Isoviscous Hydrodynamic Lubrication of Deep Drawing and Its Comparison With Experiment

1993 ◽  
Vol 115 (1) ◽  
pp. 111-118 ◽  
Author(s):  
S. M. Mahdavian ◽  
Z. M. Shao
Keyword(s):  
Film Thickness ◽  
Deep Drawing ◽  
Hydrodynamic Lubrication ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Blank Holder ◽  
Comparison With Experiment ◽  
Force Ratio ◽  
Theoretical Predictions ◽  
Metal Blank

An analytical model for the isoviscous hydrodynamic lubrication of deep drawing is developed. The model covers the complete drawing stages from sheet metal blank to the drawn cup-shaped product. Equations to calculate the film thickness, radial, and drawing stresses related to the blank holder squeezing action are presented. Theoretical predictions of both film thickness and drawing force ratio for lubricated, low carbon steel are compared with experimental measurements.

scholarly journals b EXPERIMENTAL AND FINITE ELEMENT ANALYSIS OF SQUARE DEEP DRAWING PROCESS FOR LAMINATED STEEL-BRASS SHEET METALS

2020 ◽  
Vol 20 (1) ◽  
pp. 12-24
Author(s):  
Hani Aziz Ameen
Keyword(s):  
Deep Drawing ◽  
Thickness Distribution ◽  
Low Carbon Steel ◽  
High Strength ◽  
Experimental Tests ◽  
Drawing Process ◽  
Low Carbon ◽  
Element Analysis ◽  
Blank Holder ◽  
Deep Drawing Process

In this paper, the drawability of two-layer (steel-brass) sheets to produce square cup, is investigated through numerical simulations, and experimental tests. Each material has its own benefits and drawbacks in terms of its physical, chemical and mechanical properties, so that the point of this investigation is taking the benefits of different materials, like (low density, high strength and resistibility of corrosion), at the same time and in a one part. ANSYS18 software is used to simulate the deep drawing process of laminated sheet. The deep drawing processes for square cup were carried out under various blank holder loads with different lubrication conditions (dry and lubricant) and with variable layer arrangement. The materials were low carbon steel st1008 and brass CuZn30 sheets with thickness of 0.5mm0and 0.58mm respectively. The thickness of laminated sheet blank was 1.1 mm and its diameter was 83 mm. The drawn cups with less imperfections and satisfactory thickness distribution were formed in this study. It is concluded the greatest thinning appear in the corner of the cup near the punch radius due to extreme stretching take place in this area. Experimental forming load, blank holder load, and thickness distribution are compared with simulation results. Good agreement between experimental and numerical is evident.

scholarly journals Simulation of Semi-Active the Blank Holder Force Control to Prevent Wrinkling and Cracking in Deep Drawing Process

2014 ◽  
Vol 493 ◽  
pp. 473-479 ◽  
Author(s):  
Susila Candra ◽  
I. Made Londen Batan ◽  
Wajan Berata ◽  
Agus Sigit Pramono
Keyword(s):  
Carbon Steel ◽  
Force Control ◽  
Deep Drawing ◽  
Low Carbon Steel ◽  
Failure Criteria ◽  
Deformation Condition ◽  
Low Carbon ◽  
Blank Holder Force ◽  
Force System ◽  
Blank Holder

This paper presents simulation of drawing force and thickness deformation in deep drawing which employs semi-active blank holder force system, to solve the problem of cracking and wrinkling. The method of slab with feed back control failure criteria, was employed to make the modeling system and the semi-active blank holder to prevent wrinkling and cracking in forming low carbon steel sheet, without lubrication (μ=0.4). In this study, the mechanical properties of the material were chosen since that they equivalent to those of low carbon steel with its thickness of 0.2 mm, k = 572 N/mm2, UTS = 391 N/mm2, yield stress = 309 N/mm2 and n = 0.2. The diameter and the depth of the cylindrical cup-shaped product were 40 mm and 10 mm, respectively. Results from simulation have shown that the semi-active blank holder system can control very responsive against changing of deformation condition. The optimum of initial blank holder force is approximately 3000 N up to 4000 N. In the early stages (initial stroke), blank holder force system could be responsive to prevent cracking, and at the end of the punch stroke, it is very effective to prevent wrinkling. Simulation of semi-active blank holder force control system is excellent in model formation to prevent cracking and wrinkling.

scholarly journals Simulation of Metal Flow to Investigate the Application of Antilock Brake Mechanic System in Deep Drawing Process of Cup

2013 ◽  
Vol 789 ◽  
pp. 367-372 ◽  
Author(s):  
Susila Candra ◽  
I. Made Londen Batan ◽  
Agus Sigit Pramono ◽  
Bambang Pramujati
Keyword(s):  
Deep Drawing ◽  
Metal Flow ◽  
Low Carbon Steel ◽  
Drawing Process ◽  
Low Carbon ◽  
Drawing Force ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Deep Drawing Process ◽  
Cylindrical Cup

This paper presents the importance of simulation of metal flow in deep drawing process which employs an antilock brake mechanic system. Controlling the force and friction of the blank holder is imperative to assure that the sheet metal is not locked on the blank holder, and hence it flows smoothly into the die. The simulation was developed based on the material displacement, deformation and deep drawing force on flange in the radial direction, that it is controlled by blank holder with antilock brake mechanic system. The force to blank holder was applied periodically and the magnitude of force was kept constant during simulation process. In this study, the mechanical properties of the material were choses such that they equivalent to those of low carbon steel with its thickness of 0.2 mm. The diameter and the depth of the cylindrical cup-shaped product were 40 mm and 10 mm, respectively. The simulation results showed that the application of antilock brake mechanic system improves the ability to control the material flow during the drawing process, although the maximum blank holder force of 13000 N was applied. The optimum condition was found when the drawing process was performed using blank holder force of 3500 N, deep drawing force of 7000 N, friction coefficient of 0.25 and speed of punch stroke of 0.84 mm/sec. This research demonstrated that an antilock brake mechanic system can be implemented effectively to prevent cracking in deep drawing process.

WEIRKOTE PLUS

Alloy Digest ◽  
1987 ◽  
Vol 36 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Carbon Steel ◽  
Physical Properties ◽  
Deep Drawing ◽  
Sheet Steel ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Steel Corp ◽  
Coated Sheet

Abstract WEIRKOTE PLUS is a Galfan-coated sheet steel. The sheet is conventional low-carbon steel normally used for galvanized sheets and strip. This digest will concentrate on the characteristics and properties of the Galfan coating which is nominally a 95% zinc-5% aluminum alloy. The coating on Weirkote Plus is ideal for a variety of tough applications. It is excellent for products that require deep drawing and it combines extra corrosion resistance with superior formability. This datasheet provides information on composition and physical properties. It also includes information on corrosion resistance as well as forming, joining, and surface treatment. Filing Code: Zn-41. Producer or source: Weirton Steel Corp.

Wire rod of boron-bearing low-carbon steel for direct deep drawing

Metallurgist ◽  
2004 ◽  
Vol 48 (11-12) ◽  
pp. 626-634 ◽  
Author(s):  
V. V. Parusov ◽  
A. B. Sychkov ◽  
M. A. Zhigarev ◽  
A. V. Perchatkin
Keyword(s):  
Carbon Steel ◽  
Deep Drawing ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Wire Rod
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