The strength and stiffness of the cylinder of the four-column hydraulic press itself are not strong. According to the uniformly distributed load theory of material mechanics, the strength and stiffness are distributed in a parabola, which is directly proportional to the uniformly distributed pressure of working oil pressure and to the fourth square of the uniformly distributed load length. Therefore, the expansion of the cylinder wall is easy to occur in the thin and long cylinder, and the expansion position is often close to the mid-point of the high-pressure cavity. In the design, attention should be paid to check the strength and stiffness of the cylinder of the four-column hydraulic press.
Abnormal high pressure, high load or high speed piston inertia force occurs in the working process of the four-column hydraulic press. When the instantaneous time suddenly stops, the pressure value in the working chamber immediately increases, even several times higher than the high working pressure, so that the cylinder diameter expands.
The cylinder of the four-column hydraulic press is often overloaded. A sudden stop followed by a restart will more than double the instantaneous oil pressure and easily cause the cylinder hole to expand.
The buffer device of the four-column hydraulic press does not work at all and is in full open state, so that the piston in operation cannot slow down. If it suddenly hits the cylinder head, it may bounce back, causing instantaneous overpressure in the working chamber.
The cylinder material is not good or the cylinder structure design is not reasonable. If low strength steel is misused, the stability coefficient will be reduced. Cylinder diameter will inevitably expand if cylinders are used for a long time.
Rui 'an Tianrui Hydraulic Machinery Co., Ltd. specializes in the production of four-column hydraulic press, more related products please pay attention to the official website www.ratryyjx.com
Abnormal high pressure, high load or high speed piston inertia force occurs in the working process of the four-column hydraulic press. When the instantaneous time suddenly stops, the pressure value in the working chamber immediately increases, even several times higher than the high working pressure, so that the cylinder diameter expands.
The cylinder of the four-column hydraulic press is often overloaded. A sudden stop followed by a restart will more than double the instantaneous oil pressure and easily cause the cylinder hole to expand.
The buffer device of the four-column hydraulic press does not work at all and is in full open state, so that the piston in operation cannot slow down. If it suddenly hits the cylinder head, it may bounce back, causing instantaneous overpressure in the working chamber.
The cylinder material is not good or the cylinder structure design is not reasonable. If low strength steel is misused, the stability coefficient will be reduced. Cylinder diameter will inevitably expand if cylinders are used for a long time.
Rui 'an Tianrui Hydraulic Machinery Co., Ltd. specializes in the production of four-column hydraulic press, more related products please pay attention to the official website www.ratryyjx.com