500mm construction hydraulic butt fusion machine can butt many metal materials, such as copper bar, aluminum bar, titanium bar, steel bar, copper tube, aluminum tube, copper tube, aluminum tube, flat iron flange, steel bar, iron ring, copper ring, aluminum ring, etc. Because a large number of them are used for welding copper aluminum tubes, the factory is called copper aluminum tube welding machine. Before using this butt welding machine, the workpiece usually needs to do the following work:

1. Pay attention to the end face geometry

During butt welding, the geometric shape and size of the butt joint surface of two workpieces shall be basically consistent at least 2mm. Otherwise, it will be difficult to achieve heat balance, and the heating and plastic deformation of the two workpieces cannot be guaranteed to be consistent, which will affect the joint quality. In production, the difference between the diameters of round workpieces shall not exceed 15%, and that of square workpieces and tubular workpieces shall not exceed 10%.

2. Precautions for dissimilar metal welding

When welding different metals, the metal with good thermal conductivity should extend out of the clamp for a long time, so that the current can pass through the longer metal and increase heat generation, so as to achieve heat balance. The metal with lower melting point should also extend longer because of its fast burning loss. The copper pipe mouth of the copper aluminum pipe shall be shrunk to keep fit with the aluminum pipe

3. Clean the mating port face

Clean the oxide at the workpiece port, such as rust stains. It has poor conductivity and thermal conductivity, which affects the current flow, and the interface quality will become worse.

500mm construction hydraulic butt fusion machine https://www.dowelding.com/Butt-Fusion-Machines