Pressure problems and solutions of four-column deep drawing hydraulic press
What effect will the four-column deep drawing hydraulic press have when the pressure is too high?
The system pressure of the four-column deep drawing hydraulic press is designed to be higher than the actual pressure, which not only increases the service life of the equipment, but also protects the hydraulic components from damage. Many people don’t understand that it is easy to cause pressure overload of the four-column deep drawing hydraulic press when operating the equipment. As a hydraulic press manufacturer, today I will introduce the impact of downforce overload on the four-column deep drawing hydraulic press and how to solve it? Usually, the normal pressure of a four-column deep drawing hydraulic press is 25MPa. In the normal production process, the pressure of the hydraulic press shall not exceed 25MPa. Take the 315 three-beam and four-column deep drawing hydraulic press that we have used for a long time as an example. The working temperature is usually in the range of 30-80 degrees. The oil temperature in the hydraulic system of the four-column deep drawing hydraulic press must be controlled within the range of 30-60 degrees. If the oil temperature exceeds this range, it will have a lot of adverse effects on the hydraulic system.
When the working pressure of the four-column deep drawing hydraulic press is greater than 25MPa, we can control the working pressure of the four-column deep drawing hydraulic press through the electric contact pressure gauge on the hydraulic system or the system pressure regulating valve. The pressure overload of the four-column deep drawing hydraulic press will cause the equipment pressure to rise rapidly, which will cause the hydraulic pump and the motor to work overload and affect its service life. The corresponding hydraulic cylinder will also be overloaded, affecting the service life of the hydraulic cylinder. If the quality of the hydraulic pipeline is not good, it will also cause the tubing to burst, leak oil, cause some failures, and damage the equipment. The pressure overload of the four-column deep drawing hydraulic press not only affects the performance of the equipment, but also causes certain accidents. Many large manufacturers will consider the corresponding problems at the beginning of the design and install the corresponding unloading valve. When the pressure suddenly rises, the high-pressure hydraulic oil returns to the tank through the unloading valve or shutdown protection device.
Because the pressure overload of the four-column deep drawing hydraulic press is harmless and huge, many experienced designers have taken this into consideration. An unloading valve will be installed in the hydraulic system design. Therefore, when purchasing a four-column deep drawing hydraulic press, not only the price of the equipment, but also the technical strength of the manufacturer. Especially for the four-column deep drawing hydraulic press purchased by a small company, not only the quality cannot be guaranteed, but the hydraulic system cannot be guaranteed, let alone the influence of pressure overload.
Operation matters to be paid attention to during pressure test of four-column deep drawing hydraulic press
The four-column deep drawing hydraulic press uses a special hydraulic oil as the working medium and a hydraulic pump as the power source. The hydraulic oil enters the cylinder/piston through the hydraulic pipeline by the force of the pump, and then several cylinders/pistons cooperate with each other. The seals are different in different positions, but they all play a sealing role to prevent hydraulic oil from leaking. Converting hydraulic energy into mechanical energy Hydraulic transmission is a transmission method that uses hydraulic pressure to transmit power and control. The hydraulic device is composed of hydraulic pump, hydraulic cylinder, hydraulic control valve and hydraulic auxiliary components. So what should we pay attention to when measuring pressure?
The matters needing attention during the pressure test of the four-column deep drawing hydraulic press:
1. First, understand the principle of the machine and the corresponding structural performance, and carry out the withstand voltage test in accordance with the instructions for use.
2. During pressure test, the system valve should be adjusted to the selected test pressure value.
3. After turning on the power, start the motor and observe whether the direction of rotation is correct.
4. Pay special attention to the temperature change of hydraulic oil during debugging. The suitable temperature of the general hydraulic system is 40-50℃. When working at this temperature, the efficiency of hydraulic components is high, and the oil’s oxidation resistance is in a state. If the working temperature exceeds 80°C, the oil will deteriorate prematurely (for every 10°C increase, the deterioration rate of the oil will increase by 2 times), it will also cause the viscosity to decrease, the lubrication performance deteriorates, the oil film is easy to break, and the hydraulic parts are easy to burn. Therefore, the working temperature of hydraulic oil should not exceed 70～80℃. When it exceeds this temperature, stop cooling or take forced cooling measures.
The working pressure, pressing speed, and stroke range of the four-column deep drawing hydraulic press series can be adjusted according to work needs, and various tonnages, models and process actions can be customized according to the needs of users. The programmable controller can be used to achieve adjustment and Production of semi-automatic operation method.