Punch Wear in the Forming of Deep Holes with Pulse Ram Motion on a Servo Press

2014 ◽  
Vol 611-612 ◽  
pp. 127-133 ◽  
Author(s):  
Ryo Matsumoto ◽  
Hiroshi Utsunomiya
Keyword(s):  
Cold Extrusion ◽  
Low Friction ◽  
Element Analysis ◽  
Liquid Lubricant ◽  
Backward Extrusion ◽  
Servo Press ◽  
The Finite Element Analysis ◽  
The Relationship ◽  
Punch Wear ◽  
Extrusion Method

For the fabrication of lightweight components such as hollow components, we proposed a cold extrusion method for forming of deep holes that utilizes a punch with an internal channel for the supply of liquid lubricant using a servo press. The relationship between the punch ram motion and the punch wear in the proposed forming method is investigated by the finite element analysis in this study. The punch wear is determined by using the Archard’s equation. Although low friction at specimen–punch interface realizes in the forming with pulse punch ram motion (proposed forming method), the punch wear in the backward extrusion with pulse punch ram motion is 1.1–2.4 times larger than that with no pulse punch ram motion (conventional forming method). The influence of punch ram motion and friction on the punch wear is discussed.

Cold Backward Extrusion of Titanium Billet with Pulsating Lubricant Supply on Servo Press

2012 ◽  
Vol 504-506 ◽  
pp. 381-386 ◽  
Author(s):  
Ryo Matsumoto ◽  
Shinkichi Sawa ◽  
Hiroshi Utsunomiya
Keyword(s):  
Pure Titanium ◽  
Forming Limit ◽  
Structural Components ◽  
Liquid Lubricant ◽  
Backward Extrusion ◽  
Surface Observation ◽  
Internal Channel ◽  
Servo Press ◽  
Extrusion Method

To prevent seizure in backward extrusion of holes for lightweight structural components, an extrusion method utilizing a punch having an internal channel for supplying liquid lubricant to the punch nose was applied to forming of pure titanium billet using a servo press. On the servo press, the punch was pushed into the billet in a manner combining pulsed and stepwise modes. The sufficient amount of the liquid lubricant was pulsating supplied to the cavity formed at the bottom of the hole. Appropriate punch ram motion and forming limit for preventing seizure are determined from the surface observation of the formed hole and the punch.

The Optimization of Piston Groove Diameter Based on ABAQUS

2013 ◽  
Vol 397-400 ◽  
pp. 1045-1049
Author(s):  
Sheng Guan Qu ◽  
Wen Long Li ◽  
Bin Li
Keyword(s):  
Contact Pressure ◽  
Analysis Software ◽  
Low Friction ◽  
Element Analysis ◽  
Wear Resistant ◽  
Seal Failure ◽  
The Finite Element Analysis ◽  
Two Factors ◽  
The Relationship ◽  
Lower Contact

Two factors must be given considered in low friction cylinder , which are sealing and wear. A lower contact pressure can lead to seal failure. However, a heavier contact press can increase friction force and wear. In the present paper a method have been proposed to obtain the optimal contact pressure between PTFE wear-resistant ring and the steel bushing at first, with analysis of the relationship among the surface roughness, the sealing contact pressure and the leakage. Secondly,the piston groove Diameter has been designed by using the finite element analysis software of ABAQUS to simulate the Mooney-Rivlin model, which is corresponding to this optimal contact pressure. On the premise of meeting the requirement of the specific leakage standard between the cylinder and the wear-resistant ring, the optimal contact pressure and the corresponding piston groove size have been obtained, with different surface roughnesses of the friction pairs.

Thermal Error Modeling of Precision Positioning Stage

2013 ◽  
Vol 694-697 ◽  
pp. 767-770
Author(s):  
Jing Shu Wang ◽  
Ming Chi Feng
Keyword(s):  
Thermal Deformation ◽  
Thermal Error ◽  
Error Modeling ◽  
Precision Positioning ◽  
Third Order ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Positioning Stage ◽  
Order Polynomial ◽  
The Relationship

As the thermal deformation significantly impacts the accuracy of precision positioning stage, it is necessary to realize the thermal error. The thermal deformation of the positioning stage is simulated by the finite element analysis. The relationship between the temperature variation and thermal error is fitted third-order polynomial function whose parameters are determined by genetic algorithm neural network (GANN). The operators of the GANN are optimized through a parametric study. The results show that the model can describe the relationship between the temperature and thermal deformation well.

