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Test set for measuring of electrode forces

The test set can be used to check electrode force in spot-welding equipment. The test set consists of a force transducer and a display unit. To check the forces acting between the electrodes, the force transducer is held between the electrodes. The concave force transfer surfaces centre the force transducer. When the welding electrodes come together, the magnitude of the applied force can be read off on the display unit.
The force transducer is of shear force construction and therefore insensitive to transverse forces and torques. It has a measuring range of 0…10 kN. The output signal is connected to the handheld display unit via a cable. This display unit carries the voltage supply for the transducer. Alternatively, the supply can be taken from a PLC.

The proven tecsis thin-film sensors are implanted in this type of force transducer too. The sensor, which is welded in via laser, has all advantages of the conventional bonded foil strain gauges, but without having their substantial disadvantages (temperature drifts of the glue and creeping).