Abstract
The methodology and results of experimental study by Sachs method of residual stresses in thick-walled cylinders of steel grade 45 (0.45% C) with 5 mm diameter hole, outer diameter of 15 mm, height of 50 mm after compression and tension mandrelling, which is performed with allowances that ensure high accuracy of the mandrelled holes are presented in the article.
It is found that the transition from the compression configuration to the tension one increases axial and radial residual strains and reduces hoop residual strains on the surface of the hole and outer surface of the cylinder, and increases the largest in absolute value residual stresses in these areas: hoop stresses – from 285 to 320 MPa; radial stresses – from 105 to 115 MPa; axial stresses – from 20 to 60 MPa.
It is shown that the nature of the residual stress distribution in cylinders does not depend on the mandrelling configuration.
Keywords: mandrelling, compression and tension configurations, thick-walled cylinders, residual stresses.
References
1. Proskuryakov Yu.G. Dornovanie otverstii [Mandrelling holes]. Sverdlovsk, Mashgiz Publ., 1961. 192 p.
2. Proskuryakov Yu.G. Tekhnologiya uprochnyayushche-kalibruyushchei i formoobrazuyushchei obrabotki metallov [Technology of strength-calibrating and forming metal]. Moscow, Mashinostroenie Publ., 1971. 208 p.
3. Brondz L.D. Tekhnologiya i obespechenie resursa samoletov [Technology and providing resource of aircraft]. Moscow, Mashinostroenie Publ., 1986. 184 p.
4. Rozenberg A.M., Rozenberg O.A. Mekhanika plasticheskogo deformirovaniya v protsessakh rezaniya i deformiruyushchego protyagivaniya [Mechanics of plastic deformation in the process of cutting and pulling the deforming]. Kiev, Naukova dumka Publ., 1990. 320 p.
5. Rozenberg A.M., Rozenberg O.A., Gritsenko E.I., Posvyatenko E.K. Kachestvo poverkhnosti, obrabotannoi deformiruyushchim protyagivaniem [Quality of treated surface deforming pulling]. Kiev, Naukova dumka Publ., 1977. 187 p.
6. Proskuryakov Yu.G., Romanov V.N., Isaev A.N. Ob"emnoe dornovanie otverstii [Volume mandrelling holes]. Moscow, Mashinostroenie Publ., 1984. 224 p.
7. Monchenko V.P. Effektivnaya tekhnologiya proizvodstva polykh tsilindrov [Effective technology for the production of hollow cylinders]. Moscow, Mashinostroenie Publ., 1980. 248 p.
8. Proskuryakov Yu.G., Isaev A.N., Popov L.V., Valyaev F.F. Ostatochnye napryazheniya i tochnost' detalei, obrabotannykh dornovaniem [Residual stresses and accuracy parts treated mandrelling]. Vestnik Mashinostroeniya – Russian Engineering Research, 1973, no. 7, pp. 57-60 (in Russian).
9. Ambrosimov S.K., Afonin A.N., Ingemansson A.R., Isaev A.N., Kirichek A.V., Krainev D.V., Lebedev A.R., Makarov V.F., Morozova A.V., Norchenko P.A., Polyanchikov Yu.N., Solov'ev D.L. Effektivnye tekhnologii dornovaniya, protyagivaniya i deformiruyushche-rezhushchei obrabotki [Efficient technologies mandrelling, pulling and cutting-deforming processing]. Moscow, Spektr Publ., 2011. 328 p.
10. Okhotin I.S., Skvortsov V.F. Dornovanie glubokikh otverstii malogo diametra s bol'shimi natiagami [Mandrelling deep small holes with big tightness]. Germany, LAP LAMBERT Acad. Publ., 2011. 170 p.
11. Skvortsov V.F., Okhotin I.S., Arlyapov A.Yu. Ostatochnye napryazheniya pri dornovanii otverstii malogo diametra s bol'shimi natyagami [Residual stresses at mandrelling small holes with big tightness]. Izvestiia Tomskogo politekhnicheskogo universiteta – Bulletin of the Tomsk Polytechnic University, 2010, vol. 316, no. 2, pp. 24-27 (in Russian).
12. Skvortsov V.F., Gol'dshmidt M.G., Shul'gin M.M., Fedotov V.S. [Experimental evaluation of residual stresses in thick-walled workpieces formed with single-cycle burnishing with big tightness]. Sbornik nauchnykh trudov VII Mezhdunarodnoi nauchno-tekhnicheskoi konferentsii “Sovremennye problemy mashinostroeniya” [Proceedings of the VII International Scientific and Technical Conference "Modern Problems of Engineering"]. Tomsk, TPU Publ., 2013, pp. 357-361.
13. Skvortsov V.F., Arlyapov A.Yu., Okhotin I.S. Dornovanie glubokikh otverstii malogo diametra [Small diameter deep hole mandrelling]. Spravochnik. Inzhenernyi zhurnal – Handbook. An Engineering Journal, 2012, no. 2, appendix, pp. 1-24.
14. Birger I.A. Ostatochnye napryazheniya [Residual Stresses]. Moscow, Mashgiz Publ., 1963. 232 p.
15. Vishnyakov Ya.D., Piskarev V.D. Upravlenie ostatochnymi napryazheniyami v metallakh i splavakh [Control residual stresses in metals and alloys]. Moscow, Metallurgiya Publ., 1989. 254 p.