Kriging-Based Reliability Analysis and Variance-Based Sensitivity Analysis for an Idler Shaft

2015 ◽  
Author(s):  
Weimin Cui ◽  
Wei Guo ◽  
Zhongchao Sun ◽  
Tianxiang Yu
Keyword(s):  
Sensitivity Analysis ◽  
Influence Factors ◽  
Random Variables ◽  
Kriging Model ◽  
Element Analysis ◽  
Performance Function ◽  
The Finite Element Analysis ◽  
Inner Diameter ◽  
Sensitivity Method ◽  
The Relationship

In order to analyze the reason of failure and improve the reliability of the idler shaft, this paper studies the reliability and sensitivity for the idler shaft based on Kriging model and Variance Methods respectively. The finite element analysis (FEA) of idler shaft is studied in ABAQUS firstly. Then, combining the performance function and various random variables, the Kriging model of idler shaft is established and verified. Based on Kriging model which has been established, the relationship between random variables and the response value is studied, and the function reliability is calculated which explains why the failure of the idler shaft occurred frequently in service. Finally, the variance-based sensitivity method is used for sensitivity analysis of influence factors, the result shows that the reliability of idler shaft is sensitive to the inner diameter of body A and inner diameter of body B, which could contribute for the analysis and further improvement of idler shaft.

Corrugated Waist Rail Microstructure Evolution Simulation

2014 ◽  
Vol 989-994 ◽  
pp. 425-428
Author(s):  
Jin Hong Ma ◽  
Bin Tao ◽  
Xiao Han Yao
Keyword(s):  
Research Result ◽  
Rolling Process ◽  
Element Analysis ◽  
Evolution Simulation ◽  
The Finite Element Analysis ◽  
Corrugated Web ◽  
H Beam ◽  
Rail Structure ◽  
The Relationship ◽  
Deform 3D

Applying the research result of the whole corrugated web H-beam to rail structure, a new kind of rail structure, the corrugated web rail was generated. The special structure rail was successfully rolled in the Research Mill Institute of Yanshan University. Based on the finite element analysis software DEFORM-3D, the rolling process of corrugated waist rail is simulated. The miscrostructure evolution of rolling corrugated waist rail is analysed. The relationship between miscrostructure evolution and deformation are also analysed.

Comparison between FEM Simulations and Analytical Calculations of Required Force for Al Extrusion

2012 ◽  
Vol 504-506 ◽  
pp. 511-516 ◽  
Author(s):  
Sepinood Torabzadeh Khorasani ◽  
Henry Valberg
Keyword(s):  
Finite Element Analysis ◽  
Theoretical Calculations ◽  
Al Alloys ◽  
Cold Extrusion ◽  
Extrusion Force ◽  
Low Friction ◽  
Element Analysis ◽  
Fem Simulations ◽  
Deform 2D ◽  
Good Agreement

In this study the cold extrusion of Al alloys will be investigated by finite element analysis (FEA) using DEFORM 2D. Besides, theoretical calculations to find the required extrusion force will be done. Several FE-simulations have been performed for two different extrusion geometries and for different conditions of friction including high and low friction, to quantify the influence of friction on the extrusion force. The results from FEA and theory for cold extrusion are compared to see if there is good agreement. The correlation between the data obtained by theory and FEA is discussed.

