Scaling Relationships for Input Energy in Electromagnetic Welding of Similar and Dissimilar Metals

S V Desai,D P Chakravarthy,J K Chakravartty,P Satyamurthy,Satendra Kumar

doi:10.4236/jemaa.2010.29073

S V Desai, D P Chakravarthy + Show 3 more

Open Access

https://doi.org/10.4236/jemaa.2010.29073

Copy DOI

Abstract

In Electromagnetic Welding (EMW) process, the capacitive energy is the source of input energy. The tool that is used for welding comprises of an electromagnetic coil. The job piece to be welded is placed in close proximity with the coil. The welding is achieved by impact, when the colliding job pieces are accelerated towards each other by the Lorentz force. The electromagnetic and mechanical properties/ parameters of the equipment, tool and the job govern the overall welding process. We have described a procedure to calculate the capacitive input energies for jobs of different sizes. Data is given for welding of strips of aluminium, copper and S.S. in similar and dissimilar combinations. Since the EMW technique is used in limited applications, this type of data is not available. We have validated our model with some data available in the literature. It is hoped that, this information will help the designer, to select and standardize the system and process parameters.

Highlights

Electromagnetic Welding (EMW) is the state of art technology in the field of joining of metals
In Electromagnetic Welding (EMW) process, the capacitive energy is the source of input energy
The welding is achieved by impact, when the colliding job pieces are accelerated towards each other by the Lorentz force

Summary

Introduction

Electromagnetic Welding (EMW) is the state of art technology in the field of joining of metals. It has numerous advantages (suitability for welding of dissimilar metals being the important one among others), which have been reported earlier [1,2] This technique has some inherent limitations, the major being: 1) lower efficiency for large size jobs (exceeding half a meter) and 2) higher energy requirement for the welding of low electrical conductivity metals. We did analysis of electromagnetic Lorentz force based on the parameters of the capacitor bank, the work coil and job piece material. These relationships are useful to arrive at operating and design parameters of the capacitor bank and the coil, which could possibly eliminate the need of building hardware prototypes

Description of the Analytical Approach

Description of the Experimental Work

Discussion of the Results

Conclusions