Finite element analysis of crowbarring effect during electromagnetic forming
by Chandrahas Patel; Sachin Dnyandeo Kore
International Journal of Manufacturing Technology and Management (IJMTM), Vol. 31, No. 4, 2017

Abstract: Electromagnetic forming (EMF) is a high velocity metal forming technique suitable for Al material due to increase in formability and high electrical conductivity. EMF makes use of only some percentage of the input current pulse passing through the coil generating magnetic force for workpiece deformation while the rest of the pulses are redundant. The damped sinusoidal current can decrease the life of the capacitor. Cutting short the portion of the current pulse which is not responsible for forming is termed as crowbarring. In the case of crowbarring, the reversal current pulses going in the capacitor bank will be reduced and the life of the capacitor bank can be improved significantly. In this paper, FEM studies are carried out to investigate the current crowbarring effect on the technological electromagnetic forming. FEM results are validated with experimental results available in the literature. It has been observed that more number of input current pulses can lead to increased deformation of sheet. However, after 1.5 input current cycles the displacement remained constant. It means that the current pulses after the second current cycle are not contributing to the deformation of the sheet and can be crowbarred.

Online publication date: Sun, 27-Aug-2017

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Manufacturing Technology and Management (IJMTM):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com