Experimental Research on Concrete Filled Thin-Walled Steel Tube Long Columns

2008 ◽  
Vol 400-402 ◽  
pp. 551-557 ◽  
Author(s):  
Bao Zhu Cao ◽  
Yao Chun Zhang ◽  
Yue Ming Zhao
Keyword(s):  
Experimental Research ◽  
Local Buckling ◽  
Steel Tube ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Global Buckling ◽  
Thin Walled ◽  
Relationship Of ◽  
The Relationship ◽  
Theoretical Results

Experimental research on square and octagonal concrete filled thin-walled steel tube long columns of 6 specimens in axial compression and 8 specimens in eccentric compression is undertaken. The relationship of global buckling bearing capacity of the columns and local buckling of the steel tubes is obtained. The test indicates that local buckling occurs in steel tube of each column before it reaches ultimate capacity, and has little effect on global buckling performance. The ultimate load decreases obviously with the increase of slender ratio and eccentricity. The ductility of columns increases with the increase of steel ratio in composite sections. Composite beam element of ANSYS is adopted in the finite element analysis. The theoretical results are agreed well with test..

Analysis of Pop-In Phenomenon in the Process of Ceramic Materials Instrumented Indentation

2014 ◽  
Vol 941-944 ◽  
pp. 564-568
Author(s):  
Jia Liang Wang ◽  
De Jun Ma ◽  
Wei Chen ◽  
Yong Huang ◽  
Liang Sun
Keyword(s):  
Radial Crack ◽  
Ceramic Materials ◽  
Mechanism Analysis ◽  
Analysis Method ◽  
Instrumented Indentation ◽  
Element Analysis ◽  
Lateral Crack ◽  
Indentation Process ◽  
The Finite Element Analysis ◽  
The Relationship

Based on the finite element analysis method, the relationship between two systems of crack (radial crack and lateral crack) and pop-in phenomenon were compared during the instrumented indentation process in ceramic materials. In order to give a reasonable explanation for mechanism analysis of pop-in phenomenon in the process of ceramic materials instrumented indentation, this paper proposed the viewpoint that pop-in phenomenon is caused by the lateral crack in the process of ceramic materials instrumented indentation. This work provided a theoretical basis for the study of instrumented indentation methodologies based on the pop-in phenomenon to determining mechanical properties of ceramic materials.

The Finite Element Analysis of Steel Cord in Radial Tire’s Belt Ply

2012 ◽  
Vol 501 ◽  
pp. 495-499
Author(s):  
Li Li ◽  
Yun Wang
Keyword(s):  
Simulation Analysis ◽  
Steel Wire ◽  
Reference Value ◽  
Element Analysis ◽  
Steel Wires ◽  
The Finite Element Analysis ◽  
Steel Cords ◽  
Steel Cord ◽  
The Relationship ◽  
Ansys Workbench

The belt ply plays an important role in the performance of radial tires, and makes the adhesion strength among rubber steel cords of the belt ply become the focus of recently research. This paper focuses on the study of the theoretical analysis of the force on the belt ply, obtaining the relationship between the size of the load at the single steel wire and the outside load and the steel wire’s deformation on a single steel wire. Taking advantage of the software ANSYS Workbench 13.0, we carried out the simulation analysis of the single steel wire, and intuitively showed you the deformation and stress of belt ply’s steel wire under the different forces, providing theoretical basis and reference value for further researches on the adhesion fatigue life of rubber steel wires.

A Novel Rotary Magneto-Rheological Damper for Haptic Interfaces

2015 ◽  
Author(s):  
Okan Topcu ◽  
Yigit Tascioglu ◽  
Erhan Ilhan Konukseven
Keyword(s):  
Mr Damper ◽  
Shear Mode ◽  
Haptic Interfaces ◽  
Rotary Valve ◽  
Low Friction ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Fluid Dampers ◽  
Magneto Rheological ◽  
Femm Software

Haptic interfaces require lightweight, small actuators with high force capability and low friction. In this paper, based on the structure of conventional shear mode disc and drum type MR fluid dampers, a lightweight continuous rotary MR damper working in valve mode is designed for haptic interfaces. The proposed design is compared to shear mode disc-type and drum-type designs with similar torque–to–mass ratio via computer simulations. Mathematical models for the resistant torques of both the shear mode and the valve mode are derived. Subsequently, the finite element analysis of electromagnetic circuit calculations was carried out by FEMM software to perform an optimization of the dimensions of the parts such as gap size and thickness. It is shown that the proposed continuous rotary valve mode MR damper is a fine candidate that meets the requirements of haptic interfaces.

Sign in / Sign up

Export Citation Format

Share Document