Simulation of Disc Cutter Loads Based on ANSYS/LS-DYNA

2011 ◽  
Vol 127 ◽  
pp. 385-389 ◽  
Author(s):  
Xiao Huo Li ◽  
Wei Du ◽  
Zhi Long Huang ◽  
Wei Li Fu
Keyword(s):  
Finite Element ◽  
Hard Rock ◽  
Rolling Force ◽  
Element Model ◽  
Rock Cutting ◽  
Disc Cutter ◽  
Vertical Force ◽  
Prediction Formula ◽  
Cutting Head ◽  
Cutter Forces

In order to solve serious damage of pick on part-face tunnel machine during hard rock cutting, explore the applicability of disc cutter on the machine, the structure of disc cutter was designed, a model of dist cutter was built with Pro/E software, finite element model was established in ANSYS/LS-DYNA, the vertical force and rolling force of a disc cutter were obtained by simulation of cutter cutting. Analysis shows that the disc cutter can cut granite whose hardness is 106.2MPa, so the disc cutter can cut hard rock. The vertical force and rolling force agreed with common prediction formula of disc cutter forces which showed that modeling method is correct and feasible, this paper lays the foundation for the design and development of a cutting head of hard rock roadheader.

The Analysis of the Parameters of Rock Cutting by Disc Cutter Based on ANSYS

2013 ◽  
Vol 791-793 ◽  
pp. 778-781
Author(s):  
An Ning Zhang ◽  
Feng Zhu ◽  
Zhao Feng Zhu
Keyword(s):  
Yield Criterion ◽  
Element Model ◽  
Rock Cutting ◽  
Rock Breaking ◽  
Disc Cutter ◽  
Vertical Force ◽  
Rock Damage ◽  
Plastic Yield ◽  
Rock Mechanical Properties ◽  
Tbm Cutter

When TBM tunneling, the disc cutter directly in contact with the rock. The disc cutter is an important component of the TBM, so the numerical simulation study of disc cutter breaking rock process is established. The study contents disc cutter exerted vertical force on the rock. This is instructive for improving the disc cutter layout and improving the rock breaking capacity and tunneling efficiency. According to the rock Drucker-Prager plastic yield criterion lines and rock mechanical properties, finite element model of rock breaking by disc cutter was established by ANSYSWORKBENCH software and process of rock cutting with disc cutter was simulated. The rock elastic-plastic deformation occurred in the disc cutter effect, caused accumulation of rock damage, when the rock breaks completely damaged, get the vertical force exerted on the disc cutter, which is significance for the disc cutter layout and the calculation of force of TBM cutter breaking rock.

scholarly journals Analysis of Vibration of Roadheader Rotary Table Based on Finite Element Method and Data from Underground Coalmine

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Minjun Zhang ◽  
Fuyan Lyu ◽  
Xiushan Tang ◽  
Yang Yang ◽  
Xiaodong Ji ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dynamic Properties ◽  
Single Point ◽  
Element Model ◽  
Rotary Table ◽  
Cutting Head ◽  
Cutting System ◽  
The Finite Element Model ◽  
Intense Vibration

The intense vibration of a roadheader rotary table damages the cutting system of the roadheader and reduces the efficiency. This paper analyzes the vibration of a rotary table by combining the finite element model with tested data from an underground coalmine. First, the force of the rotary table during the cutting procedure was analyzed, and the finite element model was built using Pro/E and ADAMS. The tested data were then imported into the model after selection, procession, and combination were conducted. Next, the six lowest-order parameters of the rotary table were calculated. A vibration analysis of the rotary table under certain working conditions was conducted, and the results were compared with those from a modal experiment using a single-point excitation method. According to the comparison between the simulation result and experiments, it is clear that this method is both reasonable and feasible. And it could supplement the theoretical foundation of the analysis of other roadheader components, providing reference for the improvement of the structure and dynamic properties of a roadheader. In addition, other vibration components of a roadheader such as the cutting head and the cutting arm could also be analyzed through the proposed method, with very reliable precision.

