With the progress and development of science and technology in recent decades and the improvement of people’s living standards, the demand for metal pressing and stretching products is increasing. Hydraulic presses have become one of the indispensable equipment in industrial production. Now domestic hydraulic presses The development of the industry mainly relies on manufacturing, which is relatively backward in terms of technology.
Analysis of Hydraulic Press malfunction or malfunction:
- (1) The valve core is stuck or the valve hole is blocked. At this time, check the contamination of the oil; check whether dirt or colloidal deposits are stuck in the valve core or block the valve hole; check the wear of the valve body.
- (2) The piston rod and the cylinder are stuck or the hydraulic cylinder is blocked. The throttling resistance in the control pipeline may be too large, the flow valve is improperly adjusted, the control pressure is inappropriate, and the pressure source is disturbed. If so, hydraulic oil should be added, seals and pipe joints should be treated, and the coarse filter element should be cleaned or replaced. In the case of low temperature, the hydraulic oil has high viscosity and poor fluidity, which causes the hydraulic cylinder to move slowly. At this time, check the liquid level of the hydraulic oil tank, the seals and pipe joints on the suction side of the hydraulic pump, and whether the oil suction strainer is too dirty. Mainly because there are leaks in the system. At this time, no matter how you manipulate it, the hydraulic cylinder does not move or moves slightly.
- (3) Air enters the hydraulic system. At this time, check whether the piston and piston rod seals are too tight, whether dirt and colloidal deposits have entered: whether the axis line of the piston rod and the cylinder barrel is aligned, and whether the wearing parts and seals are invalid.
- (4) The initial movement of the hydraulic cylinder is slow. When the flow valve or directional valve spool is stuck or the valve hole is blocked, the hydraulic cylinder is prone to malfunction or malfunction. At this time, check the control pressure source to ensure that the pressure is adjusted to the specified value of the system. The improvement method is to replace the hydraulic oil with better viscosity and temperature performance. At low temperatures, it can be heated by a heater or the machine itself to increase the oil temperature at startup.
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