Soudronic Ag

Daniel Dietrich

Willi Mueller

In the field of manufacturing container bodies by means of resistance seam welding machines, at least a disturbance variable is collected, particularly errors in cutting the metal sheet. Because of this collection of disturbance variables, at least a control variable is automatically changed in order to compensate or to diminish the influence of the disturbance variable on the welding seam quality.

Method for manufacturing container bodies from metal sheet

Method and device for manufacturing container bodies from metal sheet

In order to evaluate the welding current for the resistance seam welding of an overlap seam of container bodies, a welding with changing welding current intensity is carried out for a container body of the production series, resulting in a changing welding of the seam, ranging from the welding with a too high temperature to the welding with a too low temperature. The electric energy for this welding is determined several times during this welding and/or the temperature of the weld seam is determined several times and the welding current intensity is determined at which the welding of the individual container body is too cold and the welding current intensity at which the welding is too hot. This determination is based on the determined electric energy values and/or on the determined temperature values and based on this determination a preferred range for the welding current intensity within these limits of too hot and too cold is determined. By this, an evaluation if the welding current intensity is correct may take place in a simple way during the production. After the welding of the individual container bodies a changed welding current intensity lying between the welding current intensity of the too hot and of the too cold welding may optionally be set and used for the following series of container bodies of the production series.

Growing community of inventors

Hittnau, Switzerland

Daniel Dietrich