Causes of Slow Movement in the Hydraulic Cylinder of a 630-Ton Hydraulic Press
1.Uneven Frictional Force in the Guiding Components: The low-speed creeping caused by uneven frictional forces in the hydraulic cylinder's guiding components. It is recommended to prioritize the use of metal as guiding support. If non-metallic support rings are used, choose those with good dimensional stability in the hydraulic fluid, especially with a low coefficient of thermal expansion. Additionally, control the dimensional tolerances and thickness uniformity of the support rings strictly.
2.Impact of Component Machining Precision: The issue of precision in part machining can affect the 630-ton hydraulic press's hydraulic cylinder. It is essential to strictly control the machining precision of the inner wall of the cylinder body and the surface of the piston rod, especially geometric precision, where linearity is critical.
3.Slow Movement due to Air Entrapment: The low-speed creeping caused by the presence of air in the hydraulic cylinder. This situation can be addressed by repeatedly running the hydraulic cylinder to achieve air removal. If necessary, install air venting devices in the hydraulic cylinder's chambers or pipelines during the operation of the hydraulic system in the four-column hydraulic press.
4.Improper Design Clearances in the Hydraulic Cylinder: Low-speed creeping caused by improper clearances in the design of the 630-ton hydraulic press's hydraulic cylinder. It is essential to correctly design the sliding fits between the piston and the cylinder body, as well as the piston rod and the guide bushing.
5.Seal Material Issues: Low-speed creeping in the hydraulic cylinder of the four-column hydraulic press caused by seal material problems. It is recommended, under allowable conditions, to prioritize the use of combination seals with polytetrafluoroethylene (PTFE) as the sealing material.