scholarly journals A Mandrel Feeding Strategy in Conical Ring Rolling Process

2014 ◽  
Vol 2014 ◽  
pp. 1-13
Author(s):  
Wen Meng ◽  
Guoqun Zhao ◽  
Yanjin Guan
Keyword(s):  
Feed Rate ◽  
Feeding Strategy ◽  
Simulation Method ◽  
Rolling Process ◽  
Ring Rolling ◽  
Fe Model ◽  
Die Structure ◽  
Value Range ◽  
Ring Rolling Process

A mathematical model for radial conical ring rolling with a closed die structure on the top and bottom of driven roll, simplified as RCRRCDS, was established. The plastic penetration and biting-in conditions in RCRRCDS process were determined. A mandrel feeding strategy for RCRRCDS process was proposed. The mandrel feed rate and its reasonable value range were deduced. The coupled thermal-mechanical FE model of RCRRCDS process was established. The reasonable value range of the mandrel feed rate was verified by using numerical simulation method. The results indicate that the reasonable value range of the mandrel feed rate is feasible, the proposed mandrel feeding strategy can realize a steady RCRRCDS process, and the forming quality of conical ring rolled by using the proposed feeding strategy is better than that of conical ring rolled by using a constant mandrel feed rate.

The Optimal Design for Ring Blank Dimensions in Inner L-Shaped Ring Rolling Process

2014 ◽  
Vol 599-601 ◽  
pp. 511-516
Author(s):  
Wen Meng ◽  
Guo Qun Zhao ◽  
Yan Jin Guan
Keyword(s):  
Optimal Design ◽  
Feed Rate ◽  
Rolling Process ◽  
Ring Rolling ◽  
Fe Model ◽  
Deformation Characteristics ◽  
Rolled Ring ◽  
Value Range ◽  
Ring Rolling Process ◽  
Ring Blank

As the needs of profiled rings continuously increase, studies about profiled ring rolling processes is becoming a hot problem. This paper established a FE model of hot ring rolling process of inner L-shaped ring based on ABAQUS/Explicit software. The reasonable value range of mandrel feed rate is determined at first. Then the deformation characteristics of rings are analyzed and compared in L-shaped ring rolling process under four different ring blank dimensions. Finally, for realizing a steady rolling process and obtaining good dimensions properties of rolled ring, an appropriate ring blank dimension is given.

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.

Investigation on Constant and Variable Feed Speeds Effects in Ring Rolling Process Using 3D FEM

2011 ◽  
Vol 264-265 ◽  
pp. 1776-1781 ◽  
Author(s):  
Nassir Anjami ◽  
Ali Basti
Keyword(s):  
Finite Element ◽  
Rolling Process ◽  
Ring Rolling ◽  
Outer Diameter ◽  
Fe Model ◽  
Feed Speed ◽  
3D Fem ◽  
Cold Ring Rolling ◽  
Plastic Deformation Behavior ◽  
Ring Rolling Process

Although cold ring rolling (CRR) process is largely used in the manufacturing of profiled rings like bearing races, research on this purpose has been scant. In this study, based on a validated finite element (FE) model, CRR process is simulated regarding the variable and constant feed speeds of the mandrel roll which lead to constant and variable values of the ring's diameter growth rates respectively using a 3D rigid-plastic finite element method (FEM). Major technological problems involved in the process including plastic deformation behavior, strain distribution and its uniformity, Cockcroft and Latham damage field and final outer diameter of ring are fully investigated. The results of simulations would provide a good basis for process control especially feed speed controlled mills and guiding the design and optimization of both cold and hot ring rolling process.

Effects of Rotational Speed of Driver Roll on Hot Ring Rolling of 6061 Aluminum Alloy by 3D FE Simulation

2013 ◽  
Vol 773 ◽  
pp. 309-315 ◽  
Author(s):  
Lian Jie Li ◽  
Xiao Dong Luo ◽  
Yong Xiang Zhu
Keyword(s):  
Aluminum Alloy ◽  
Rotational Speed ◽  
Rolling Process ◽  
Ring Rolling ◽  
Fe Model ◽  
6061 Aluminum Alloy ◽  
Hot Rolling Process ◽  
Rolled Ring ◽  
Force Contact

In this paper, a 3D elastic-plastic and coupled thermo-mechanical FE model of radial ring rolling of 6061 aluminum alloy is developed, and the hot rolling process with different the rotational speed of driver roll n is simulated by using the dynamic explicit code ABAQUS/Explicit. The influence laws of the rotational speed of driver roll on the uniformity of strain and temperature distribution (STD), fishtail coefficient, roll force, contact area and roll moment are revealed respectively. One optimum n is obtained, under which SDT is relatively uniform; meanwhile, another optimum n is obtained, under which the quality of end-plane of the rolled ring is the best. The result can provide a valuable guideline to research and optimum of the hot ring rolling of aluminum alloys.

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.

The Effect of the Initial Temperature of Ring Blank on Conical Ring Rolling Process

2014 ◽  
Vol 597 ◽  
pp. 266-271
Author(s):  
Wen Meng ◽  
Guo Qun Zhao ◽  
Yan Jin Guan
Keyword(s):  
Temperature Distribution ◽  
Initial Temperature ◽  
Rolling Force ◽  
Rolling Process ◽  
Ring Rolling ◽  
Fe Model ◽  
Rolling Moment ◽  
Rolled Ring ◽  
Ring Rolling Process ◽  
Ring Blank

A FE model of radial conical ring rolling process with a closed die structure on the top and bottom part of driven roll (RCRRCDS) process was set up based on ABAQUS/Explicit software. The effect of the initial temperature of conical ring blank on equivalent plastic strain (PEEQ) and temperature distribution of rolled ring, average rolling force and average rolling moment was investigated. The results indicated that with the increase of the initial temperature of ring blank, the PEEQ distribution of rolled ring becomes uniform at first and then less uniform; the temperature distribution gradually becomes homogeneous; and both average rolling force and average rolling moment decrease. When the initial temperature of ring blank is 925°C, the PEEQ distribution of rolled ring is most uniform; the temperature distribution of rolled ring is relatively uniform; the average rolling force and average rolling moment are relatively smaller.

