Hydraulic presses are commonly used in processes involving compression and molding, such as forging, stamping, cold extrusion, straightening, bending, flanging, sheet metal stretching, powder metallurgy, and press fits. Occasionally, the hydraulic cylinders of hydraulic presses may experience expansion. What are the possible causes of this expansion?

The hydraulic cylinder itself does not possess particularly strong strength and rigidity. According to the theory of uniform load in material mechanics, the strength and rigidity are distributed in a parabolic state, proportional to the uniform pressure of the working oil pressure, and to the fourth power of the uniform load length. Therefore, the cylinder wall is prone to expansion. It is more likely to occur in slender cylindrical structures, and the expansion location is usually near the midpoint of the sturdy working pressure chamber. Special attention should be paid to calibrating the strength and rigidity of the cylinder during the design process.

The expansion of the hydraulic cylinder in hydraulic presses is a normal wear and tear of the equipment. Don't worry too much; as long as you strengthen the daily maintenance of the four-column hydraulic press and address issues promptly, there won't be too many problems.