A hydraulic press is a mechanical device that processes metal, plastic, rubber, wood, powder and other products by using the static pressure of an oil pump to deliver hydraulic oil. It is usually used in pressing processes and press forming processes, such as forging, stamping, cold extrusion, straightening, bending, flanging, sheet stretching, powder metallurgy, press fitting, etc. The principle is that there are many types of machines manufactured using Pascal's law using liquid pressure transmission. Of course, the use also varies according to needs. For example, there are two types of hydraulic presses and hydraulic presses according to the type of liquid that transmits pressure.
What is the reason for the expansion of the four-column hydraulic press? Hydraulic press is an important working part in four-column hydraulic equipment. Under the high-speed and high-pressure operation of the hydraulic system, the pressure working capacity of the hydraulic machine can also increase or decrease, resulting in elastic or elastoplastic deformation and expansion of the cylinder inner diameter. The expansion of the cylinder wall of the hydraulic cylinder causes leakage of the hydraulic system, thereby affecting the normal operation of the four-column hydraulic press. So what causes the expansion of the hydraulic cylinder of a four-column hydraulic machine.
The main reason for the expansion of the cylinder wall of the four-column hydraulic machine is that the strength and rigidity of the four-column hydraulic machine itself are 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 position is usually close to 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.
Not to mention such high-load hydraulic equipment, even some of the daily necessities commonly used in our lives will expand. In other words, this situation belongs to the 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 find that there are not too many problems in time.
