How to weld the hydraulic high pressure cylinder of excavator?

The materials of high-pressure cylinders are different. The high-pressure cylinder of excavator is mostly made of 45#, 15MnVn, 27SiMn, 30CrMo and 38CrMoAlA. According to different materials, the welding process is different. Cast iron cylinder is not suitable for excavators with high pressure and large bending moment.

According to the processing technology, welding after welding is not recommended for the cylinder, because the inside has been processed and formed, and welding will lead to deformation and affect the working performance.

If it is the end of the oil cylinder, it can be welded, but it is not recommended to control deformation. Methods: First, grind the welding groove with a grinder, and then thoroughly remove the oil and impurities in the gap before welding.

However, the most important thing is to determine the materials first.