Abstract
In this paper, a kind of mathematic method for optimizing stretching process of large forgings is proposed. Distributions of effective strain within forged ingots is described by a Gauss function, which is obtained from the simulation of flat-anvil stretching process. Successive stretching is expressed by the superimposing Gauss functions. Optimized stretching process, with both homogeneous and certain strain in the center of forgings, is presented by derivation of this function. The relationship between effective strain and the values of feed is obtained during the successive stretching with a rotation angle of 90° and a feed displacement of 1/2 anvil width. The optimization result is verified by finite element simulation. Optimized value of feed obtained using this method can ensure both uniformity and forging penetration. It provides mathematic model and theoretic basis of optimizing large forging stretching process.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Wistreich J G. Theoretical analysis of bloom and billet forging [J]. The Journal of the iron and steel institute, 1999, 12(1): 163–176.
Liu Zhu-bai. Theory of stretching a blank with rectangular cross section between flat tools [C]// Proc 12th International Forgemasters Meeting. Chicago, USA: Forging Industry Education and Research Foundation, 1994: 11–17.
Wang Lei-gang, Liu Zhu-bai, Deng Dong-mei. Three dimensional finite-element simulation of stretching technological parameters w/h and b/h of heavy forgings [C]// Proc 14th International Forgemasters Meeting. Wiesbaden, Germany: Forging Industry Education and Research Foundation, 2000: 3–8.
Ono S, Tanaka M, Tsukada H, et al. Analysis on distribution of deformation during hot forging [J]. Advanced Technology of Plasticity, 2001, 2(4): 132–139.
Banaszek G, Szota P. A comprehensive numerical analysis of the effect of relative feed during the operation of stretch forging of large ingots in profiled anvils [j]. Journal of Materials Processing Technology, 2005, 169(3): 437–444.
Banaszek G, Stefanik A. Theoretical and laboratory modeling of the closure of metallurgical defect during forming of a forging [J]. Journal of Materials Processing Technology, 2006, 177(3): 238–242.
Sinczak J, Malinowski Z, Szczepaniak S. No homogeneity deformation during forging [J]. Metal Foundry Engineering, 1992, 18(5): 35–45.
Wang Zu-tang, Ren Meng. Research on void closure in large forgings and the optimization of process [J]. Chinese Journal of Mechanical Engineering, 1991, 2(6): 7–9 (in Chinese).
Morihiko N, Ichiro T, Hiroshi U. Application of hydrostatic integration parameter for free-forging and rolling [J]. Journal of Materials Processing Technology, 2006, 177(3): 195–200.
Li Yao. Metal plasticity forming theory [M]. Beijing: Machine Industry Press, 2004 (in Chinese).
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: the National Science Support Project found by the Ministry of Science and Technology of China (No. 2007BAE51B04)
Rights and permissions
About this article
Cite this article
Chen, K., Yang, Yt., Shao, Gj. et al. Simulation of large forging flat-anvil stretching process and its optimization. J. Shanghai Jiaotong Univ. (Sci.) 16, 199–202 (2011). https://doi.org/10.1007/s12204-011-1121-8
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12204-011-1121-8