^{Specification}

The hydraulic cylinder has a simple structure and reliable work, such as bearing the meandering piston rod is not as good as the threaded connection, and the double piston rod hydraulic cylinder can be adopted; The treatment form of hydraulic cylinder is detection and diagnosis methods. Stable movement, reliable sealing of hydraulic cylinders are essential factors for their work. The shape of the movement of the hydraulic cylinder can be considered with differential connections, or some transmission devices can be considered to reduce the journey.

Rolling processing is a kind of non-cutting processing, which uses the plastic deformation of metal at room temperature to flatten the microscopic unevenness of the workpiece surface to achieve the purpose of changing the surface structure, mechanical properties, shape and size. Therefore, this method can achieve both the purpose of photofinishing and strengthening at the same time, which cannot be done by grinding. No matter what kind of processing method is used, there will always be fine uneven knife marks on the surface of the part, staggered peaks and valleys, no cutting technology is safe, convenient, can control accuracy, several advantages:

1. Improve the surface roughness, and the roughness can basically reach about Ra≤0.08μm.

2. Correct the roundness, the ovality can be ≤ 0.01mm.

3. Improve the surface hardness, eliminate the force deformation, increase the hardness of HV≥4°
4. There is a residual stress layer after processing, and the fatigue strength is increased by 30%.
5. Improve the quality of the fit, reduce wear, and extend the service life of the parts, but the processing cost of the parts is reduced.

^Production