DIN profile – resistance welding
DIN 44 753 defines the times, currents and forces occurring during the working cycle of a weld. The welding control allows the necessary values to be set. Depending on the expansion stage or the type of welding control, partial quantities of the DIN profile can be selected. Simple 4- or 5-time controls do not allow the setting of all parameters defined in the DIN profile. This is usually only possible with complex multifunctional controls. The resistance welding application dictates the complexity of the selectable parameters.
The flow chart can be found in DIN 44 753 or in the technical book Resistance Pressure Welding by Mr. Manfred Krause. Preheating, the possibility of current increase (up slope) and a freely selectable number of pulses have proven to be optimal for almost all applications. The reheat function is often used, especially for steels with a high carbon content. In the field of fine welding of non-ferrous metals with medium frequency, completely new requirements have arisen, which Harms & Wende has taken into account with the development of the Profil IQ control system. With this control for medium-frequency inverters, 7 freely selectable current profiles can be set, each with current increase and decrease as well as pulses.
This even exceeds the already extensive requirements of the DIN profile.