Analysis and comparative study of factors affecting quality in the hemming of 6016T4AA performed by means of electromagnetic forming and process characterization

Electromagnetic forming—A review

“…It is shown that for this part the same hemmed union geometry is achieved for all areas using one single coil and one single discharge. A detailed study of electromagnetic hemming applying experimental as well as numerical methods is presented in Jimbert et al (2011).…”

Electromagnetic Hemming of Aluminum Sheets using FEM

“…Some important defects which occurs while hemming operations takes place are wrinkles or splits over the flange, overlap of the material in the corners or roll in [2]. To significantly reduce the number of "trial and error" loops during production, it is important to use simulation tools to better understand the hemming process.…”

“…Other researchers [3] have annealing the deformed area after the bending operation to reduce the hemming union radius. But integrating the heating step in continuous production line is a difficult and complex process [2]. The EMH (Electro Magnetic Hemming) is carried out using capacitor bank which is connected in series with resistance and inductor as shown in Fig.…”

“…8 (b). For a proper hemming process, it is important that hemming radius remains least affected [2]. It has been found that sheet deflection keeps increasing with increase in hemming union radius due to increasing in of the standoff distance.…”

Effect of System Parameters on Electromagnetic Forming

“…Seo et al 13 studied the electromagnetically assisted stamping, concluded that friction between blank and drawing beads can be enhanced by introducing blank restrainer in deep drawing. Jimbert et al 14 studied electromagnetic hemming of 6016T4AA sheet, founded that electromagnetic forming technique can distribute deformation along the bigger area due to higher strain velocity, so reduce the risk of crack.…”