Comparison of Conventional Deep Drawing, Hydromechanical Deep-Drawing and High Pressure Sheet Metal Forming by Numerical Experiments

2005 ◽  
Author(s):  
I. Erkan Önder
Keyword(s):  
High Pressure ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Numerical Experiments ◽  
Hydromechanical Deep Drawing

Multi-Step Forward Finite Element Method for the Numerical Simulation of Sheet Metal Forming

2011 ◽  
Vol 474-476 ◽  
pp. 251-254
Author(s):  
Jian Jun Wu ◽  
Wei Liu ◽  
Yu Jing Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Mapping Method ◽  
Constitutive Relationship ◽  
Element Method

The multi-step forward finite element method is presented for the numerical simulation of multi-step sheet metal forming. The traditional constitutive relationship is modified according to the multi-step forming processes, and double spreading plane based mapping method is used to obtain the initial solutions of the intermediate configurations. To verify the multi-step forward FEM, the two-step simulation of a stepped box deep-drawing part is carried out as it is in the experiment. The comparison with the results of the incremental FEM and test shows that the multi-step forward FEM is efficient for the numerical simulation of multi-step sheet metal forming processes.

In-Process Visualisation for Deformation Monitoring and Analysis of Sheet Metal Forming Processes

2013 ◽  
Vol 677 ◽  
pp. 384-387 ◽  
Author(s):  
Wai Kei Ricky Kot ◽  
Luen Chow Chan
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Deformation Process ◽  
Deformation Monitoring ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
Profile Data ◽  
Profile Change

In this paper, a visualisation system will be discussed that can be used to capture the deformation profile of the sheet blank during sheet metal forming processes, such as deep drawing and shape forming. The visualisation system utilizes a 2D laser displacement sensor for deformation profile acquisition. The sensor is embedded in the die and the laser propagates through the die to detect the profile change of the specimen concealed in the die during operation. The captured profile data will be collected, manipulated and transferred to a monitor for display via a controller. This visualisation of the deformation profile will provide engineers and researchers with an intuitive means of analysing and diagnosing the deformation process during sheet metal forming.

Mg sheet metal forming: Lessons learned from deep drawing Li and Y solid-solution alloys

JOM ◽  
2006 ◽  
Vol 58 (5) ◽  
pp. 62-69 ◽  
Author(s):  
Sean R. Agnew ◽  
Jeremy W. Senn ◽  
Joseph A. Horton
Keyword(s):  
Solid Solution ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Lessons Learned

Off-Line Testing of Tribo-Systems for Sheet Metal Forming Production

2014 ◽  
Vol 966-967 ◽  
pp. 3-20 ◽  
Author(s):  
Niels Bay ◽  
Ermanno Ceron
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Normal Pressure ◽  
Environmentally Benign ◽  
Interface Pressure ◽  
Test Conditions ◽  
Interface Contact ◽  
Very High

Off-line testing of new tribo-systems for sheet metal forming production is an important issue, when new, environmentally benign lubricants are to be introduced. To obtain useful results it is, however, vital to ensure similar conditions as in the production process regarding the main tribo-parameters, which are tool/workpiece normal pressure, sliding length, sliding speed and interface contact temperature. The paper describes a generic methodology for such tests exemplified on an industrial, multistage deep drawing example, where deep drawing is followed by two successive re-drawing operations leading to very high tool/workpiece interface pressure and temperature in the second re-draw. Under such conditions only the best lubricant systems work satisfactory, and the paper shows how the performance of different tribo-systems in production may be predicted by off-line testing combined with numerical modelling in order to ensure proper test conditions.

scholarly journals Modelling real contact areas caused by material straining effects in sheet metal forming simulation

2021 ◽  
Author(s):  
Peter Essig ◽  
Mathias Liewald ◽  
Maximilian Burkart ◽  
Maxim Beck
Keyword(s):  
Sheet Metal ◽  
Surface Pressure ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Forming Simulation ◽  
Contact Areas ◽  
Surface Pressure Distribution

Shortened product development processes in automotive industry combined with the upcoming lack of experts do challenge sheet metal part production fundamentally. Tryout time and manufacturing costs of large forming dies today are significantly influenced by their digitally supported engineering. The forming process by such tools is beside other influences is affected by elastic deformations of forming dies and press structure as well as contact areas between die and sheet metal part. In deep drawing such contact areas are influenced by the blank properties and the flange behavior in terms of thickening and thinning. Recent developments in sheet metal forming simulation do consider advanced friction models and structural modeling of die and press components improving simulation accuracy. Nevertheless thinning or thickening of sheet metal results into localized surface pressure distribution during deep drawing. For this reason, it is not sufficient to use the currently common practice of homogeneous surface pressure distribution in sheet metal forming simulation. In this respect, this paper presents a numerical approach for consideration of straining effects in the sheet metal part during forming operation. For this purpose, a systematic process improvement was developed in this paper to identify contact areas via a numeric simulation parameter. Validating the numerical investigation, a rectangle cup die is used, considering major strain. The main results of this contribution for that reason show how simulated contact areas can be estimated by reverse engineering of real forming parts. Hereby straining based contact areas lead to a novel contact area design in process planning, resulting in efficient die tryout.

Research Status of High-Pressure Water Jet Incremental Sheet Metal Forming and Research on a New Method of the Straight-Walled Sheet Metal Part Forming

2012 ◽  
Vol 217-219 ◽  
pp. 2093-2096
Author(s):  
Ling Yun Zhang ◽  
Peng Yuan
Keyword(s):  
High Pressure ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Water Jet ◽  
Sheet Metal Part ◽  
Metal Part ◽  
Incremental Sheet Metal Forming ◽  
Pressure Water ◽  
High Pressure Water Jet

The basic theory, process characteristics and advantages of high-pressure water jet incremental sheet metal forming were introduced. International research progresses in this field were summarized. The difficulty of straight-walled sheet metal part forming was analyzed, and a new method was researched, the result shows that the solution by regulating the contact angle which between sheet metal and water jet is practicable. The future developments were prospected.

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