April 11, 2006
The Force/Torque Div. of PCB Piezotronics Inc. offers the JM240 ICP® ground-isolated strain sensor that uses piezoelectric sensing elements to indirectly measure dynamic and quasi-static stress forces on resistance welding machinery structures.
The sensor is mounted on a C frame or actuator with a single screw to keep it out of the current flow. Environments with high electrical noise do not affect the ground-isolated design. The sensor may be used to verify that the clamping force has reached a desired minimum value before applying weld current. It also may trigger weld current, which cuts cycle time by applying weld current immediately upon reaching the desired force.
Sensor data can be used to trend electrode tip wear, capture process deviations, and document the process to ensure delivery of zero-defect product components.