Analyses of Guiding Force for the Ring Rolling Mill

2010 ◽  
Vol 154-155 ◽  
pp. 278-281
Author(s):  
Dong Zhao ◽  
Zeng Hai Xu ◽  
Qiang Wang ◽  
Dong Mei Cai
Keyword(s):  
Rolling Mill ◽  
Rolling Process ◽  
Ring Rolling ◽  
Outer Diameter ◽  
The Stability ◽  
Ring Rolling Mill ◽  
Ring Rolling Process

The guiding forces will affect the stability of the ring rolling process and the quality of the product directly. In this paper, the guiding forces and the sector gear forces are analyzed by building theoretical equations and numerical value simulations. The variation tendencies of the guiding forces and the sector gear forces changing with the ring’s outer diameter in both steady and unsteady ring rolling phases are found out base on the theoretical and simulation analyses.

Numerical Analysis of Force and Power Parameters in Cold Ring Rolling

2007 ◽  
Vol 561-565 ◽  
pp. 805-808 ◽  
Author(s):  
L.G. Guo ◽  
He Yang
Keyword(s):  
Numerical Analysis ◽  
Three Dimensional ◽  
Rolling Process ◽  
Ring Rolling ◽  
Fe Model ◽  
Roll Force ◽  
Rolling Mills ◽  
Roll Moment ◽  
Cold Ring Rolling ◽  
Ring Rolling Process

During cold ring rolling process, the accurate prediction and analysis of force and power parameters, including roll force (RF) and roll moment (RM), is important in selecting, designing and developing the forming rolls and cold ring rolling mills. In this paper, a three-dimensional elastic-plastic dynamic explicit FE model of cold ring rolling process has been presented and validated in terms of roll force and geometry development. Based on the model, the variation laws of force and power parameters under different sizes of forming rolls (including driver roll and idle roll) and forming parameters (including the rotational speed of driver roll 1 n and the feed rate of idle roll v ) have been revealed by comprehensive numerical simulations.

scholarly journals The Effects of Forming Parameters on Conical Ring Rolling Process

2014 ◽  
Vol 2014 ◽  
pp. 1-18
Author(s):  
Wen Meng ◽  
Guoqun Zhao ◽  
Yanjin Guan
Keyword(s):  
Growth Rate ◽  
Equivalent Plastic Strain ◽  
Rolling Process ◽  
Outer Radius ◽  
Ring Rolling ◽  
Obtuse Angle ◽  
Fe Model ◽  
Rolling Moment ◽  
Temperature Distributions ◽  
Ring Rolling Process

The plastic penetration condition and biting-in condition of a radial conical ring rolling process with a closed die structure on the top and bottom of driven roll, simplified as RCRRCDS, were established. The reasonable value range of mandrel feed rate in rolling process was deduced. A coupled thermomechanical 3D FE model of RCRRCDS process was established. The changing laws of equivalent plastic strain (PEEQ) and temperature distributions with rolling time were investigated. The effects of ring’s outer radius growth rate and rolls sizes on the uniformities of PEEQ and temperature distributions, average rolling force, and average rolling moment were studied. The results indicate that the PEEQ at the inner layer and outer layer of rolled ring are larger than that at the middle layer of ring; the temperatures at the “obtuse angle zone” of ring’s cross-section are higher than those at “acute angle zone”; the temperature at the central part of ring is higher than that at the middle part of ring’s outer surfaces. As the ring’s outer radius growth rate increases at its reasonable value ranges, the uniformities of PEEQ and temperature distributions increase. Finally, the optimal values of the ring’s outer radius growth rate and rolls sizes were obtained.

scholarly journals A Feeding Strategy in Inner L-Shape Ring Hot Rolling Process

2017 ◽  
Vol 2017 ◽  
pp. 1-17
Author(s):  
Wen Meng ◽  
Feifan Wang ◽  
Yanjin Guan
Keyword(s):  
Feeding Strategy ◽  
Equivalent Plastic Strain ◽  
Rolling Process ◽  
Middle Part ◽  
Outer Radius ◽  
Ring Rolling ◽  
Inner Radius ◽  
Die Structure ◽  
Rolled Ring ◽  
Higher Temperature

In order to make the inner L-shape ring polling process with a closed die structure (ILRRCDS) on the top and bottom of the driven roll stable, at first, this paper established the mathematical model for ILRRCDS. Then, the plastic penetration and biting-in conditions for ILRRCDS were deduced based on plain ring rolling theory. Moreover, a feeding strategy that can realize a constant growth of the ring’s outer radius was proposed and the reasonable value ranges of the feed rate of the mandrel were determined. The numerical simulation model for ILRRCDS is established based on ABAQUS software. Finally, the equivalent plastic strain (PEEQ) and temperature distributions of rolled ring were obtained. The results indicated that the proposed feeding strategy can realize a stable ILRRCDS. At the end of ILRRCDS, the PEEQ at the inner radius surface of the ring is maximum, the PEEQ at the outer radius surface of the ring takes the second place, and the PEEQ at the middle part of ring is minimum. With the increase of rolling time, the higher temperature zone of the rolled ring gradually moves from the center part of the ring to the “inner corner zone” of the ring.

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