Double-action Press Machines Hydraulic are commonly used in pressing processes and press forming processes such as forging, stamping, cold extrusion, straightening, bending, flanging, sheet drawing, powder metallurgy, press fitting, etc. Sometimes the hydraulic cylinder of the hydraulic press will expand, so what are the reasons for the expansion?
The strength and stiffness of the hydraulic cylinder itself is not particularly strong. According to the uniform load theory of material mechanics, the strength and stiffness are distributed in a parabolic state, which is proportional to the uniform pressure of the working oil pressure and proportional to the fourth power of the uniform load length. Therefore, the cylinder wall easily expands. It tends to occur in elongated cylinders, and the expansion location is usually near the midpoint of a solid working pressure chamber. During the design process, special attention should be paid to the strength and rigidity of the calibration cylinder.
The expansion of the hydraulic cylinder of the hydraulic press belongs to the normal wear and tear of the equipment. Don't worry too much. As long as the daily maintenance of the four-column hydraulic press is strengthened and problems are found and dealt with in time, there will not be too many problems in time.
