Effects of Mandrel Structure on Ring Rolling Process for Large-Scale T-Sectioned Ring with Numerical Simulation

2013 ◽  
Vol 690-693 ◽  
pp. 2307-2310
Author(s):  
Ping Zhen Zhou ◽  
Li Wen Zhang ◽  
Sen Dong Gu ◽  
Hong Tao Duan ◽  
Li Hong Teng
Keyword(s):  
Numerical Simulation ◽  
Large Scale ◽  
Rolling Process ◽  
Ring Rolling ◽  
Small Ring ◽  
Rigid Plastic ◽  
Axial Ring ◽  
Folding Defect ◽  
Ring Rolling Process ◽  
Forming Defects

The process parameters including the mandrel structure of radial-axial ring rolling is in close relationship with the forming defects such as over-high axial spread and the folding defect in the connecting part of the big and small ring. In this paper, a 3D rigid-plastic and coupled thermal-mechanical finite-element model (FEM) of radial-axial ring rolling for large-scale T-sectioned ring was developed using commercial software of DEFORM-3D. By changing the chamfer radius of mandrel's work roll, the effects of mandrel structure on the height of axial spread which considerably affects the stability of the ring rolling process were investigated. The folding defect was also simulated. The numerical simulation results showed that with the decrement of the chamfer radius r, the metal increasingly accumulated in the big ring and the axial spread height increased. Consequently, the ring rolling process became unstable. Also, the folding angle augmented.

Feed Speed Design and Optimization in Radial-Axial Ring Rolling Process by FEM

2011 ◽  
Vol 421 ◽  
pp. 513-521
Author(s):  
Shi Biao Liu ◽  
Ke Lu Wang ◽  
Shi Qiang Lu ◽  
Xin Li ◽  
Xian Juan Dong
Keyword(s):  
Rolling Force ◽  
Effective Strain ◽  
Rolling Process ◽  
Ring Rolling ◽  
Fe Model ◽  
Feed Speed ◽  
Rigid Plastic ◽  
Axial Ring ◽  
Ring Rolling Process

Radial-axial ring rolling is an important component of advanced manufacturing technology, but it has characteristics of high nonlinear on geometry and physics, so the radial-axial ring rolling process becomes very complex. In addition, the feeding mode of core roller has enormous influence on the quality of the rolled ring as well as the stability of the process. In this paper, a 3D rigid-plastic FE model of radial-axial ring rolling process is established, then three kinds of feed speed design ((1)constant of feed speed; (2)constant of feed in one rotary; (3)variation of feed speed)are offered. The difference of outer radius growth velocity, distribution of effective strain and temperature, rolling force, size of ring are analysised for the three kinds of feed methods. And, an optimized feed method is proposed base on analytic results, the optimized feed method can improve the quality of formed ring, and decrease the requirement of ring rolling mill.

Key Technologies for 3D-FE Modeling of Radial-Axial Ring Rolling Process

2008 ◽  
Vol 575-578 ◽  
pp. 367-372 ◽  
Author(s):  
L.G. Guo ◽  
He Yang
Keyword(s):  
Modeling And Simulation ◽  
Optimum Design ◽  
Rolling Process ◽  
Ring Rolling ◽  
Fe Modeling ◽  
Precise Control ◽  
Key Technologies ◽  
Axial Ring ◽  
Forming Characteristics ◽  
Ring Rolling Process

Nowadays, 3D-FE Modeling and simulation is an indispensable method for the optimum design and precise control of radial-axial ring rolling process for its complexities. In this paper, the unique forming characteristics of radial-axial ring rolling have first been summarized, and then some key technologies for 3D-FE modeling of the process have been presented and their solution schemes have been given out, lastly the modeling and simulation of radial-axial ring rolling process have been realized using elastic-plastic dynamic explicit procedure under ABAQUS environment. The work provides an important basis and platform for the future investigations, such as forming mechanism and laws, process optimum design and precise control.

