Abstract: A welding system having a welding gun, comprising a casing that is grounded through a ground conductor, and a monitoring device, which detects the resistance of the ground conductor. A blanking device deactivates the monitoring device during the welding operation to reduce the danger of shut-downs through the ground integrity monitor. It is proposed to either deactivate the measuring circuit of the ground integrity monitor or to switch off the welding power interruption associated therewith as long as a welding current may flow or is flowing through the ground conductor. The monitoring device is deactivated or blanked out only for an essentially negligible fraction of the entire time, and there is no danger of any impairment of safety due to this short-term deactivation.

Abstract: A welding system having a welding gun, comprising a casing that is grounded through a ground conductor, and a monitoring device, which detects the resistance of the ground conductor. A blanking device deactivates the monitoring device during the welding operation to reduce the danger of shut-downs through the ground integrity monitor. It is proposed to either deactivate the measuring circuit of the ground integrity monitor or to switch off the welding power interruption associated therewith as long as a welding current may flow or is flowing through the ground conductor. The monitoring device is deactivated or blanked out only for an essentially negligible fraction of the entire time, and there is no danger of any impairment of safety due to this short-term deactivation.

Abstract: A welding gun has two projecting electrode arms that are interconnected and able to move relative to each other and whose free ends each hold one welding electrode. The welding gun also has an electrode drive that moves the electrode arms from a closed position, in which the welding electrodes are located close together, to an open position. The welding gun projecting electrode arms have a movement sequence that optimizes welding precision. The electrode arms are attached to a linear guide so that they are able to be displaced linearily relative to each other.

Abstract: Apparatus for resistance welding with different welding currents has a welding transformer having a primary and a secondary side. Two welding electrodes are connected at the secondary side to the welding transformer and are each arranged on a respective control arm, one of the arms being movable by an actuating drive. A control and regulating arrangement is connected on the primary side between the welding transformer and a connection to a three-phase network. The control and regulating arrangement has a rectifier circuit connected to all three phases of the network and a controllable welding inverter for converting the rectified voltage into voltage pulses of alternating polarity at a predetermined frequency. At least one electronic component of the rectifier circuit and/or the welding inverter is connected to the drive for moving one of the control arms, for controlling and/or powering the drive.

Abstract: Apparatus for resistance welding with different welding currents has a welding transformer having a primary and a secondary side. Two welding electrodes are connected at the secondary side to the welding transformer and are each arranged on a respective control arm, one of the arms being movable by an actuating drive. A control and regulating arrangement is connected on the primary side between the welding transformer and a connection to a three-phase network. The control and regulating arrangement has a rectifier circuit connected to all three phases of the network and a controllable welding inverter for converting the rectified voltage into voltage pulses of alternating polarity at a predetermined frequency. At least one electronic component of the rectifier circuit and/or the welding inverter is connected to the drive for moving one of the control arms, for controlling and/or powering the drive.

Abstract: A resistance welding device having a welding current source, a control and/or regulating device for regulating the welding current, and at least one set of interchangeable welding guns on which welding electrodes are mounted in such fashion that they can be pressed toward one another to hold sheets to be welded between them. The interchangeable welding guns contain a local data storage memory located on the welding guns for storing data specific to the operation of the welding guns, and a data interface which can interact with a second data interface located on the control and/or regulating device. When the set of welding guns in attached to the welding device, the two data interfaces are connected thereby permitting the specific operating data for the welding guns to be transmitted to the program memory of control and/or regulating device.