Numerical Simulation of Deep-Drawing Processes of Square Cup under Bilateral Constrained Conditions

2011 ◽  
Vol 189-193 ◽  
pp. 2892-2896 ◽  
Author(s):  
Xiao Ting Xiao ◽  
Li Cheng Huang ◽  
Yi Juan Liao ◽  
Li Guang Tan ◽  
Qiao Yu Chen
Keyword(s):  
Numerical Simulation ◽  
Friction Coefficient ◽  
Deep Drawing ◽  
Material Flow ◽  
Flow Rule ◽  
Blank Holder Force ◽  
Analysis Software ◽  
Blank Holder ◽  
Advanced Analysis ◽  
Constrained Conditions

In this paper, the flow rule of metal during the deep drawing of the non-symmetry workpieces was investigated by means of the numerical simulation of deep-drawing processes of square cup under bilateral constrained conditions. The numerical simulation was carried out by advanced analysis software Dynaform5.5. SUS304 stainless steel was used as the deforming materials. The influence of different friction coefficient and blank holder force on the drawing forming quality was analyzed. The results showed that the material flow in different areas has different trends with increase of friction coefficient and blank holder force.

scholarly journals Experimental Study and Analysis of the Influence of Drawbead against Restriction and Deep Drawing Force of Rectangular Cup-Cans with Tin Plate Material

2013 ◽  
Vol 315 ◽  
pp. 246-251 ◽  
Author(s):  
Susila Candra ◽  
I. Made Londen Batan
Keyword(s):  
Deep Drawing ◽  
Material Flow ◽  
Radial Stress ◽  
Steel Sheet ◽  
Plate Material ◽  
Drawing Force ◽  
Blank Holder Force ◽  
Blank Holder ◽  
In The Beginning ◽  
Restraining Force

Drawbead are often used to control the flow of material, stress and deep drawing force in the flange area. This paper discussed the drawbead (fully, not fully and without drawbead) that combined with variations in the blank holder force against restriction of material flow and drawbead restriction force of deep drawing with palm oil lubrication. In this paper, analytical and experiments are used to predict the drawbead restraining and deep drawing force. The tin steel sheet with a thickness of 0.2 mm is used as speciment. The results obtained, that the application fully drawbead be very effective in controlling the flow of materials in the flange, as compared to not fully and without drawbead. In the beginning of the process (punch stroke < 4 mm), the magnitude of restraining force and deep drawing force can be increased. And, the magnitude of Radial Stress increases, conversely the magnitude of tangential stress decreased. This can prevent the occurrence optimum blank holder force is recommended in range 4394-8788 N. Comparisons of results between the analysis and experiments show the phenomenon is similar.

Study of the Parameters of Deep Drawing Process Based on the Simulation of Dynaform

2012 ◽  
Vol 249-250 ◽  
pp. 51-58
Author(s):  
Qing Wen Qu ◽  
Tian Ke Sun ◽  
Shao Qing Wang ◽  
Hong Juan Yu ◽  
Fang Li
Keyword(s):  
Friction Coefficient ◽  
Sheet Metal ◽  
Deep Drawing ◽  
Drawing Process ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Deep Drawing Process ◽  
Drawing Die ◽  
Drawing Speed

A simulation of deep drawing process on the sheet metal was done by using Dynaform, the influence of blank holder force, deep drawing speed and friction coefficient on the forming speed of sheet metal in the deep drawing process were got. The forming speed of sheet metal determines the quality of deep drawing, in the deep drawing process the blank holder force and the deep drawing speed are controllable parameters, the friction coefficient can be intervened and controlled, and it’s a manifestation of the interaction of all parameters, the main factors which influence the friction coefficient just have blank holder force, deep drawing speed and lubrication except the material. The conclusion of this study provides the basic data for the analysis of the lubrication of mould, the study of lubricant and the prediction of the service life of deep drawing die.

Numerical Simulation of Stamping Forming for an Automobile Reinforced Plate Based on Orthogonal Test

2012 ◽  
Vol 602-604 ◽  
pp. 1899-1902
Author(s):  
Ming Wei Wang ◽  
Long Chen ◽  
Xiu Jun Zhao ◽  
Shu Li
Keyword(s):  
Numerical Simulation ◽  
Friction Coefficient ◽  
Analysis Of Variance ◽  
Process Parameters ◽  
Orthogonal Test ◽  
Blank Holder Force ◽  
Optimal Process ◽  
Blank Holder ◽  
Reinforced Plate ◽  
Result Analysis

The effects of stamping process parameters (blank thickness, blank holder force, friction coefficient, die clearance) on the formability of an automobile reinforced plate were investigated. The process parameters are optimized based on the results of orthogonal testing. The optimal process parameters were obtained by simulation result analysis of variance. The accuracy of numerical simulation is verified by the experiment, which provides guidance for the actual production.

Numerical Simulation of Square Cup Deep-Drawing Process under the Different Constraint Degrees Condition

2011 ◽  
Vol 239-242 ◽  
pp. 2225-2228
Author(s):  
Xiao Ting Xiao ◽  
Li Cheng Huang ◽  
Yi Juan Liao
Keyword(s):  
Numerical Simulation ◽  
Deep Drawing ◽  
Drawing Process ◽  
Analysis Software ◽  
Deep Drawing Process ◽  
Forming Quality ◽  
Advanced Analysis

In this paper, numerical simulation of square cup deep-drawing process under the different constraint degrees condition was investigated by means of advanced analysis software Dynaform5.5. The influence of different constraint degrees on the forming quality were analyzed by taking the inflow volume while parts forming 120mm as standard. The results showed that the effect of the uneven flow and deformation of metal have become bigger and bigger with the increase of constraint degrees. The rounded area at the bottom of square cup is no longer the most easy broke location, and the thickness of long side reduce little and uniform than other place.

