All resistance welding processes show a high productivity and can be automatized quite easily. The first three of the above mentioned processes are mainly being used for sheet metal constructions in the range of 0,5...3,0 mm. A famous example for the application is the automotive industry. In each car you will find 5000 spot- and projection welds.
The heat necessary to make the weld is being produced as so called electro-heat, following Joule's law. During welding the material usually is melting in the interface, grows to a molten nugget which solidifies after switching off the current and so forms the joint.
The main parameters are electrode force, weld time and weld current.
At first sight, all this seems to be quite easy and in fact it is not too complicated, if you know a lot more... For a succesful and safe production many interfering influences have to be taken in account.
In our Labs you will find more than 40 resistance welding machines of different style, size and power. This machinery is being operated by 4 persons (2 engineers, 2 technicians). stationary spot welding equipment up to 100 kA and 20 kN welding guns up to 20 kA and 7 kN manual and robot-guns pneumatic, servo-pneumatic and servo-electric guns special equipment for "small scale" resistance welding projection welding equipment up to 215 kA and 40 kN seam welding equipment AC- and DC-machines medium frequency equipment (MF/Inverter) weld timers of different brands adaptive weld controls and weld monitors equipment for electrode life check special unit for measurement of contact resistances specialized mechanical testing equipment
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Resistance Welding
