Method for Monitoring and Controlling a Quality of Spot Welds

摘要

The disclosure concerns a method for monitoring and/or controlling a quality of spot weldings of a processing island, comprising at least two welding controls on one or more workpieces, wherein the method is based on a comparing of the measured values and an outputting of a fault message taking place from a central control of the processing island, the central control being in communicating connection with every welding control, in order to control them appropriately in dependence on all of the measured values and the predefined tolerance margin, the welding controls being in communicating connection with one another.

主权项

1. A method for at least one of monitoring and controlling a quality of spot weldings of a processing island having at least two welding controls on at least one workpiece, the method comprising:
measuring measured values one of during and after an execution of resistance spot weldings at different locations on a workpiece, the measured values representing at least one of a voltage, a current, a resistance, a welding time, an energy, a force on welding contacts, and a power during a production of a resistance spot welding; storing the measured values; monitoring the measured values; comparing the measured values with a reference measurement value, the reference measurement value representing at least one of a corresponding voltage, a current, a resistance, a welding time, an energy, a force on welding contacts, and a power during the production of a corresponding resistance spot welding; and outputting a fault message when a predetermined number of successive measured values lie at least one of outside a predefined tolerance margin from the reference measurement value and outside a tolerance zone, wherein the comparing of the measured values and the outputting of the fault message are performed by a central control of the processing island, wherein the central control is in communication with each of the at least two welding controls to control the at least two welding controls in response to the measured values and the predefined tolerance margin, and wherein the at least two welding controls are in communication with one another.