scholarly journals A vasalóerő átlagos felületi érdességre gyakorolt hatásának modellezése

2021 ◽  
Vol 11 (4) ◽  
pp. 139-143
Author(s):  
Viktória Ferencsik ◽  
Viktor Gál
Keyword(s):  
Deform 2D

Egy gépelem kifáradás elleni ellenállása annál nagyobb, minél kevesebb makroszerkezeti változást és belső inhomogenitást tartalmaz. Élettartam szempontjából meghatározó továbbá a kedvező a feszültségállapot és a kisebb felületi érdessége is. Publikációnk az érdességet hatékonyan csökkentő vasalási megmunkálás során beállított erő átlagos felületi érdességre gyakorolt hatásával, illetve annak végeselemes modellezésével foglalkozik. A folyamat szimulációja DEFORM-2D szoftver alkalmazásával készül, megfelelve a gyakorlatban megvalósított vasalási paraméterek (vasalási erő, előtolás, sebessé) számszerű értékeinek is, ezáltal lehetővé téve egy összehasonlító elemzést gyengén ötvözött alumínium anyagminőség esetén.

Computer-Aided Modelling of a Latch Die Cutting in Deform - 2D Software System

2016 ◽  
Vol 685 ◽  
pp. 811-815 ◽  
Author(s):  
Sergey Zvonov ◽  
Yury Klochkov
Keyword(s):  
Sheet Thickness ◽  
Cutting Process ◽  
Software System ◽  
Standard Methods ◽  
Computer Aided ◽  
Deform 2D ◽  
Theoretic Foundations

The article discusses theoretic foundations and parameters of a latch die cutting process modelled in the software system Deform - 2D. The analysis concerns standard methods of latch cutting which causes the excessive edge deformation (over 10% of a sheet thickness) that does not meet the customers' requirements.

Thermo-Mechanical Characterization of Friction Stir Spot Welded Sheets: Experimental and FEM Comparison between AA6060 and AA7050 Alloys

2015 ◽  
Vol 651-653 ◽  
pp. 1472-1479 ◽  
Author(s):  
Gianluca D'Urso ◽  
Claudio Giardini
Keyword(s):  
Mechanical Properties ◽  
Process Parameters ◽  
Lap Joints ◽  
Cnc Machine ◽  
Friction Stir ◽  
Commercial Code ◽  
Welding Forces ◽  
Set Up ◽  
Deform 2D ◽  
Short Time

A study was carried out to evaluate how the Friction Stir Spot Welding (FSSW) process parameters affect the temperature distribution in the welding region, the welding forces and the mechanical properties of the joints. An experimental campaign was performed by means of a CNC machine tool and FSSW lap joints on both AA6060 and AA7050 aluminum alloy plates were obtained. Some thermocouples were inserted into the samples to measure the temperatures during FSSW. A set of tests was carried out by varying the process parameters, namely rotational speed, axial feed rate and plunging depth. Axial welding forces were measured during the execution of the experiments by means of a piezoelectric load cell. The mechanical properties of the joints were assessed by executing shear tests on the specimens. A comparison between the quality of the joints obtained on the two materials and a correlation between process parameters and joints properties was found. A FEM model for the simulation of the process was set up using the commercial code Deform 2D. The peculiarity of this model is a 2D approach used for the simulation of a 3D problem, in order to guarantee a very simple and practical model able to achieve results in a very short time. This solution was achieved, based on a specific external routine for the calculation of the developed thermal energy due to the friction between tool and workpiece. The collected experimental data were finally used to validate the model.

