Forming of a Bimetallic Element for the Resistance Element Soldering Method

Abstract

The joining of sheet metal parts produced in the material combination of Fe-Fe, Fe-Al as well as Fe-thermoplastic and Al-thermoplastic can be realized by the Resistance Element Soldering (RES). Extruded bimetallic elements were used to form the overlap joint. The semi-finished product for extrusions was a Cu 99.9 tube with dimensions φ6 × 0.5 mm and length 9 mm, filled with Sn60Pb40 solder. “T” shaped overprints were produced in two ways. Simulation in the ANSYS software environment was chosen to optimize, select the appropriate forming process, and design the geometry of the functional parts of the forming tool, allowing to use only one extrusion forming operation. The results of the simulations are the magnitudes of stresses and strains, and different head shape geometries of the bimetallic element extrusions of the three proposed forming methods. The task was to achieve extrusions without defects of the Cu tube shell, such as corrugations and wrinkles. The geometry was observed and compared by macroanalysis of extrusion sections made on a laboratory forming tool.

Use of Sn60Pb40 Solder in Resistance Element Soldering Technology

“…The test was carried out on an Instron 1195 universal testing machine at a crosshead speed of 5 mm•min −1 . The method of manufacturing bimetallic semi-finished products and finished elements is described in more detail in articles [26,27]. Unlike the results presented in paper [20], elements with modified geometry and dimensions were used to ensure better mechanical properties for RES joints.…”