差 間 ERW と SAW

1. 異なる 原則
抵抗 溶接 使用 原理 の 抵抗 加熱 に 適用 a certain pressure on the surface of the the workpiece to generate current between the contact surfaces and convert the electrical energy into heat energy, causing the corresponding area of the the workpiece to heat up and melt. under the turbulence and infiltration of the the molten pool, metal welding is achieved. a method.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Different scope of application
以来 抵抗 溶接 使用 抵抗 に 生成する 熱 から 電気 電流 に 達成 溶接, it is suitable for workpieces with small diameter, few welding points, small area, and simple shape; in addition, the temperature of the center part and the nearby area of this method are too high, and the temperature in the welding for workpieces with large diameters and relatively large wall thicknesses, since the ends are subject to greater thermal influence, they are prone to deformation, stress concentration, etc., which affects the dimensional accuracy of the workpiece.
addition to the advantages of resistance welding, submerged arc welding can also weld workpieces with large diameters and relatively large wall thicknesses. since the filling material can be controlled at the required location, the compound composition and atmosphere of the molten pool can also be better controlled. Greatly improves welding quality and stability.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Different welding quality(英語)
抵抗 溶接 使用 圧力 に 原因 対応する 面積 の ワークピース に 熱 アップ と メルト, と 圧力 と 熱 生成 で 同じ 時間. しかし 溶接 品質 の これ 溶接 方法 です 保証, the welding speed is too fast, which 時々 leads to oxidation, deformation, cracks and other problems。
The welding quality of submerged arc welding is better, and the filling material can be controlled at the required position, so the compound composition and atmosphere of the molten pool can also be better controlled, and the weld quality is more stable.