Hydraulic cylinders are an integral part of modern industrial equipment All work of this movement of bulky equipment such as earthmoving and road vehicles, should be implemented with a high degree of accuracy and dynamics, especially in e-governance. Working motion hydraulic excavator carried out by means of hydraulic cylinders. Arrow up of two hydraulic cylinders. Handle and shovel move a hydraulic cylinder. Depending on the size of the machine design pressure in the hydraulic cylinders up to 160 320 bar. During operation, when static loads are added to the dynamic load (sudden changes in direction traffic load during loading and unloading of the bucket and other), individual pressure peaks can be several times higher than the calculated values.

In these circumstances, hydraulic cylinder design work, and especially the quality of its production is very important. Welds head and cylinder base with a cylindrical housing demand from the applied welding process is very high quality and reliable welding. In most cases, the annular sutures are in the section of U – shaped profile. Centering surface, made boring, so that the exact form of landing and serve as substrates root welds. Because housing is machined (with a tolerance H8), providing direction of movement of the piston, then the root joint requires a minimum of penetration (depending on the design – 1.5 3 mm). During welding, the spigot has melted, leaving a clean surface treated boring. For welding use various methods to ensure the implementation of the above requirements with high performance.