Finite Element Analysis of the Effect of Blank Holder Force on Deep Drawing of Bottom of Vacuum Flask

2011 ◽  
Vol 335-336 ◽  
pp. 483-486
Author(s):  
Liu Ru Zhou ◽  
Xian Wen Hu
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Deep Drawing ◽  
Blank Holder Force ◽  
Element Analysis ◽  
Blank Holder ◽  
Finite Element Software

Numerical simulation of deep drawing of bottom of vacuum flask is made by means of finite element software ANSYS/LS-DYNA and the potential defect was analyzed. The influence of the blank holder force on deep drawing quality is discussed .The results show that the maximal value of stress and thickness appears in the round corners of die .The maximal increased thickness is sheet flange and the maximal thinning is the round corners of punch. The larger is the blank holder force, the less equal is the thickness and the poorer deep drawing quality.

Numerical Simulation of Warm Deep Drawing of AZ31 Magnesium Alloy Sheet with Variable Blank Holder Force

2007 ◽  
Vol 340-341 ◽  
pp. 639-644 ◽  
Author(s):  
Ying Hong Peng ◽  
Qun Feng Chang ◽  
Da Yong Li ◽  
Hu Jie ◽  
Xiao Qin Zeng
Keyword(s):  
Numerical Simulation ◽  
Magnesium Alloy ◽  
Deep Drawing ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Magnesium Alloy Sheet ◽  
Variable Blank Holder Force ◽  
Az31 Magnesium Alloy Sheet

Blank holder force (BHF) plays an important role in sheet metal forming. Previous studies demonstrated that variable blank holder forces can improve the cold formability of steel blank, but the research on the application of variable blank holder force in warm forming of magnesium sheet forming has not been well investigated. In this study, the mechanical property of AZ31 magnesium alloy sheet is measured through some uniaxial tensile tests. In order to obtain the variational rule of the BHF, a mathematical model of BHF is deduced based on the energy theory. The variational rule of the BHF over the punch stroke is analyzed. Finally, three profiles of the BHF curve are designed, and the numerical simulation of warm deep drawing process of magnesium alloy sheet is also performed. A suitable variable blank holder force scheme is obtained through comparison among three results of simulation. The simulation indicates that the limiting drawing ratio of AZ31 magnesium alloy sheet can be improved from 3.0 to 3.5 with the suitable blank holder force varied by an inverted V curve.

Closed-Loop-Control of the Material Flow in the Deep Drawing Process

2005 ◽  
Vol 6-8 ◽  
pp. 321-328 ◽  
Author(s):  
Bernd Arno Behrens ◽  
J.W. Yun ◽  
M. Milch
Keyword(s):  
Deep Drawing ◽  
Material Flow ◽  
Closed Loop ◽  
Fuzzy Controller ◽  
Control Variable ◽  
Drawing Process ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Deep Drawing Process ◽  
Loop Control

In this paper, a concept of a closed-loop-control system for the material flow in deep drawing processes based on a fuzzy-controller is presented. The deep drawing process is influenced by different variables as batch dependent material values, machine parameters as well as variations in the forming tools. Process stability can be improved by continuous process monitoring and process control. The control loop for controlling the material flow consists of an optical sensor, a deep drawing tool with an elastic blank holder, a fuzzy controller and a deep drawing press with a multi point drawing cushion. The controlled variable (material flow) was measured contact-free and on-line by means of an optical sensor developed at the IFUM. As control variable the different lokal blank holder forces were chosen in order to influence the material flow in different areas. In order to combine the controlled variable (material flow) and the control variable (lokal blank holder force) a fuzzy logic controller was designed. The performance of the material flow control was investigated by generating disturbances (e.g. a high blank holder force at the beginning) in the deep drawing process. This procedure shows that the fuzzy-controlled material flow can be compensated for the disturbances by means of changing the blank holder force.

Stress Analysis and Formability of Sheets in Semi-Ball Bottom Cylindrical Deep Drawing

2010 ◽  
Vol 148-149 ◽  
pp. 721-727
Author(s):  
Kang Chen ◽  
Tao Zhou ◽  
Cheng Yun Peng ◽  
Yuan Fang Chen
Keyword(s):  
Friction Coefficient ◽  
Mathematical Modelling ◽  
Stress Analysis ◽  
Experimental Method ◽  
Deep Drawing ◽  
Processing Parameters ◽  
Forming Limit ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Simulation Based

Semi-ball bottom cylindrical deep drawing is different from the traditional deep drawing, since it is not only characteristics of traditional drawing, but also of bulging. According to the semi-ball bottom cylindrical deep drawing features, the stress conditions of the sheet in different regions have been analyzed by a mathematical modelling. In addition, the effects of processing parameters on the forming limit of the sheet in semi-ball bottom cylindrical deep drawing have been investigated by experimental method and simulation based on dynaform, respectively. It is found that the experimental results are consistent to that in simulation and the results show that the formability of the sheet is influenced greatly by the blank holder force, friction coefficient and thickness. With the blank holder force and friction coefficient decreasing and the thickness increasing, the bulging area can be expanded, which is beneficial to the improvement of the forming limit height of the semi-ball bottom cylindrical deep drawing parts.

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