Monitoring during resistance welding

Every production process must be checked for compliance with the process parameters or for the result to be achieved. The customers’ justified demands for quality require ever more far-reaching measures to safeguard production. This applies both to the manufacture of our products and to the welded joints that you or your customers produce with the help of our welding systems. In addition to the obligatory final inspection by means of random destructive testing, parameter or process monitoring can help to ensure quality. Depending on the significance or acceptance of the monitoring, the amount of destructive testing as a final inspection can be reduced and thus costs saved.

This is the goal of any online surveillance. With our welding controllers or systems, we offer our customers several levels of parameter or process monitoring. It starts with simple current monitoring, which is sufficient and meaningful for many processes. Many control series can be optionally expanded with an integrated current monitoring function (inspectors) if not already on board as standard.

In addition to pure setpoint monitoring, envelope monitoring is the next step in the quality chain. A further step is real process monitoring, either via quality inspectors or with the PQS system. Not only the pure parameters current and voltage are monitored, but also the process images of the actual weld achieved through information compression. It allows online or real-time evaluation of the weld. This means that the necessary production control through subsequent destructive testing can be reduced to a minimum.