Журналы →  Chernye Metally →  2023 →  №11 →  Назад

80th anniversary of the dept. “Materials Processing and Additive Technologies” of Moscow Polytechnic University
Название Technological capabilities of the MTL-10G-1 testing machine
DOI 10.17580/chm.2023.11.09
Автор N. F. Shpunkin
Информация об авторе

Moscow Polytechnic University, Moscow, Russia

N. F. Shpunkin, Cand. Eng., Prof., Dept. of Materials Forming and Additive Technologies, e-mail: snf48@yandex.ru


The application region of the testing machine MTL-10G-1 is considered, provided in accordance with the technical documentation of the manufacturer and consisting in conducting a standard test of thin-sheet metals by the Eriksen method. It is noted that the technological capabilities of the machine are not limited to this type of testing, but can be used to perform various types of investigation of the sheet materials’ properties. Such possibilities are due to the fact that, according to the principle of operation, the machine is a double-acting press, and the experimental equipment installed on the machine can perform clamping and plastic deformation of sheet metal. This paper considers the possibilities of using the machine to conduct various types of tests that differ from the Eriksen method (a test for biaxial tension with preservation of flatness in the test area, a test for torsion of a sheet specimen in its plane, etc.). The experience of using the machine for experimental investigations of the behavior of sheet materials in various sheet stamping operations, such as forming, drawing and stretching, is presented. The possible region of application of the machine for testing and debugging the production technologies for stamping, the basis of which is the operation of extraction, is indicated. The machine’s capabilities provide testing to evaluate and refine the plastic properties of sheet metals. With the use of special test equipment, experimental data can be obtained to construct a diagram of extreme deformations, which is the most important characteristic used to predict the destruction of a stamped sheet blank. This characteristic determines the ratio of deformations occurring in the sheet, at which destruction occurs. This knowledge is especially important for new types of deformable sheet steels of increased strength, mastered by the metallurgical industry.

Ключевые слова Testing machine, sheet materials, technological capabilities, forming, drawing, stretching, experimental equipment, diagram of ultimate deformations
Библиографический список

