{"id":19779,"date":"2025-12-17T14:18:17","date_gmt":"2025-12-17T13:18:17","guid":{"rendered":"https:\/\/www.darda.de\/?page_id=19779"},"modified":"2025-12-17T14:18:17","modified_gmt":"2025-12-17T13:18:17","slug":"welding-machine","status":"publish","type":"page","link":"https:\/\/www.darda.de\/en\/knowledge\/welding-machine","title":{"rendered":"Welding machine"},"content":{"rendered":"
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A welding machine is a central working tool in metal construction, deconstruction, and repair. Whether for temporary auxiliary structures, adapter plates for attachments, or repairs to steel components\u2014the thermal joining of metals complements mechanical methods such as concrete demolition shear, hydraulic splitter (wedge) for stone and concrete, or steel shear. In many application areas of Darda GmbH, such as concrete demolition and special deconstruction<\/a>, in building gutting and cutting, as well as in rock excavation and tunnel construction, the interaction of hot work<\/em> and cold separation and splitting methods<\/em> is crucial for safety, quality, and efficiency.<\/p>\n

Definition: What is meant by welding machine<\/h2>\n

A welding machine is a power source with control and feed equipment that provides the arc for the thermal joining of metallic materials. It converts mains or generator power into a welding current suitable for the respective process and controls parameters such as current, voltage, and arc characteristics. Depending on the process, the welding machine includes an electrode holder or torch, potentially a wire feeder and shielding gas supply. The goal is to produce a permanent, integral joint with defined weld bead geometry and strength.<\/p>\n

Design and operation of a welding machine<\/h2>\n

Modern units typically operate as inverters: they rectify and switch the electrical energy at high frequency to achieve a stable arc, low losses, and compact designs. Key assemblies include rectifier, power electronics, control unit, cooling, (for MIG\/MAG) wire feeder, and the connections for the ground cable and torch.<\/p>\n

Duty cycle and performance reserves<\/h3>\n

The duty cycle<\/strong> (DC) indicates how long a welding machine can operate at a given current within ten minutes (e.g., 60% DC at 200 A). On the construction site, reserves are important because ambient temperature, cable length, and generator set operation influence usable performance.<\/p>\n

Power supply on the construction site<\/h3>\n

Welding machines are supplied via 230 V or 400 V. When operating from a generator set, adequate apparent power, voltage stability, and protective measures must be ensured. Parallel operation of other loads\u2014such as a hydraulic power pack<\/a>\u2014should be coordinated to avoid voltage dips. Long extensions increase voltage drop; large cross-section cables and short runs are advantageous.<\/p>\n

Welding processes in deconstruction, steel and plant construction<\/h2>\n

Different processes are used depending on the task. Selection criteria include material, plate thickness, accessibility, quality requirements, and weather.<\/p>\n