High velocity electromagnetic forming can lead to better formability along with additional benefits. The spatial distribution of forming pressure in electromagnetic forming can be controlled by the configuration of the actuator. A new type of actuator is discussed which gives a uniform pressure distribution in forming. It also provides a mechanically robust design and has a high efficiency for flat sheet forming. A simplified analysis of the actuator is presented that helps in the design of the system. Examples of uses of the actuator are then presented, specifically with regards to forming shapes and surface embossing. Some practical challenges in the design of the actuator are also addressed. This paper emphasizes the approaches and engineering calculations required to effectively use this actuator.

Issue Section:
Technical Papers
Keywords:
electromagnetic actuators, forming processes, sheet metal processing
Topics:
Actuators, Pressure, Capacitors
1.
Daehn
,
G. S.
, 2003, “
High Velocity Metal Forming
,”
ASM Handbook Forming and Forging
,
ASM
,
Metals Park, OH
, to be published.
2.
Daehn
,
G. S.
, 2005, “
Electromagnetically Assisted Stamping—A Vision of a Future for Metal Forming
,” University of Dortmund, Dortmund, Germany, www.osu.edu/hyperplasticitywww.osu.edu/hyperplasticity
3.
Risch
,
D.
,
Beerwald
,
C.
,
Brosius
,
A.
, and
Kleiner
,
M.
, 2004 “
On the Significance of the Die Design for Electromagnetic Sheet Metal Forming
,”
Proceedings of the Ist International Conference on High Speed Forming
, pp.
191
–
200
.
4.
Belyy
,
L. V.
,
Fertik
,
S. M.
, and
Khimenko
,
L. T.
, 1996,
Electromagnetic Metal Forming Handbook
, M. M. Altynova and Glenn S. Daehn, translators, www.osu.edu/hyperplasticitywww.osu.edu/hyperplasticity
5.
Batygin
,
Y. V.
, and
Daehn
,
G. S.
, 1999,
The Pulse Magnetic Fields for Progressive Technologies
, www.osu.edu/hyperplasticitywww.osu.edu/hyperplasticity
6.
Al Hassani
,
S. T. S.
,
Duncan
,
J. L.
, and
Johnson
,
W.
, 1969, “
Techniques for Designing Electromagnetic Forming Coils
,”
Proceedings 2nd International Conference on High Rate Forming
, CO, pp.
5.1.2
–
5.1.16
.
7.
Kato
,
T.
, and
Tobe
,
S.
, 1988, “
High-Speed Forming of Metal Sheets by Electromagnetic Force
,”
JSME Int. J., Ser. III
0914-8825,
31
(
1
), pp.
142
–
148
.
8.
Fenton
,
G. K.
, 1996, M. S. thesis, The Ohio State University, Columbus, OH.
9.
Magneform, Inc., 2005, April, www.magneform.comwww.magneform.com
10.
Rocoil Rogowski Coil Company, 2005, April, http://homepage.ntlworld.com/rocoilhttp://homepage.ntlworld.com/rocoil
11.
Kamal
,
M.
, 2005, Ph.D. dissertation, The Ohio State University, Columbus, OH.
12.
Moon
,
F. C.
, 1984,
Magneto-Solid Mechanics
,
Wiley
,
New York
.
13.
Daehn
,
G. S.
, 2005, “
First Order Analysis of Electromagnetic Forming Procedures
,” www.hyperplasticity.comwww.hyperplasticity.com, April.
14.
Feynman
,
R. P.
,
Leightman
,
R. B.
, and
Sands
,
M. L.
, 1989,
The Feynman Lectures on Physics
,
Addison–Wesley
,
Reading, MA
, Chap. 17.
15.
Grover
,
F. W.
, 1946,
Inductance Calculations: Working Formulas and Tables
,
Van Nostrand
,
New York
.
16.
Jablonski
,
J.
, and
Winkler
,
R.
, 1978, “
Analysis of the Electromagnetic Forming Process
,”
Int. J. Mech. Sci.
0020-7403,
20
(
5
), pp.
315
–
325
.
Crossref
Search ADS
 
17.
Gourdin
,
W. H.
, 1989, “
Analysis and Assessment of Electromagnetic Ring Expansion as a High-Strain-Rate Test
,”
J. Appl. Phys.
0021-8979,
65
(
2
), pp.
411
–
422
.
Crossref
Search ADS
 
18.
Seth
,
M.
, 2003, M.S. Thesis, The Ohio State University, Columbus, OH.
19.
Seth
,
M.
, and
Daehn
,
G.
, 2005, “
Effect of Aspect Ratio on High Velocity Formability of Aluminum Alloy
,”
Trends in Materials and Manufacturing Technologies for Transportation Industries
,
TMS
,
Warrendale, PA
.
20.
Ike
,
H.
, and
Plancak
,
M.
, 1998, “
Coining Process as a Means of Controlling Surface Microgeometry
,”
J. Mater. Process. Technol.
0924-0136,
80
(
1
), pp.
101
–
107
.
21.
Holm
,
R.
, 1961,
Electrical Contacts—Theory and Applications
,
Springer-Verlag
New York
.
22.
Slade
,
P. G.
, 1999,
Electrical Contacts—Principles and Applications
,
Marcel Dekker
,
New York
.
23.
Wagar
,
H. N.
, 1971, “
Contact and Connection Technology
,”
Integrated Device and Connection Technology
,
Prentice–Hall Inc.
,
Englewood Cliffs, NJ
, pp.
439
–
595
.
24.
Yas’ko
,
O. I.
, 1997, “
Problems of Physical Modeling of Electric Arc Discharges
,”
J. Eng. Phys. Thermophys.
1062-0125,
70
(
4
), pp.
639
–
644
.
Crossref
Search ADS
 
25.
Blundell
,
R. E.
, and
Fang
,
M. T. C.
, 1997, “
The Similarity and Scaling of Radiating Arcs Burning in a Turbulent, Axially Accelerating Gas Flow
,”
J. Phys. D
0022-3727,
30
, pp.
628
–
635
.
Crossref
Search ADS
 
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 by American Society of Mechanical Engineers
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