Development of recommendations for computer-aided design of profiled upsetting workpieces

Authors

  • О. E. Markov Donbass State Engineering Academy, Kramatorsk, Ukraine https://orcid.org/0000-0001-9377-9866
  • V. N. Zlygorev Donbass State Engineering Academy, Kramatorsk, Ukraine
  • О. V. Gerasimenko Donbass State Engineering Academy, Kramatorsk,
  • V. V. Panov Donbass State Engineering Academy, Kramatorsk, Ukraine
  • R. Yu. Zhytnikov Donbass State Engineering Academy, Kramatorsk, Ukraine
  • U. O. Ivanova Donbass State Engineering Academy, Kramatorsk, Ukraine

DOI:

https://doi.org/10.20535/2521-1943.2019.86.181050

Keywords:

protrusions, upsetting operation, stress state, axial porosity, high-quality products

Abstract

Abstract. A method of forging billets has been proposed, which consists in the upsetting of profiled ingots. A technique has been proposed for a theoretical study of the dependencies of axial porosity size reduction in workpieces based on finite element modeling. The baseline for the study was the height of the protrusions of the four-beam workpieces. The height of the protrusions of the four-beam workpieces varied in the range of 0.75; 0.80 and 0.85. The angle of the protrusions of the four-beam workpieces was 115°. Based on the finite-element studies, average stresses has been established during the upsetting of shaped ingots. Based on this parameter, the stress state parameter was set in the central part of the forging. The proposed technique of conducting experiments. The experiments were carried out on models of lead and steel. As a result of the finite element modeling, it was determined that the rational relative height of the protrusions is 0.85. This ratio leads to a maximum decrease in the size of the axial porosity. This can be explained by the significant amount of compressive average stresses during the upsetting of profiled workpieces. A rational amount of compression is determined when the maximum reduction in the size of the axial porosity takes place. The average stresses in the forging volume and the change in the stress state parameter of an upsetting profiled workpieces are determined. The closure of the axial porosity has been proven by experiments on lead and steel models. The proposed method of deforming four-beam profiled workpieces has been introduced. Analysis of the USC results made it possible to determine that the manufactured products lack axial voids that exceed customer requirements. As a result, the expediency of the operation of the profiled ingots upsetting was established, which made it possible to increase the density of the internal structure of large-sized workpieces.

References

  1. Banaszek, G. and Stefanik, A. (2006), “Theoretical and laboratory modelling of the closure of metallurgical defects”, J. Mater. Proc. Technol., no. 177, pp. 238 – 242.
  2. Scarabello, D., Ghiotti, A. and Bruschi, S. (2010), “FE modelling of large ingot hot forging”, Int. J. of Mater. Form., no. 3, pp. 335 –338.
  3. Chenot, J.-L., Fourment, L., Ducloux, R. and Wey, E. (2011), “Finite element modelling of forging and other metal forming processe”, Int. J. of Mater. Form., no. 3, pp. 359 – 362.
  4. Skubisz, P., Łukaszek-Sołek, A., Kowalski J. and Sińczak, J. (2008), “Closing the internal discontinuities of ingots in open die forging, Steel Research International, no. 79, pp. 555 – 562.
  5. Meng, F., Labergere, C. and Lafon, P. (2010), “Methodology of the shape optimization of forging dies”, Int. J. of Mater. Form., no. 3, pp. 927 – 930.
  6. Nowak, J., Madej, L., Grosman, F. and Pietrzyk, M. (2010), “Material flow analysis in the incremetal forging technology”, Int. J. of Mater. Form., no. 3, pp. 931 – 934.
  7. Park, C.Y. and Yang, D.Y. (1998), “A study of void crushing in large forgings”, J. Mater. Proc. Technol., no. 57, pp. 129 – 140.
  8. Kim, Y., Cho, J. and Bae W. (2011), “Efficient forging process to improve the closing effect of the inner void on an ultra-large ingot”, J. Mater. Proc. Technol., no. 211, pp. 1005 – 1013.
  9. Turin, V.A. (1977), “Some methods for quality control of large ingots”, Forging and stamping production, no. 11, pp. 35 – 39.
  10. Valberg, H.S. (2010), Applied Metal Forming, CUP, Cambridge.
  11. Markov, O., Kosilov, M., Panov, V., Kukhar, V., Karnaukh, S., Ragulina, N., Bochanov, P. and Rizak, P. (2019), “Modeling and improvement of saddling a stepped hollow workpiece with a profiled tool”, Eastern-European Journal of Enterprise Technologies, vol. 6/1(102), pp.19 – 25. https://doi.org/10.15587/1729-4061.2019.183663
  12. Markov, O., Gerasimenko, O., Aliieva, L., Shapoval, A. and Kosilov, M. (2019), “Development of a new process for expanding stepped tapered rings”, Eastern-European Journal of Enterprise Technologies, 2/1(98), pp. 39 – 46. http://doi.org/10.15587/1729-4061.2019.160395
  13. Markov, O., Gerasimenko, O., Khvashchynskyi, А., Zhytnikov, R. and Puzyr, R. (2019), “Modeling the techological process of pipe forging without a mandrel”, Eastern-European Journal of Enterprise Technologies, 3/1(99), pp. 42 – 48. http://doi.org/10.15587/1729-4061.2019.167077
  14. Markov, O., Gerasimenko, O., Aliieva, L. and Shapoval, A. (2019), “Development of the metal rheology model of high-temperature deformation for modeling by finite element method”, EUREKA: Physics and Engineering, no. 2, pp. 52 – 60.
  15. https://doi.org/10.21303/2461-4262.2019.00877

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Published

2019-11-26

How to Cite

[1]
Markov О. E., V. N. Zlygorev, Gerasimenko О. V., V. V. Panov, R. Y. Zhytnikov, and U. O. Ivanova, “Development of recommendations for computer-aided design of profiled upsetting workpieces”, Mech. Adv. Technol., no. 2(86), pp. 118–124, Nov. 2019.

Issue

No. 2(86) (2019)

Section

Up-to-date machines and the technologies of mechanical engineering

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