Multi-response optimisation design of parameters for cold ring rolling process using fuzzy-grey method

2015 ◽  
Vol 50 (2) ◽  
pp. 101 ◽  
Author(s):  
Lanyun Li ◽  
Xiao Li ◽  
Jing Liu ◽  
Zhi He
Keyword(s):  
Rolling Process ◽  
Ring Rolling ◽  
Cold Ring Rolling ◽  
Ring Rolling Process

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.

Determining and Optimizing of Guide Rolls Motion Track in Cold Ring Rolling Process

2006 ◽  
Vol 532-533 ◽  
pp. 141-144 ◽  
Author(s):  
Zhi Chao Sun ◽  
He Yang ◽  
Lan Yun Li
Keyword(s):  
Functional Relationship ◽  
Rolling Force ◽  
Rolling Process ◽  
Initial Position ◽  
Ring Rolling ◽  
Software Environment ◽  
Cold Ring Rolling ◽  
The Stability ◽  
Ring Rolling Process ◽  
And Control

Guide rolls play an important role in controlling both the ring circularity and the stability of cold ring rolling process. However, it is difficult to predict and control the motion of the guide rolls due to the complexity of process associated with the coupled effects of multi-factors. In this paper, a reasonable controlling model of the guide rolls is proposed, and the functional relationship between the motion track of the guide rolls and their setup parameters and process ones is established, by which the guide rolls motion track can be determined. On this basis, a 3D-FE simulation model for cold ring rolling is developed under the ABAQUS software environment and the effects of the initial position and motion track of the guide rolls on the forming stability, ring circularity, rolling force, and oscillating are investigated. Taking the forming stability and ring circularity as objects, the optimum initial position and motion track of the guide rolls are obtained.

Elastic–plastic finite element analysis of cold ring rolling process

2002 ◽  
Vol 125-126 ◽  
pp. 613-618 ◽  
Author(s):  
Hiroshi Utsunomiya ◽  
Yoshihiro Saito ◽  
Tomoaki Shinoda ◽  
Ichiro Takasu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Rolling Process ◽  
Ring Rolling ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Cold Ring Rolling ◽  
Ring Rolling Process

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.

Deformation Behavior of Spirogyrate Ring for Cold Ring Rolling

2011 ◽  
Vol 239-242 ◽  
pp. 2435-2439 ◽  
Author(s):  
Wu Jiao Xu ◽  
Xiao Tao Gong ◽  
Xiao Bing Yang ◽  
Jie Zhou
Keyword(s):  
Deformation Behavior ◽  
Fem Analysis ◽  
Rolling Process ◽  
Ring Rolling ◽  
Outer Diameter ◽  
Cold Ring Rolling ◽  
Ring Diameter ◽  
Inner Diameter ◽  
Two Phases ◽  
Ring Rolling Process

Based on the platform ABAQUS, a 3-D FEM model of spirogyrate ring rolling process has been developed to investigate the ring’s deformation behavior and the expansion law of the diameter. According to the FEM analysis, this kind of profile ring rolling process can be divided into two phases, i.e. the profile forming phase and the diameter increasing phase. During the former phase, the deformation of spirogyrate ring focuses on the profile formation and the diameter increases slowly. In the latter phase, the ring diameter expands rapidly. FEA illustrates that the material flowing to the outer diameter areas is greater than that towards the inner diameter areas in the profile forming phase. The maximum PEEQ is in the pit of the outer profile, whereas the minimum PEEQ locates near the end face. The variation of outer and inner diameter of the spirogyrate ring shows monotonic increasing trend during the whole ring rolling process, in which the expanding rate of inner areas is greater than that of the outer areas.

Two Hourglass Control Methods for Dynamic Analysis in Cold Ring Rolling Process

2010 ◽  
Vol 42 ◽  
pp. 326-330
Author(s):  
Qun Yan Tan ◽  
Xin Zhao ◽  
Xue Bin Zhang
Keyword(s):  
Rolling Process ◽  
Ring Rolling ◽  
Control Methods ◽  
Rectangular Section ◽  
Advantages And Disadvantages ◽  
Artificial Damping ◽  
Cold Ring Rolling ◽  
Stiffness Method ◽  
Hourglass Control ◽  
Ring Rolling Process

The two methods of artificial damping and artificial stiffness are developed in dynamic explicit FEA code for ring rolling. Advantages and disadvantages of artificial damping method and artificial stiffness method are analyzed. A rectangular section cold ring rolling is simulated. The hourglass energy and the ratio of the hourglass energy to the internal energy are compared between the two hourglass control methods. The hourglass control coefficient criterion of the two methods in the cold ring rolling simulation is proposed.

A One-Point Quadrature Element Used in Simulation of Cold Ring Rolling Process

2011 ◽  
Vol 704-705 ◽  
pp. 165-171 ◽  
Author(s):  
Xue Bin Zhang ◽  
Xin Zhao ◽  
Yan Min Zhang ◽  
Zhi Gang Li
Keyword(s):  
Finite Element ◽  
Single Point ◽  
Rolling Process ◽  
Point Load ◽  
Ring Rolling ◽  
Rectangular Section ◽  
Element Simulation ◽  
Cold Ring Rolling ◽  
Hourglass Control ◽  
Ring Rolling Process

A single-point load will be applied on the ring in the cold ring rolling process when the ring vibrates violently. This arouses hourglass in finite element simulation of the process using reduced integration element. A one-point quadrature element with hourglass control developed by Hu is used, and the user-defined control parameters are not required. Hourglass energy can be reduced to 3 percent of the internal energy. The element is applied to simulation of a pure radial cold ring rolling with rectangular section. Compared with the experimental results, the simulation results are proved to be accurate. Key-Words: one-point quadrature; Hourglass control; finite element; cold ring rolling

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