Rigid-plastic finite element analysis of plane strain ring rolling

2010

J Mech Sci Technol

Ring rolling is an advanced plastic forming technique which is used to manufacture precise seamless rings. Rolling ratio is regarded as a decisive parameter for the ring rolling process because it decides the blank dimension, reflects the ring deformation degree and influences the forming results. However, its importance for the ring rolling process is always neglected. In this paper, the effect of rolling ratio on the groove-section profile ring rolling is firstly investigated. The relationships between rolling ratio and blank dimension, rolling ratio and ring deformation degree are theoretically studied and a theoretical value range of rolling ratio is proposed. Then, with FE simulation, the influences of rolling ratio on the forming results are revealed. Based on comparison and experimental verification, a reasonable value range of rolling ratio is determined.

“…So, from Eqs. (8) and (19), it can be seen that with the increase of λ , h ∆ decreases, the rolling force and moment can descend.…”

Section: Force and Power Parametersmentioning

confidence: 93%

Section: Theoretical Value Range Of Rolling Ratiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of rolling ratio on groove-section profile ring rolling

Zhao

2010

J Mech Sci Technol

“…Pioneering research results in RRR were obtained through physical experiments (Hawkyard et al, 1973;Johnson and Needham, 1968;Mamalis et al, 1976a), analytic calculation (Hahn and Yang, 1991;Hua and Zhao, 1997;Mamalis et al, 1976b) and finite element (FE) simulations (Kim et al, 1990;Xu et al, 1991;Yang and Kim, 1988) from the 1960s to the 1990s.…”

Section: Recent Development Of Rrrmentioning

confidence: 99%

Recent development of ring rolling theory and technique

Hua

Deng

2017

IJMPT

Rings are basic mechanical components. Ring rolling is a well-known advanced plastic forming technique to manufacture high-performance seamless rings. Since the 21st century, the fast development of global manufacturing has raised an urgent request to high-performance rings, thus, comprehensive and in-depth studies on ring rolling technique were carried out. Based on long-term investigations and attentions on ring rolling, important developments of ring rolling theory and technique in recent 15 years were simply summarised, including the traditional radial ring rolling and radial-axial ring rolling, as well as the novel combined ring rolling. It is expected to give a valuable reference to the research and application of ring rolling.Keywords: ring rolling; theory; technology; equipment; recent development.Reference to this paper should be made as follows: Hua, L., Deng, J. and Qian, D. (2017)

“…It has been used in many industry fields, including aeronautics, astronautics, automobile, atomic energy, etc. At present, much research on ring rolling has been carried out by experimental method [2, 3], analytical method [4][5][6] and finite element method [7][8][9], which study various aspects like technology design [10,11], deformation condition [12,13] and material properties [14]. However, most of the research focused on rectangular section ring rolling and profile ring rolling was rarely investigated.…”

Section: Introductionmentioning

confidence: 99%

Blank design optimization for stepped-section profile ring rolling

Sci. China Technol. Sci.

Hua

2010

A stepped-section ring consists of two rectangular section rings, a big ring and a small ring, joined together. This kind of ring is difficult to process by the ring rolling technique because of its complex cross-sectional shape. Thus a reasonable blank design is necessary. In this paper, four blank designs, one is a rectangular cross-section and the other three are stepped-sections with different step volumes, are proposed and compared with each other using theoretical analysis, FE simulation and experiments. It is shown that three of the designs can lead to volume flow from small ring into big ring during rolling, which is disadvantageous for shape formation and dimensional precision; however, the other design may result in good ring shape and high dimensional precision. Therefore, the optimal blank design is determined to be the one in which the volumes of the big and small rings of the initial blank are equal to those of the final rings, respectively. ring rolling, stepped-section ring, optimization design, FE simulation Citation:Qian D S, Hua L. Blank design optimization for stepped-section profile ring rolling. NomenclatureR 0 Outer radius of rectangular section blank r 0 Inner radius of blank H 0 Thickness of rectangular section blank B 0 Height of blank R b0 Outer radius of big ring of stepped-section blank R s0 Outer radius of small ring of stepped-section blank H b0 Thickness of big ring of stepped-section blank H s0 Thickness of small ring of stepped-section blank B b0 Height of big ring of stepped-section blank B s0 Height of small ring of stepped-section blank L 0 Thickness of step of blank R bOuter radius of big ring of rolled ring R sOuter radius of small ring of rolled ring r Inside radius of rolled ring H b Thickness of big ring of rolled ring H s Thickness of small ring of rolled ring B bHeight of big ring of rolled ring B s Height of small ring of rolled ring L Thickness of step of rolled ring V b0 Volume of big ring of blank V s0 Volume of small ring of blank V bVolume of big ring of rolled ring V s Volume of small ring of rolled ring