Main welding times
The most important parameters in resistance welding are, of course, current, force and time.
After the auxiliary times provide constant boundary conditions, the current-carrying times, i.e. the main times, are now the topic.
The current time is the time in which the welding current flows through the workpieces. In all HWH welding controllers, the welding times are digitally calculated and output. The times are absolutely accurate and reproducible. Depending on the control type, they are entered in periods (20 ms), half-waves (10 ms) or directly in milliseconds.
For an optimal adaptation of the welding current to the specific welding task, a current increase (up slope) at the beginning of the weld or a current decrease (down slope) at the end of the weld can be programmed. The total welding time can be repeated up to 9 times by entering the number of pulses. For some applications, as already described in SZ 2-00, pre- or post-heating times with a corresponding current value make sense and can be programmed in our modern multifunctional controls. Even the very easy-to-use MPS 200 already has the option of a preheating pulse.
Since the materials to be welded are becoming increasingly complex and, unfortunately, their welding properties are also deteriorating, these complex programming options for the welding times are very important. This is the only way to weld modern materials reliably. HWH offers a wide range of variation possibilities with its controls in mains and medium frequency technology. To optimally adapt the welding times to your application.