Hydraulic-pressure Augmented Deep Drawing with Fluid Assisted Blank Holder

2010 ◽  
Vol 46 (12) ◽  
pp. 76 ◽  
Author(s):  
Huiting WANG
Keyword(s):  
Deep Drawing ◽  
Hydraulic Pressure ◽  
Blank Holder

Thickness of Magnesium Alloy Square Parts in Hydraulic Deep Drawing

2013 ◽  
Vol 347-350 ◽  
pp. 1187-1191
Author(s):  
Xian Chang Mao ◽  
Lian Fa Yang ◽  
Yun Liu ◽  
Shi Yang Li
Keyword(s):  
Magnesium Alloy ◽  
Wall Thickness ◽  
Deep Drawing ◽  
Thickness Distribution ◽  
Hydraulic Pressure ◽  
Blank Holder Force ◽  
Technological Parameters ◽  
Cold Forming ◽  
Blank Holder ◽  
Technical Parameters

Forming effect of square parts is influenced greatly by technical parameters in hydraulic deep drawing, and it is significative to investigate the parameters. The technical parameters which influence the cold forming effect (wall thickness difference and minimum wall thickness) were introduced in detail by numerical simulation method, including the load method of blank holder force, drawing speed, hydraulic pressure, etc. Furthermore, the reasonable technological parameters were concluded and the wall thickness distribution of magnesium alloy square parts was discussed in this paper. The results show that the cold formability of AZ31B magnesium alloy square parts could be improved when adopt reasonable technological parameters and blank holder force load path in hydraulic deep drawing.

Determination of Proper Loading Profiles for Hydro-Mechanical Deep Drawing Process Using FEA

2014 ◽  
Vol 686 ◽  
pp. 540-548
Author(s):  
S.B. Akay ◽  
E.F. Şükür ◽  
M. Turkoz ◽  
S. Halkaci ◽  
M. Koç ◽  
...  
Keyword(s):  
Deep Drawing ◽  
Manufacturing Process ◽  
Sheet Material ◽  
Fluid Pressure ◽  
Process Conditions ◽  
Hydraulic Pressure ◽  
Drawing Ratio ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Force Profiles

Hydro-mechanical Deep Drawing (HMD) is an advanced manufacturing process developed to form sheet metal blanks into complex shapes with smooth surfaces using hydraulic pressure as an additional source of deformation force. There are many factors affecting the successful production of desired parts using this manufacturing process. The most important factors are the fluid pressure and blank holder force. Having proper values of these parameters during forming has a direct impact on part properties such as drawing ratio and thinning. In order to determine desired the fluid pressure and blank holder force profiles, which are different for every geometry, material and other process conditions, finite element simulations are conducted to save time and cost. Abaqus FEA software is used in this study. In order to define the continuously changing fluid pressure application area on the sheet material, which is not an available module or standard interface of software, sub-programs (sub-routines) are developed to properly and dynamically define the fluid pressure area. Proper, if not optimal, fluid pressure and blank holder force profiles, which allow the formability (LDR) of sheet material to be maximum, were obtained using trial and error method. Maximum thinning values on metal blank were used as a control parameter to determine if selected loading profiles result in the highest LDR with lowest thinning.

Paraboloid of Revolution Part Hydromechanical Deep Drawing and Finite Element Simulation of Stress Analysis

2011 ◽  
Vol 88-89 ◽  
pp. 679-683
Author(s):  
Yong Chang ◽  
Xiang Sheng Li ◽  
Rui Li Du
Keyword(s):  
Deep Drawing ◽  
Theory Of Elasticity ◽  
Hydraulic Pressure ◽  
Blank Holder Force ◽  
Forming Process ◽  
Load Curve ◽  
Blank Holder ◽  
Hydromechanical Deep Drawing ◽  
Element Simulation ◽  
Major Principal Stress

Theory of Elasticity and Plasticity was used to analyzed stress of different deformation zone of part in hydromechanical deep drawing (HDD). HDD is a kind of advanced sheet metal forming method. Satisfying the need of adornment parts and auto parts and aiming at paraboloid chimney HDD with initial inverse pressure and variable blank-holder forces was studied by means of numerical simulation. The dynamic explicit analytical software DYNAFORM was employed to simulate the forming process to obtain major principal stress of the material. The blank holder force and hydraulic pressure influence on forming were studied. The load curve of blank holder force (BHF) and hydraulic pressure were optimized.

Blank holder force optimisation strategy in deep drawing process

2007 ◽  
Vol 1 (2) ◽  
pp. 226 ◽  
Author(s):  
Hossam H. Gharib ◽  
Abdalla S. Wifi ◽  
Maher Y.A. Younan ◽  
Ashraf O. Nassef
Keyword(s):  
Deep Drawing ◽  
Drawing Process ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Deep Drawing Process

scholarly journals Development technique for deep drawing without blank holder to produce circular cup of brass alloy

2015 ◽  
Vol 4 (1) ◽  
pp. 187 ◽  
Author(s):  
Ali Hassan Saleh ◽  
Ammer Khalaf Ali
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Deep Drawing ◽  
Cone Angle ◽  
Element Model ◽  
Drawing Ratio ◽  
Clearance Ratio ◽  
Blank Holder ◽  
Half Cone ◽  
Half Cone Angle

Of this technique compared to the conventional deep drawing is that the circular cup can be carried out in single action press with limit In this paper a new mechanism for deep drawing was proposed to produce circular cup from thin plate without blank holder. In this technique the die assembly includes punch, die and die-punch. A 2D axisymmetric finite element model was built using DEFORM software. Effect of die geometry (half- cone angle) on maximum load, thickness distribution, strain distribution and effect of clearance ratio between punch and (die-punch) on the wrinkling of the cup were investigated. Three half-cone angles of die (15o, 30o and 45o) were used for forming sheet metal of brass (CuZn37) which had initial thickness of (1mm) at four clearance ratio (c/t) for die of 30o half-cone angle. Finite element model results showed good agreement with experimental results. Die of 30o half-cone angle with clearance ratio (c/t) of 0.9 gave the best product without wrinkling. The main advantage drawing ratio (LDR) of 1.86 and blank diameter to blank thickness ratio (d/t) < 86.

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.

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