Journals →  Chernye Metally →  2022 →  #6 →  Back

Rolling and other OMD processes
ArticleName Theoretical study of the accuracy of the height dimensions of forgings for upsetting and closed forging operations, taking into account the choice of forging and pressing equipment
DOI 10.17580/chm.2022.06.06
ArticleAuthor S. V. Matveev, A. G. Vyatkin, A. A. Vyatkin, I. A. Kh. Davi

Kaluga Branch of Bauman Moscow State Technical University, Kaluga, Russia:

S. V. Matveev, Cand. Eng., Associate Professor, Dept. M1-KF "Machine-Building Technologies", e-mail:

A. G. Vyatkin, Cand. Eng., Associate Professor, Dept. M1-KF "Machine-Building Technologies"
I. A. Kh. Davi, Student, Dept. M1-KF "Machine-building technologies"

Kaluga Technical College, Kaluga, Russia:

A. A. Vyatkin, Lecturer


The use of low-waste technologies in blank production in the process of performing cold die forging (CDF) operations involves the use of various types of presses, such as crank, hydraulic and screw ones. The range of forging and pressing equipment is quite wide, so the problem of rational use of a particular type of press always arises. Any press must provide the necessary force to deform the original workpiece. Technological processes of metal forming are accompanied by high specific forces of resistance to deformation of materials, which is realized by the design features of the working link of forging and pressing equipment. It should be noted that one of the most important criteria influencing the choice of a press for performing CDF operations is the achievable accuracy of stamped forgings. Taking into account the design features of the types of presses, there are significant differences between them. These differences will be determined by the forging deformation conditions. The performed analytical calculation of error conversion coefficients for forgings during CDF operations makes it possible to evaluate the influence of the factors of the original workpiece on the accuracy of the height dimensions of the forging itself. The obtained graphic dependences for crank, hydraulic and screw presses show the relationship of conversion factors depending on the initial errors of the forgings and the rigidity of the forging itself to the accuracy of height dimensions. As a rule, the rigidity of a forging is determined by the ratio of diameter and height for the upsetting operation, but in the case of a closed forging, the radius at the edges must be taken into account. The article is devoted to a theoretical study of the height error of forgings for the operation of upsetting and closed forging, taking into account the used forging and pressing equipment.

keywords Cold die forging, error, rigidity, accuracy of forgings, press

1. Lanskoy Е. N., Antonyuk F. I. Influence of rigidity of a crank press on the accuracy of cold forging in closed dies. Kuznechno-shtampovochnoe mashinostroenie. Moscow: Nauchnoissledovateskiy institut mashinostroeniya, 1975. pp. 7–11.
2. Antonyuk F. I. Analysis and provision of high accuracy of cold die forging in presses by a scientifically based choice of the rigidity of the technological system elements. Dissertation … of Doctor of Engineering Sciences. Moscow: MGTU imeni N. E. Baumana, 2004. 450 p.
3. Atroshenko А. P., Fedorov V. I. Metal-saving technologies of forging and stamping production. Leningrad: Mashinostroenie. Leningradskoe otdelenie, 1990. 279 p.
4. Bariani P. F., Ghiotti A. Evaluating of press stiffness in realistic operation conditions. Cluj-Napoca: 8th ESAFORM Conference. 2005. 390 p.
5. Romanovskiy V. P. Cold Stamping Handbook. Leningrad: Mashinostroenie, 1979. 520 p.
6. Altan T., Oh S., Gegel H. Metal Forming. Fundamentals and applications. Ohio: American Society for metals, Metals Park, 1983. 353 p.
7. Nam S. W., Bae G. H. Study on the cold stamping process design method of 1.5 GPa grade front side rear lower member. Transactions of Materials Processing. 2021. Vol. 30. No. 5. pp. 236–241.
8. Long Li, Li Yan, Yang Mingshun, Chen Xin, Li Jiawei. Effects of mass scaling on finite element simulation of the cold roll-beating forming process. IOP Conference Series: Materials Science and Engineering. 2019. Vol. 490. No. 5. p. 052019.
9. Sivam S. P. S. S., Umasekar V. G., Mishra A., Mishra S., Mondal A. Orbital cold forming technology-combining high quality forming with cost effectiveness-A review. Indian Journal of Science and Technology. 2016. Vol. 9, Iss. 38. pp. 1–7.
10. Lundin J. Design of cold stamped parts using results of simplified cold stamping analysis in crash simulations. Pepartnunt of Engineering Science and Mathematics. 2020. p. 51.
11. Devanathan R., Murali V. Numerical simulation of orbital cold forging of a bevel gear. International Journal of Innovative Research in Science, Engineering and Technology. 2015. Vol. 4. No. 4. pp. 191–197.
12. Vyatkin А. G., Matveev S. V. Upsetting accuracy when stamping on a screw press. Zagotovitelnye proizvodstva v mashinostroenii. 2013. No. 7. pp. 22–25.
13. Vyatkin А. G., Vyatkin A. A., Matveev S. V. The accuracy of the operation of closed stamping on a screw press. Zagotovitelnye proizvodstva v mashinostroenii. 2015. No. 9. pp. 17–20.
14. Vyatkin А. G., Matveev S. V. Comparative assessment of the influence of factors on the accuracy of height dimensions of forgings produced on screw and crank presses. Izvestiya MGTU «МАМI». 2010. No. 2. pp. 111–116.
15. Lanskoy Е. N., Antonyuk F. I., Vyatkin А. G. Accuracy of forgings produced by cold stamping on crank and hydraulic presses. Kuznechno-shtampovochnoe proizvodstvo. Obrabotka metallov davleniem. 2002. No. 1. pp. 25–29.
16. Antonyuk F. I., Zenkina I. А., Kuznetsov V. I. Increasing the accuracy of diametrical dimensions ofcylindrical forgings during cold upsetting. Fundamentalnye issledovaniya. 2017. No. 2. pp. 9–15.

Language of full-text russian
Full content Buy