The Rolling Force Analysis of Closed Ring Rolling High-Neck Flange

2012 ◽  
Vol 201-202 ◽  
pp. 1130-1134
Author(s):  
Wen Fei Peng ◽  
Jing Jing Liang ◽  
Xue Dao Shu ◽  
Bao Shou Sun ◽  
Min Xiao
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Process Parameters ◽  
Rotational Speed ◽  
Rolling Force ◽  
Element Model ◽  
Ring Rolling ◽  
Force Analysis ◽  
Closed Ring ◽  
Feeding Speed

The rolling force will directly have influence on the size of high-neck flange and whether the rolled part will be shaped successfully. Finite element model of closed ring rolling high-neck flange was established, the effect of process parameters on rolling force and its reasons are analyzed. The results show that, the higher feeding speed is, the larger the amplification of rolling force will be, in addition, rolling force will be reduced slightly with the increase of rotational speed of driving roller, and the influence on the rolling force of compressing roller’s feeding speed is much larger than driving roller’s rotational speed.

Analysis of Cold-Rolled Strip Profile in UCM Mill by Finite Element Method

2010 ◽  
Vol 443 ◽  
pp. 21-26 ◽  
Author(s):  
Yun Zhang ◽  
Quan Yang ◽  
Xiao Chen Wang ◽  
Xiao Zhong Du ◽  
Xuan Zheng ◽  
...  
Keyword(s):  
Finite Element ◽  
Rolling Force ◽  
Element Model ◽  
Strip Thickness ◽  
Rolled Strip ◽  
Force Distribution ◽  
Three Dimension ◽  
Strip Profile ◽  
Edge Drop ◽  
Strip Crown

In order to analyze the effect of entry strip thickness, entry strip crown and intermediate roll shifting on strip profile and rolling force distribution, a three dimension finite element model of rolls-strip in UCM mill was established and employed. The results showed that the increases of entry strip thickness and entry strip crown would lead to the increase of exit strip crown and edge drop under the same total rolling force; the strip crown and edge drop would be decreased if the intermediate roll shifting δi was decreased. Moreover, the rolling force distribution also was analyzed in details by changing the entry strip thickness, the entry strip crown and the intermediate roll shifting.

Finite Element Analysis of Thin Strip Profile in Asymmetric Cold Rolling Considering Work Roll Crossing and Shifting

2014 ◽  
Vol 1061-1062 ◽  
pp. 515-521 ◽  
Author(s):  
Abdulrahman Aljabri ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei
Keyword(s):  
Finite Element ◽  
Cold Rolling ◽  
Finite Element Model ◽  
Rolling Force ◽  
Element Model ◽  
Work Roll ◽  
Rolling Process ◽  
Thin Strip ◽  
Asymmetric Rolling ◽  
Element Analysis

Cold rolled thin strip has received a great deal of attention through technological and theoretical progress in the rolling process, as well as from researchers who have focused on some essential parameters of strip such as its shape and profile. This paper describes the development of a 3-D finite element model of the shape of thin strip during cold rolling to simulate the cold rolling of WCS (work roll crossing and shifting) in asymmetric rolling. This finite element model considers the asymmetrical rolling parameters such as variations in the diameters of the rolls and the crossing angle as the work roll shifts on the strip during cold rolling. The shape and profile of the strip are discussed in the asymmetrical and symmetrical rolling conditions, while the total rolling force and distribution of stress are discussed in the case where the roll cross angle and axial shifting roll changes. The results can then be used to control the shape and profile of thin strip during rolling.

scholarly journals Mechanical Force System of Double Key Loop With Finite Element Analysis 

2020 ◽  
Author(s):  
Jiali Liu ◽  
Duanqiang Zhang ◽  
Linyu Xu ◽  
Senxin Cai ◽  
Jinquan Guo ◽  
...  
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Vertical Force ◽  
Element Analysis ◽  
Force System ◽  
Anterior Teeth ◽  
Lower Magnitude ◽  
Type 3

