Grinding of Details]. Tekhnologiya i organizatsiya proizvodstva, Kiev, 1975, no. 8, pp. 31–34. 5. Reznikov A.N. Abrazivnaya i almaznaya obrabotka materialov [Abrasive and Di-amond Processing of Materials]. Moscow, 1977. 391 p. 6. Rybin B.M., Sanaev V.G., Kirillov D.V. K voprosu vybora parametrov shero-khovatosti dlya otsenki nerovnostey drevesiny [To a Question of a Choice of Parameters of a Roughness for an Assessment of Wood Roughnesses]. Lesnoy vestnik, Moscow, 2014, no. 4, pp. 131–137. 7. Sergeevichev A.V. Osnovnye kharakteristiki protsessa shlifovaniya drevesiny i drevesnykh materialov [Main Characteristics of Grinding Process of Wood and Wood Materials]. Izvestiya SPbFTU, St. Petersburg, 2014, no. 206, pp. 124–138. 8. Fedoseev O.B. Teoreticheskie i eksperimental'nye issledovaniya protsessa shlifo-vaniya sverkhtverdymi materialami: avtoref. dis. … kand. tekhn. nauk [Theoretical and Pilot Studies of Process of Grinding by Supersolid Materials: Cand.Tech.Sci.Diss.Abs.]. Tbilisi, 1976. 24 p. 9. Daude O. Zusammenhang zwischen Shleifscheibe. Bearbeitungsbedingungen und arbeitsergebnis beim schleifen. Jnd.-Anz, 1969, no. 32, pp. 741–745. 10. Gerner L.H., Burk R.E., Grummitt O. in Frontiers in Chemistry. Interscience. New York, 1962, no. 4, pp. 57–65. 11. Matsui S., Tamaki I. Influence of the elastic displacement of grain cutting edges on grinding mechanism. Technology Reports. Tohoky Univ, 1976, no. 41, pp. 73–88. 12. Tanaka Y. Frictional properties of abrasive grains. Technology Reports. Osaka Univ., 1967, no. 17, pp. 523–531.