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What are the advantages of projection welder over spot welder? [PW03]
Dec 23,2023
At present, the nut projection welding technology is getting mature with the strong market demand. The market share of the projection welding machine has gradually exceeded the spot welding machine.
The projection welding machine has a variety of power supply configurations, mainly AC projection welding, medium frequency inverter projection welding, energy storage projection welding for option.
Compared to spot welding, projection welding has the following 5 advantages:
1.Multiple solder joints can be welded simultaneously in one welding cycle. Not only the productivity is high, but also there is no current diversion effect. Therefore, multiple solder joints can be arranged on a narrow part without being limited by the point distance. The projection welding machine is simple to operate, saving time and labour.
2.In projection welding, the current density is set at the projection point, the current density is large, so a smaller current can be used for welding, and a smaller nugget can be formed reliably. In spot welding, corresponding to a certain plate thickness, it is difficult to form a nugget less than a certain size. In projection welding operation, the current control is relatively simple. The current value is highly controllable. The short cut caused by the current will not lead to equipment failure.
3.Accurate projection position, consistent size, and uniform strength of each solder joint enables the size of the projection welding joint can be smaller than that of spot welding for a given strength. However, when we weld the workpiece with a relatively large area, it is recommended to use the spot welding machine. Because the projection welding machine is suitable for welding more precise workpiece.
4.Due to the use of a large flat electrode and the projection points all set on one workpiece, the projection welder can minimize the indentation on the exposed surface of another workpiece to the greatest extent.
5.Oil, rust, oxide, plating and other coatings on the surface of the workpiece have less influence on the projection welding, compared with spot welding. Certainly, the clean surface can help obtain more stable weld quality.
Spot welding has relatively high requirements on the weld environment. The surface of the workpiece must be cleaned. Dirty workpiece surface often affects the surface effect of spot welding.
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Wuxi HAIFEI Intelligent Equipment Co., Ltd.
Wuxi HAIFEI Welding Equipment Co., Ltd.
Add: 28 Shuiyun Road, Yuecheng, Jiangyin, Jiangsu Province, China. (Postal Code: 214404)
Mobile: +86 18915302352
Email: wushijie@jshaifei.com