1. Device for testing sheet metal for extrusion, model MTL-10G-1. Technical description and operating instructions. GB 2.778.006TS. Ivanovo plant "Tochpribor", 1975.
2. GOST 10510–80. Metals. Eriksen test method for sheets and strips extrusion. Introduced: 01.07.1980.
3. GOST R ISO 20482–2015. Metallic materials. Sheets and strips. Eriksen cupping test. Introduced: 01.01.2016.
4. GOST 9045–93. Cold-rolled thin sheets of low-carbon steel for cold stamping. Specifications. Introduced: 01.01.1997.
5. GOST 16523–97. Rolled sheets from quality and ordinary carbon steel for general purposes. Introduced: 01.01.2000.
6. Marciniak Z., Kuczynski K. Limit strains in the processes of stretch-forming sheet metal. International Journal of Mechanical Sciences. 1967. Vol. 9. No. 9. pp. 609–620.
7. Banabic D. Sheet metal forming processes. Constitutive modelling and numerical simulation. Berlin, Heidelberg : Springer Verlag, 2010. 318 p.
8. Park N., Huh H., Yoon J. W. Anisotropic fracture forming limit diagram considering nondirectionality of the equi-biaxial fracture strain. International Journal of Solids and Structures. 2018. Vol. 151. pp. 181–194.
9. Demin V. A. Study of the relationship between the limiting drawing ratio and the formability group of steel for cold stamping. Izvestiya Tulskogo gosudarstvennogo universiteta. Tekhnicheskie nauki. 2017. No. 12-2. pp. 262–268.
10. Chaimongkon T., Panich S., Uthaisangsuk V. Anisotropic fracture forming limit curve and its applications for sheet metal forming with complex strain paths of aluminum sheet. The International Journal of Advanced Manufacturing Technology. 2021. Vol. 115. pp. 3553–3577.
11. Keller I. E., Petukhov D. S., Kazantsev A. V., Trofimov V. N. Diagram of limiting deformations during hot sheet metal stamping. Review of material models, ductile fracture criteria and standard tests. Vestnik Samarskogo gosudarstvennogo tekhnicheskogo universiteta. Seriya: Fiziko-matematicheskie nauki. 2018. Vol. 22. No. 3. pp. 447–486.
12. Hajian M., Assempour A. Experimental and numerical determination of forming limit diagram for 1010 steel sheet: a crystal plasticity approach. The International Journal of Advanced Manufacturing Technology. 2015. Vol. 76. pp. 1757–1767.
13. Pimenov V. A., Lukin A. S., Orekhov M. E., Sigorskikh A. V., Shkatov M. I. Features of production of cold-rolled high-strength rolled products at Novolipetsk Integrated Metallurgical Works. Chernye Metally. 2012. No. 5. pp. 10–15.
14. Charoensuk K., Panich S., Uthaisangsuk V. Damage initiation and fracture loci for advanced high strength steel sheets taking into account anisotropic behavior. Journal of Materials Processing Technology. 2017. Vol. 248. pp. 218–235.
15. Chen W., Song H., Lazarescu L., Xu Y. et al. Formability analysis of hot-rolled dual-phase steel during the multistage stamping process of wheel disc. The International Journal of Advanced Manufacturing Technology. 2020. Vol. 110. pp. 1563–1573.
16. Shinkin V. N. Preliminary straightening of steel strip. Chernye Metally. 2018. No. 5. pp. 34–40.
17. Matveev A. D. Testing sheet metal for axisymmetric tension. Kuznechno-shtampovochnoe proizvodstvo. 1971. No. 10. pp. 14–17.
18. Shinkin V. N. Springback coefficient of round steel beam under elastoplastic torsion. CIS Iron and Steel Review. 2018. Vol. 15. pp. 23–27.
19. Filippov Yu. K., Molodov A. V., Zaitsev A. G., Evsikov R. A. Biaxial tensile testing of samples. Izvestiya Tulskogo gosudarstvennogo universiteta. Tekhnicheskie nauki. 2014. No. 10-2. pp. 97–103.
20. ISO 12004-2:2021. Metallic materials – Determination of forming-limit curves for sheet and strip – Part 2: Determination of forming-limit curves in the laboratory. – Introdeced: 10.02.2021.
21. Inventor's certificate No. 800806. Device for biaxial extension of sheet material. A. D. Matveev, A. G. Bobrov et al. Applied: 27.04.1979. Published: 30.01.1981.
22. Inventor's certificate No. 1278668. Testing method for flat biaxial extension of sheet material. A. D. Matveev, N. F. Shpunkin et al. Applied: 30.09.1985. Published: 23.12.1986.
23. Marciniak Z., Kuczinski K., Kolodziejski J. Wyznaczanie niektorych plastecznych wlasnosci blachy metoda skrecania. Obrobka Plastyczna. 1973. Vol. 12. No. 2. pp. 61–65.
24. Shpunkin N. F., Tipalin S. A. Device testing specimens of sheet materials for twisting in plane of sheet. Patent RF No. 2202777. Applied: 20.04.2001. Published: 20.04.2003.
25. Shinkin V. N. Direct and inverse non-linear approximation of hardening zone of steel. Chernye Metally. 2019. No. 3. pp. 32–37.
26. Shpunkin N. F., Tipalin S. A., Nikitin M. Yu. Sheet damping material for body parts. Shear properties. Avtomobilnaya promyshlennost. 2010. No. 10. pp. 39–40.
27. Tipalin S. A., Nikitin M. J., Shpunkin N. F. Experimental study of V-bending process of steelpolymer-steel sheets at room temperature. Computer Methods in Materials Science. 2008. Vol. 8. No. 3. pp. 138–143.
28. Shpunkin N. F., Tipalin S. A. Study of properties of multilayer sheet materials. Zagotovitelnye proizvodstva v mashinostroenii. 2013. No. 1. pp. 28–31.
29. Feofanova A. E. Limiting deformations during local sheet forming. Metal forming processes: Interuniversity collection of scientific papers. Moscow : MAMI, 1988. pp. 145–152.
30. Nakazima K., Kikuma T. Forming limits under biaxial stretching of sheet metals. Testu-to-Hagane. 1967. Vol. 53. pp. 455–458.
31. Lumelskyy D., Rojek J., Banabic D., Lazarescu L. Detection of Strain Localization in Nakazima Formability Test – Experimental Research and Numerical Simulation. Procedia Engineering. 2017. Vol. 183. pp. 89–94.
32. Ayachi N., Guermazi N., Pham C. H., Manach P. Y. Development of a Nakazima test suitable for determining the formability of ultra-thin copper sheets. Metals. 2020. Vol. 10. No. 9. pp. 1163–1181.
33. Shpunkin N. F. Methods for improving stamping auto body parts with stretch-wrap forming and determination the stampability of a sheet. Dissertation … of Candidate of Engineering Sciences. Moscow : MAMI, 1981.
34. Tipalin S. A., Belousov V. B., Shpunkin N. F. Modeling of stretch-wrap forming of sheet metal. Izvestiya Tulskogo gosudarstvennogo universiteta. Tekhnicheskie nauki. 2019. No. 12. pp. 180–183.
35. Melnikov E. L. Handbook for cold stamping of shell parts. Moscow : Mashinostroenie, 2003. 288 p.

Language of full-text русский
Полный текст статьи Получить