Pervouralsk New Tube (Novotrubny) Works (Pervpuralsk, Russia):

I. N. Bazhukov, e-mail: ivan.bazhukov@chelpipe.ru
An. V. Serebryakov, Cand. Eng., e-mail: andrey.serebryakov@chelpipe.ru

Ural Federal University (Ekaterinburg, Russia):
Al. V. Serebryakov, Cand. Eng., e-mail: ntt@pervouralsk.ru
S. I. Parshakov, Cand. Eng., e-mail: spi@eka-net.ru

The problem of distortion of the measurement results of the outer diameter of extra-thin-walled tubes caused by the elastic deformation of tubes from the clamping force of the micrometer was estimated. The analysis of known solutions for estimating the value of elastic deformation of thin-walled cylindrical products under the action of concentrated radial loads is carried out. An experimental estimation of the error during measuring the diameter of thin-walled tubes as a function of the clamping force of the micrometer is made. The generalized formula for calculating the error value has been obtained theoretically. It is established that, for a certain range of thin-walled tubes, the elastic distortion of the diameter due to tube ovalization from the clamping force of the micrometer introduces an error in the result that exceeds the permissible values in accordance with the GOST 8.051-81. Based on the results of the work, the boundaries of applicability of the method for measuring the diameter of extra-thin-walled pipes by micrometers has determined and presented by the nomogram, depending on the tube dimensions, diameter allowable deviations and requirements of GOST 8.051-81.

1. Technical specification 14-159-293–2005. Seamless exceptionally thin tubes from corrosion-resistant steel 06Kh16N15М3B-ID (type EI 847-ID) [Text]. Introduced: 2005-07-01. Reissued in 2017. Pervouralsk: JSC «PNTZ», 2017. p. 38.
2. Serebryakov An. V. et. al. Increase of accuracy and quality of surface of stainless steel pipes for nuclear industry. Chernye metally. 2012. No. 4. pp. 16–20.
3. Serebryakov A. V. Study, development of the technology and launching the production of precision tubes from corrosion-resistant steel: Dissertation … of Candidate of Engineering Sciences; 05.16.05 Yekaterinburg, 2007. p. 160.
4. GOST 6507–90. Micrometers. Specifications. Introduced: 1991-01-01. Moscow: IPK Izdatelstvo standartov, 2004. 12 p.
5. GOST 24851–81. Plain gauges for cylindrical holes and shafts. Types. Introduced: 1982-01-01. Moscow: Izdatelstvo standartov, 1981. 12 p.
6. GOST 24853–81. Plain gauges for dimensions to 500 mm. Tolerances. Introduced: 1983-01-01. Moscow: PK Izdatelstvo standartov, 2003. p. 10.
7. Glukhov V. I., Martemyanov D. B. Instrument accuracy for measurement of geometrical characteristics of parts: Tutorial. Omsk: Izdatelstvo OmGTU, 2014. 108 p.
8. Korsakov V. S. Machining accuracy. Moscow: MASHGIZ, 1961. 380 p.
9. Potapov A. Yu., Nazarenko Yu. B. Method for elimination of slippage of intershaft bearing rolls using ovalization of bearing ring during exploitation. Dvigatel. 2012. No. 4(82). pp. 8–11.
10. Letkin A. M. et al. Ultimate ovalization forces acting on tube crosssection during straightening. Suchasni problemi metalurgii. 2008. Vol. 11. pp. 328–332.
11. Agamirov V. L. et. al. Reference book for a machine builder. In 6 volumes. Vol. 3 / edited by Serensen S. V. 3rd revised and supplemented publication. Moscow: MASHGIZ, 1962. 654 p.
12. Machining accessories. Reference book. In 2 volumes. Vol. 1 / edited by Vardashkin B. N., Shatilov А. А. Moscow: Mashinostroenie,
1984. 592 p.13. Gozarchi S. F. Comparison of deflection measurement methods of large diameter steel pipes with control low strength material. 2014. Mode of access: uta-ir.tdl.org/uta-ir/bitstream/handle/10106/24487/FarrokhiGozarchi_uta_2502M_12736.pdf
14. Al-Muslim H. M., Arif A. F. M. Investigation and validation of finite element analysis material modeling for integrity assessment of indented pipe under static and cyclic loading. Journal of Pressure Vessel Technology. 2013. Vol. p.135(2).
15. Madureira L. R., F. Q. Melo. Deformation of thin straight pipes under concentrated forces or prescribed edge displacements. Mechanics Research Communications. 2015. Vol. 70. pp. 79–84.
16. Timoshenko S., Woinowsky-Krieger S. Theory of plates and shells. 2^nd ed. New York : McGRAW-HILL BOOK COMPANY, 1969. 580 p.
17. GOST 10498–82. Especially thin-walled seamless tubes of corrosion-resistant steel. Specifications. Introduced:1983-07-01. Moscow: Izdatelstvo standartov, 1983. 6 p.
18. Technical specification 14-3-1070–81. Seamless exceptionally thin tubes from corrosion-resistant austenitic steels. Introduced: 1982-06-01. Reissued in 2011. Chelyabinsk: ТК357, 2011. 25 p.
19. GOST 8.051–81. State system for ensuring the uniformity of measurements. Permissible errors of linear dimensions to 500 mm measurement. Introduced: 1982-01-01. Moscow: Izdatelstvo standartov, 1987. 10 p.