Finite Element Simulation of Laser Cladding Layer Crack by Micro-Regulation Forging

2010 ◽  
Vol 139-141 ◽  
pp. 364-368 ◽  
Author(s):  
Ju Zhou ◽  
Chang Jun Qiu ◽  
De Wen Tang
Keyword(s):  
Finite Element ◽  
Laser Cladding ◽  
Element Model ◽  
Residual Tensile Stress ◽  
Adaptive Meshing ◽  
Cladding Layer ◽  
Laser Cladding Process ◽  
Adaptive Meshing Technique ◽  
Strain Relationship ◽  
Deform 2D

Micro-plastic deformation is produced on the surface of the laser cladding layer by micro-forging, and crack makes a change in cladding layer. In this paper, a finite element model with a simplified panel strain model elastic-plastic of stress and strain relationship and adaptive meshing technique was used to simulate laser cladding layer crack by using DEFORM-2D software. Laser cladding process of cracks by micro-regulation forging is simulated. Comparing to the measurement of crack width, the results show that micro-forging can make the surface of laser cladding layer the residual tensile stress to adjust compressive stress, and the micro-forging can significantly reduce or eliminate the laser cladding layer crack. Reasonable and effective regulation of high-frequency micro-forging can improve the surface quality in micro-cladding layer.

Using Servo-Drive Presses to Determine the Effect of Blank Holder Pressure on Temperature Change in Warm Forming of Sheet

2011 ◽  
Vol 133 (6) ◽  
Author(s):  
Serhat Kaya
Keyword(s):  
Heat Transfer ◽  
Surface Roughness ◽  
Temperature Change ◽  
Warm Forming ◽  
Measured Temperature ◽  
Transfer Coefficients ◽  
Servo Drive ◽  
Blank Holder ◽  
Heat Transfer Coefficients ◽  
Deform 2D

Heat transfer coefficient (HTC) is one of the most important and difficult-to-obtain parameter in high temperature environment. Contact pressure and workpiece surface roughness are among important parameters that affect the heat transfer in elevated temperature forming of sheets. In this study, HTCs are investigated experimentally by using a servo-drive press. With the flexibility that the servo-drive press offers, effect of various blank holder pressures on temperature change is determined. Before and after surface roughness conditions of aluminum and magnesium (from two different manufacturers) alloy sheets are compared. Experimental setup was modeled using deform 2d, and measured temperature curves were compared with the finite element analysis (FEA) predictions and a window of heat transfer coefficients were determined for warm forming of sheets. Determined heat transfer coefficients were implemented in a nonisothermal deep drawing FE model in deform 2d and results were compared with experiments. Good agreement was obtained between FEA predictions and experiments.

scholarly journals A COMPACTING PROCESS OF THE EN AW 6060 ALLOY

2015 ◽  
Vol 55 (5) ◽  
pp. 301 ◽  
Author(s):  
Lukáš Dragošek ◽  
Róbert Kociško ◽  
Andrea Kováčová ◽  
Robert Bidulsky ◽  
Milan Škrobian
Keyword(s):  
Density Distribution ◽  
Numerical Simulations ◽  
Vertical Channel ◽  
Processing Conditions ◽  
Optimal Conditions ◽  
Optimal Parameters ◽  
Under Five ◽  
Forward Extrusion ◽  
Deform 2D ◽  
Extrusion Method

<p>This study reports on an investigation of factors affect the process of compacting Al chips which are used to direct scrap processing through the forward extrusion method. EN AW 6060 chips of different geometry and types were mainly used as the experimental material. The chips were compacted in a die with a vertical channel (10.3mm in diameter). To provide a range of processing conditions, three different weights were selected and compacting was performed under five, different compacting pressures. The movement of the chips within the die during compacting was analysed through numerical simulations using Deform 2D software. Study of the compacting process optimal parameters for increasing the density and enhancing the density distribution were defined. The results from our study clearly show that optimal conditions are obtained when the proportion of D/h is 1/1.1. Moreover, it was recognized that in the process of small chips compacting, there was obtained lower density than in the case of large chips.</p>

Finite Element Analysis of the Effects of Coated Tool on High Speed Orthogonal Machining

2008 ◽  
Vol 392-394 ◽  
pp. 879-883
Author(s):  
Hui Xia Liu ◽  
H. Yan ◽  
Xiao Wang ◽  
Shu Bin Lu ◽  
K. Yang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Speed ◽  
Finite Element Models ◽  
Finite Element Code ◽  
Element Analysis ◽  
Orthogonal Machining ◽  
Coated Tool ◽  
Deform 2D ◽  
Updated Lagrangian

Two 3-D finite element models of coated tool and uncoated tool were established using the finite element code DEFORM-2D based on the updated Lagrangian formula. And their machinability on high speed orthogonal machining was simulated and compared. The investigation results indicate that the coated tool has higher surface temperature and lower inside temperature compared with the uncoated tool. Moreover, the cutting forces of the model using coated tool are lower than that using uncoated tool.

