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Posted on Jul 31, 2020
Welding or resistance welding is a welding procedure that produces a weld on the friction or wears surface of two chemically similar metals. This welding process is of course different from butt welding, but it can also produce overlap and butt joints.
The seam welding machine gradually forms welding from one end to the other end. In the butt welding machine, the joints can be completely welded at once. The operation of the seam welding machine is somewhat similar to that of the spot welding machine, but all belong to the resistance welding type. They are similar because they both use two electrodes to obtain the required current and pressure. These electrodes are usually disk-shaped and can rotate as the material passes between them. This design allows the electrode to be in continuous contact with the material to produce a consistent and continuous weld. This design also makes the material easy to move. In this article, we will focus on the seam welder, its characteristics, advantages, and applications and also tell you why you might have been underestimating the power of seam welders.
Just like any other type of welding machine, the seam welding machine works with the help of a transformer, which provides the energy needed to weld the joints. The transformer provides low voltage and high current AC power to realize the welding process. The continuous flow of current heats the joint to its melting point. The joint must have a high resistance to ensure perfect seamless welding. Once the joint reaches its melting point, the semi-molten surfaces are then pressed together by welding pressure to form a fusion. This leads to a seam-welded structure characterized by uniformity. The heat generated during the seam welding process can be very large. Therefore, seam welders usually use a water cooling process to cool the electrodes, controller components, and transformers. Considering that welding is carried out under extremely high temperature and applied pressure, the final result of seam welder operation must be very durable. If you do it right, the result will be much stronger than the material that forms the weld. In the past, seam welding has been used to make steel beverage cans. However, currently, seam welding is used to manufacture rectangular or round steel pipes. Another notable feature of the seam welding machine is that its welding rod is driven by a wheel driven by a motor, which is opposite to the driving force of the fixed rod. This mechanism produces non-hermetic seam welding (rolling resistance welding), and it is highly suitable for joining metal plates.
Another notable feature of the seam welding machine is that its welding rod is driven by a motor-driven wheel, which is opposite to the driving force of the fixed rod. This mechanism can be used for non-hermetic seam welding (rolling resistance welding) and is very suitable for joining metal plates.● The Mash or Continuous Motion Seam Welder
Another notable feature of the seam welding machine is that its welding rod is driven by a motor-driven wheel, which has the opposite driving force of the fixed welding rod. This mechanism can be used for unsealed seam welding (rolling resistance welding) and is very suitable for joining metal plates.● Standard Seam Welders
Standard seam welding produces continuous and leak-proof welds. Usually, these final uninterrupted welds can be achieved by carefully rotating the wheel electrodes on the workpiece and using continuous current pulses.● Intermittent Motion or Spot Seam Welder
In this type of welding, when the wheel moves along the workpiece, current pulses are intermittently provided. These intermittent current pulses and the pressure provided by the wheels form individual spot welds, and these spot welds are not sealed joints. Also, this batch method allows the workpiece to automatically move from one welding position to another welding position. This method is particularly suitable for materials made of thicker sheets and resistant to continuous movement methods.
Resistance welding is a form of resistance spot welding. The main difference is that the welding electrode is a wheel driven by a motor instead of a fixed electrode. Ideal for the manufacture of metal plates, this welding method allows current to pass through the metal plates to be connected, and at the same time mechanically fixes the metal plates between the formed copper electrodes in a certain lap shape to connect them. As with other types of resistance welding, since this is the highest resistance point, fusion will occur where the surface of the sheet is in contact, and the heat will be the largest. The heat generated by the disc-shaped electrode wheel performs continuous welding between the workpieces, resulting in rolling resistance welding or unsealed seam welding. Resistance seam welding can either use intermittent motion or continuous motion seam welding and then apply current.
:: Read more : Read this to understand Resistance Spot Welding!
The advantage of the seam welder is that it can form a clear weld without the formation of gas or welding vapors. There is also no need to use filler material for contact. The connecting material can be airtight and liquid impermeable and can be used in a variety of applications. The process can be fully automated, making it a highly repeatable process. Besides, resistance seam welding can produce single seam welding and parallel seam welding at the same time. While resistance seam welding can well form a straight line link, the roller cannot create more complex curved welds. Welding is also not possible at internal corners or where other component features prevent the wheel electrodes from entering. This process is also not suitable for joining metal plates with a thickness of more than three mm. Due to the speed of the rollers, skilled operators may be required to ensure welding quality, and welding machinery is also expensive.
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