Welding is the backbone of modern construction, automotive repair, and metal fabrication. At the heart of every welding job is the welding machine, a tool designed to generate the heat and power needed to permanently join metals. But how exactly does a welding machine work?
How a Welding Machine Works
A welding machine converts electrical energy into heat. This heat melts the edges of metal pieces, allowing them to fuse when the molten area cools. The machine’s power source—either alternating current (AC) or direct current (DC)—drives an electric arc between the electrode and the workpiece. The intense arc temperature, often exceeding 6,000 °C (10,800 °F), is what creates a strong, lasting joint.
Common Types of Welding Machines
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Arc (Stick) Welders: Affordable and versatile for general repair work.
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MIG Welders: Use a continuously fed wire for clean, fast welding, ideal for automotive and production lines.
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TIG Welders: Provide precise, high-quality welds on stainless steel or thin metals.
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Spot Welders: Specialised for sheet-metal work such as car body manufacturing.
Applications
From building skyscrapers to repairing pipelines and crafting metal art, welding machines are essential wherever strong metal joins are required.
Conclusion
Understanding how welding machines function helps you select the right model for your projects—ensuring stronger welds, better safety, and long-term value.