Scale Effect in FEM Simulation of Axisymmetric Hot Micro-Extrusion of Aluminum Alloys

2016 ◽  
Author(s):  
André L. M. Costa ◽  
Henry S. Valberg ◽  
Wojciech Z. Misiolek
Keyword(s):  
Scale Effect ◽  
Material Flow ◽  
Metal Flow ◽  
Fem Simulation ◽  
Numerical Code ◽  
Flow Curves ◽  
Axisymmetric Mode ◽  
Complex Shapes ◽  
Ram Speed ◽  
Deform 2D

Hot micro-extrusion is a good candidate for manufacturing metallic micro-components with complex shapes and good mechanical properties. This work investigates the metal flow in direct hot mini- and micro-extrusion of aluminum rods by means of FEM simulations. The presented study was performed with the numerical code DEFORM 2D in axisymmetric mode using experimental material flow curves for AA 7108 alloy. The mini-to-micro dimensional scale factor was 10:1, the extrusion ratios were 16 and 100, and the ram speed ranged from 0.5 to 20 mm/s. The initial temperature of the billet and tooling was 400°C. It was found that the temperature distribution within the profile changed from mini-to micro-extrusion and the effect was more significant for higher reductions and higher extrusion velocities. The micro-scale effect increased the stress field just behind the die orifice and the material deformed more intensely to achieve the equilibrium velocity. It was shown that the scale effect can be evaluated by the relative strain rates associated with the corresponding deformation. Numerical results indicate that the scale effect does increase exponentially with the velocity and it becomes significant for final exit velocities of the extrudate above the level of 100 mm/s.

scholarly journals Correction to: Using DEFORM-2D Software to Study Heat-Insulation Materials as Protection of Air Tuyeres Against Burnout

Metallurgist ◽  
2021 ◽  
Vol 64 (9-10) ◽  
pp. 1103-1103
Author(s):  
V. N. Titov ◽  
S. D. Saifullaev ◽  
M. M. Skripalenko ◽  
A. I. Ternovykh ◽  
A. A. Sidorov
Keyword(s):  
Heat Insulation ◽  
Insulation Materials ◽  
Deform 2D

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.

An Investigation on Effect of Residual Stress on Springback Behavior of High Strength Steel in U-Bending Process

2011 ◽  
Vol 189-193 ◽  
pp. 2864-2868
Author(s):  
Komgrit Lawanwong
Keyword(s):  
Residual Stress ◽  
Fem Simulation ◽  
Sheet Thickness ◽  
High Strength ◽  
Spring Back ◽  
Workpiece Material ◽  
Bending Process ◽  
Commercial Program ◽  
Deform 2D ◽  
Springback Behavior

Bending process is an important process in the metal sheet forming in many industries. The main problem of the bending process is the spring-back phenomenon after removing the punch. This research aims the investigation on effect of residual stress on springback behavior of sheet metal in U bending process. The corner setting technique and bottoming process were designed for experiments. The corner setting technique and bottoming has reduced the thickness in bending area to 5, 10, 15 and 20 percent of the original sheet thickness. Clearance between punch and die of both processes was equal to same the thickness. The residual stress value and springback phenomenal were investigated by commercial program code DEFORM 2D which was able to analyze the effect stress and force in bending area. Electrolytic zinc coated carbon steel grade JIS; SECC, JIS; 440 and JIS; 590 which having the thickness of 1 mm were employed as the workpiece material for all experiments. The result of three materials in conventional U bending die shows larger spring back than the corner setting technique and bottoming process. Moreover, the corner setting technique reduces spring back value in bending process but requires high bending force. Corner setting technique and bottoming process at 15% and 20% shows that the spring go of all parts. The FEM simulation results explained the effect of residual stress to springback phenomenal. Comparisons between experimental and finite element method results were also performed.

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