Abstract Background: The mechanics of double key loop (DKL) was not well defined and this finite element study was designed to explore its force system.Methods: Simplified 3-dimensional finite element model of single and double key loops with archwire between lateral incisor and second premolar was established in Ansys Workbench. Activation in Type-1 (retraction at distal end), Type-2 (retraction at distal key) and Type-3 (Type-2 plus ligation between keys) were simulated. The vertical force, load/deflection ratio and moment/force ratio of stainless steel and TMA loops were calculated and compared.Results: Double key loop generated about 40% force of single key loop. Type-2 loading of DKL showed higher L/D ratio than in Type-1 loading with similar M/F ratio. Type-3 loading of DKL showed the highest M/F ratio with similar L/D ratio as single key loop. The M/F ratio in Type-3 loading increased with the decrease of retraction force. DKL of TMA produced about 40% of force and moment compared to those of SS in all loading types. When activated at equal distance bellow 1mm, the M/F ratio of SS and TMA DKL with equal preactivation angle were almost the same. Conclusion: M/F ratio on anterior teeth increases with preactivation angle and deactivation of DKL. M/F ratio at certain distance of activation depends mainly on preactivation angle instead of wire material. TMA is recommended as substitute of SS in DKL for lower magnitude of force.

Studies on the formation of discontinuous chips during rock cutting using an explicit finite element model

2013 ◽  
Vol 70 (1-4) ◽  
pp. 635-648 ◽  
Author(s):  
Pradeep L. Menezes ◽  
Michael R. Lovell ◽  
Ilya V. Avdeev ◽  
Jeen-Shang Lin ◽  
C. Fred Higgs
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Rock Cutting ◽  
Explicit Finite Element

Influence Regularities of Axial Force of Cross Wedge Rolling Symmetric Shaft-Parts about Technical Parameters

2011 ◽  
Vol 314-316 ◽  
pp. 589-593 ◽  
Author(s):  
Xue Dao Shu ◽  
Bao Shou Sun ◽  
Min Xiao
Keyword(s):  
Finite Element ◽  
Axial Force ◽  
Rolling Force ◽  
Element Model ◽  
Force Balance ◽  
Mold Design ◽  
Key Factors ◽  
Cross Wedge Rolling ◽  
Technical Parameters ◽  
Finite Element Software

Because of unbalanced axial force of cross wedge rolling asymmetric shaft-parts causing the rolling play and not stably, it is key factors to restrict application in asymmetric shaft-parts of cross wedge rolling. Axial force balance depends on technical parameters. So the influence regularities of axial force to technical parameters is researched in this paper by Ansys-Ls/Dyna finite element software. Finite element model is authenticated by experiment of rolling force, and the influence regularities of axial force of cross wedge rolling asymmetric shaft-parts is get. It will provide a theoretical basis for choosing reasonable parameters in mold design of cross wedge rolling asymmetric shaft-parts.

scholarly journals Modeling of Strip Shape during Cold Rolling of Thin Strip

2010 ◽  
Vol 443 ◽  
pp. 9-14 ◽  
Author(s):  
Zheng Yi Jiang ◽  
X.Z. Du ◽  
Yan Bing Du ◽  
Dong Bin Wei ◽  
Matthew Hay
Keyword(s):  
Finite Element ◽  
Cold Rolling ◽  
Rolling Force ◽  
Thickness Distribution ◽  
Simulation Models ◽  
Element Model ◽  
Thin Strip ◽  
Strip Shape ◽  
Element Simulation ◽  
Strip Quality

Strip shape is an important factor affecting the strip quality significantly during cold rolling of thin strip. In the paper, finite element simulation models of the strip shape in cold rolling for both symmetrical and asymmetrical rolling cases were successfully developed. The strip edge drop and the effect of the rolling force on the strip shape (the thickness distribution along the strip width) have been obtained. The developed finite element model has been verified with the experimental value, which shows they are in good agreement. The obtained results are applicable to control the rolled thin strip shape during cold rolling practice.

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