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

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.

Plasma plume oscillations during welding of thin metal sheets with a CW CO2laser

2000 ◽  
Vol 34 (2) ◽  
pp. 189-199 ◽  
Author(s):  
Z Szymanski ◽  
J Hoffman ◽  
J Kurzyna
Keyword(s):  
Plasma Plume ◽  
Thin Metal ◽  
Metal Sheets

Formation of slip traces during recrystallization of thin metal sheets

1995 ◽  
Vol 71 (6) ◽  
pp. 1241-1253 ◽  
Author(s):  
Hui Lin ◽  
D. P. Pope
Keyword(s):  
Thin Metal ◽  
Metal Sheets ◽  
Slip Traces

Laminated Constructions on the Basis of Thin Metal Sheets in Building

1999 ◽  
pp. 415-422
Author(s):  
Chistyakov A.M. ◽  
Rass F.V. ◽  
Konovalov P.N. ◽  
Chernoivan N.V.
Keyword(s):  
Thin Metal ◽  
Metal Sheets

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.

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