scholarly journals A coupled electric–magnetic numerical procedure for determining the electromagnetic force from the interaction of thin metal sheets and spiral coils in the electromagnetic forming process

2015 ◽  
Vol 39 (1) ◽  
pp. 309-321 ◽  
Author(s):  
E. Paese ◽  
M. Geier ◽  
R.P. Homrich ◽  
R. Rossi
Keyword(s):  
Electromagnetic Force ◽  
Numerical Procedure ◽  
Electromagnetic Forming ◽  
Thin Metal ◽  
Forming Process ◽  
Metal Sheets ◽  
Spiral Coils

scholarly journals Investigation of a partial, inductive short-time heat treatment of thin metal sheets integrated into the forming process

2018 ◽  
Vol 190 ◽  
pp. 12008
Author(s):  
Benjamin Clausius ◽  
Petra Maier
Keyword(s):  
Heat Treatment ◽  
Strain Hardening ◽  
Sheet Thickness ◽  
Local Strain ◽  
Single Step ◽  
Thin Metal ◽  
Recrystallization Annealing ◽  
Forming Process ◽  
Metal Sheets ◽  
Short Time

Flanging is a widespread method in the sheet metal working industry to connect same or different materials by forming. Especially the sealing technology makes high demands on the flanging process: a low sheet thickness of the inner eyelet is necessary for proper sealing. The outer edges of the neck rings are mostly manufactured by shear cutting. The quality of the cut surface and the level of the local strain hardening influence decisively the limit of the flanging process by possible cracking. This paper is focused on the dependencies of these factors regarding thin metal sheets of different materials with a thickness down to 100 μm. It could be shown that strain hardening has a stronger effect on the process limits compared to the notch effect of the sheet edges when using standard values for the clearance of the shear cutting tool. Furthermore, a process is investigated with a partial inductive short-time heat treatment of the most deformed edge area. Due to the low thickness of the material and low heat capacities related thereto, it is possible to integrate a recrystallization annealing as single step into the forming process. As a result, the strain hardening can be removed from the affected zone directly between two forming steps to increase the process limits.

Calculation of electromagnetic force in electromagnetic forming process of metal sheet

2010 ◽  
Vol 107 (12) ◽  
pp. 124907 ◽  
Author(s):  
Da Xu ◽  
Xuesong Liu ◽  
Kun Fang ◽  
Hongyuan Fang
Keyword(s):  
Electromagnetic Force ◽  
Electromagnetic Forming ◽  
Metal Sheet ◽  
Forming Process

scholarly journals Electromagnetic Forming Analysis of the Al 99.0 Sheet with Tools of Different Configurations

2019 ◽  
Vol 290 ◽  
pp. 03010
Author(s):  
Dorin Luca ◽  
Cristina Biriş ◽  
Dorian Luca
Keyword(s):  
Electromagnetic Forming ◽  
Forming Process ◽  
Spiral Coil ◽  
Maximum Deformation ◽  
Manufacturing Procedure ◽  
Forming Analysis ◽  
Deformation Force ◽  
Spiral Coils ◽  
Flat Spiral ◽  
The Mathematical Model

Electromagnetic forming is an advanced manufacturing procedure, characterized by the fact that the tool carrying the deformation force does not touch the workpiece. This paper presents research regarding the electromagnetic forming of Al 99.0 (EN AW-1200) sheet with coils, having different configurations. The purpose of the research was to find the flat spiral coil configuration that ensures maximum deformation of the workpiece. Flat spiral coils with different gaps between the coil and the workpiece, and coils with different number of windings were tested. The influence of these parameters was monitored on the maximum strain of the free bulged parts. The analysis of the results obtained for different configurations of the flat spiral coils allowed the selection of the significant parameters that influenced the electromagnetic forming process of the Al 99.0 flat workpiece, which aimed to elaborate the mathematical model and to optimize the investigated process.

Numerical Analysis of the Workpiece Velocity in Electromagnetic Forming Process

2011 ◽  
Vol 314-316 ◽  
pp. 634-638
Author(s):  
Li Qiu ◽  
Yi Liang Lv ◽  
Cheng Xi Jiang ◽  
Xiao Tao Han ◽  
Liang Li
Keyword(s):  
Numerical Analysis ◽  
Kinetic Energy ◽  
Differential Equations ◽  
Electromagnetic Force ◽  
Electrical Energy ◽  
Electromagnetic Forming ◽  
Forming Process ◽  
Conservation Of Energy ◽  
The Law

The effect of the motional electromagnetic force in the electromagnetic forming circuit on the workpiece velocity is analyzed. The differential equations of unconsidering and considering the motional electromagnetic force in the electromagnetic forming circuit are solved numerically. The results without considering the motional electromagnetic force are unavailable because they violate the law of conservation of energy, while the results with considering the motional electromagnetic force can accurately reflect the electromagnetic forming process. Furthermore, it is found that the electrical energy transforms into the kinetic energy due to the motional electromagnetic force.

Electromagnetic forming of thin metal sheets

2000 ◽  
Vol 36 (4) ◽  
pp. 1808-1811 ◽  
Author(s):  
A. Meriched ◽  
M. Feliachi ◽  
H. Mohellebi
Keyword(s):  
Electromagnetic Forming ◽  
Thin Metal ◽  
Metal Sheets

Coil-less electromagnetic forming process with uniform-pressure characteristics for shaping sheet metals

2021 ◽  
Vol 70 ◽  
pp. 140-151
Author(s):  
Quanliang Cao ◽  
Xian Li ◽  
Zhenhao Li ◽  
Limeng Du ◽  
Liangyu Xia ◽  
...  
Keyword(s):  
Electromagnetic Forming ◽  
Uniform Pressure ◽  
Sheet Metals ◽  
Forming Process ◽  
Pressure Characteristics

scholarly journals Incremental Hole-Drilling Method Vs. Thin Components: A Simple Correction Approach

2014 ◽  
Vol 996 ◽  
pp. 283-288 ◽  
Author(s):  
Esther Held ◽  
Simone Schuster ◽  
Jens Gibmeier
Keyword(s):  
Residual Stress ◽  
Thin Metal ◽  
Hole Drilling ◽  
Depth Profiles ◽  
Hole Drilling Method ◽  
Incremental Hole Drilling ◽  
Metal Sheets ◽  
Drilling Method ◽  
Measured Strain ◽  
The Impact

The incremental hole-drilling method is a widely used technique to determine residual stress depth profiles in technical components. Its application is limited in respect to the components geometry, for instance the components thickness. In this paper, a direct correction of the measured strain relaxations is proposed to consider the impact of deviant geometries, here the component thickness, on the residual stress evaluation that moreover, allows the application of commercially available evaluation software. The herein proposed approach is based on finite element simulation of the incremental hole drilling. The simulated strain relaxations for thin metal sheets are evaluated with an algorithm as used in commercially available evaluation software (i) for uncorrected data as well as (ii) for strain data corrected by the proposed correction procedure. It is shown that the correction approach leads to a significant improvement of the measurement accuracy. Further, by means of the approach residual stress depth profiles in thin metal sheets can be as usual determined using commercial evaluation software for the incremental hole-drilling method regardless of the algorithm used, i.e. differential or integral.

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