| For over 70 years, August Strecker GmbH has been specialising in the manufacture of electric buttwelding machines for non-ferrous wires and cables, strands or stranded conductors, as well as buttwelders for steel wires, steel cord or strands and steel ropes. Apart from this wide range of machinery that is available "off the shelf", the company also manufactures welding machines in special design to meet particular requirements of individual customers. Strecker�s portfolio includes:
- Buttwelding machines for all kinds of wires, sizing from 0.04 up to 32mm � for steel and up to 34mm � for solid non-ferrous wires, including welders with automatic deburring cycle. Various annealing devices are available for steel wires;
- Buttwelders for standard conductors sizing from 0.08 up to 2,000mm2. Welding by means of tubes or without any tube (with automatic deburring);
- Cold pressure buttwelders with automatic deburring cycles;
- Wide specialised range for the most varied applications and special purpose machines.
For joining ribbed constructional steel, August Strecker offers buttwelders in special design that join the ends of hanging wire coils in the vertical plane. This particular design avoids to straighten the material prior to welding. The machines feature hydraulically operated clamping devices. The welding cycle is initiated hydraulically, while the upsetting pressure is generated by an upset pressure spring. Different machine executions can be set-up, such as stationary welders as well as movable machines. Depending on the material's quality, the machine can also be equipped with different annealing devices suitable for even the most difficult steel grades.
Furthermore, as a result of recent developments, the company now offers buttwelding by medium frequency. Working at 1,000Hz, 3-phase current, the system does not need any single phase load of the main supply. This means that the absorbed amperage during a welding cycle is substantially reduced (approximately divided by two) and the fuse protection is considerably facilitated, especially for bigger buttwelding machines having a capacity of 100kVA or more. For example, if considering a buttwelding machine having a nominal capacity of 220kVA and being used for joining a stranded copper conductor of 400mm2, a standard machine will require approximately 2,000A for a period of time of 12 seconds, while, by using the medium-frequency buttwelding, the machine will only require 1,100A for a period of time of 15 seconds. Medium-frequency technology is not limited to new machines only, it is also possible to modify existing machines.
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