A Comparison between Isothermal and Coupled Thermo-Mechanical FE Analyses of the Ring Rolling Process

2011 ◽  
Vol 264-265 ◽  
pp. 235-240
Author(s):  
Nassir Anjami ◽  
Ali Basti
Keyword(s):  
Finite Element ◽  
Rolling Process ◽  
Ring Rolling ◽  
Continuous Change ◽  
Rigid Plastic ◽  
Mechanical And Physical Properties ◽  
Prediction And Control ◽  
3D Deformation ◽  
Ring Rolling Process ◽  
And Control

Ring rolling process, especially hot rolling is characterized by 3D deformation, continuous change of thickness and height, high nonlinearity, non-steady flow and asymmetry. It involves both mechanical and thermal behaviors. Most mechanical and physical properties and boundary conditions are temperature related. The heat flow and stress analysis cannot be analyzed separately. In this study, both isothermal and coupled thermo-mechanical (CTM) 3D rigid-plastic finite element (FE) models of the hot ring rolling (HRR) process are developed to investigate their differences in accurately and quickly predicting the process. The results show that the latter should be more advantageous to the more accurate prediction and control of microstructure and properties of the ring.

Slip line model for forces estimation in the radial-axial ring rolling process

2018 ◽  
Vol 138-139 ◽  
pp. 17-33 ◽  
Author(s):  
Luca Quagliato ◽  
Guido A. Berti ◽  
Dongwook Kim ◽  
Naksoo Kim
Keyword(s):  
Slip Line ◽  
Rolling Process ◽  
Ring Rolling ◽  
Line Model ◽  
Axial Ring ◽  
Ring Rolling Process

scholarly journals Optimization on cooperative feed strategy for radial–axial ring rolling process of Inco718 alloy by RSM and FEM

2016 ◽  
Vol 29 (3) ◽  
pp. 831-842 ◽  
Author(s):  
Xinglin Zhu ◽  
Dong Liu ◽  
Yanhui Yang ◽  
Yang Hu ◽  
Yong Zheng
Keyword(s):  
Rolling Process ◽  
Ring Rolling ◽  
Axial Ring ◽  
Feed Strategy ◽  
Ring Rolling Process

scholarly journals Optimization and Simulation of Machining Parameters in Radial-axial Ring Rolling Process

2011 ◽  
Vol 4 (3) ◽  
pp. 337
Author(s):  
Shuiyuan Tang ◽  
Jiping Lu ◽  
Hongli Fan ◽  
Ruizhao Du ◽  
Zhonghua Jian ◽  
...  
Keyword(s):  
Rolling Process ◽  
Ring Rolling ◽  
Machining Parameters ◽  
Axial Ring ◽  
Optimization And Simulation ◽  
Ring Rolling Process

Research on the Movement of the Guiding Roll in the Ring Rolling Process

2011 ◽  
Vol 101-102 ◽  
pp. 880-883
Author(s):  
Xue Dao Shu ◽  
Min Xiao
Keyword(s):  
Numerical Simulation ◽  
Angular Velocity ◽  
Cross Sections ◽  
Rolling Process ◽  
Scientific Basis ◽  
Ring Rolling ◽  
Rolling Equipment ◽  
Simulation Results ◽  
Ring Rolling Process

The guiding roll is an important part of the ring rolling equipment which plays an important part in stabilizing the rolling and ensuring the quality of product. This paper obtained the formula for instant diameter of ring during the rolling process and established the motion equation of guiding roll. The angular velocity, instant displacements in X and Y direction of guiding roll center were calculated by MATLAB software. The numerical simulation of ring rolling of ring with rectangular cross sections was completed under the ABAQUS/Explicit environment after importing the instant displacement of guiding roll center. The simulation results indicate that the guiding roll could be controlled accurately by the proper method. These research conclusions can provide scientific basis for ensuring the quality of product and accurately controlling the movement of guiding roll during the ring rolling.

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