The operation of stretching hydraulic press

When the stretching hydraulic machine starts the hydraulic valve, it first outputs the solenoid valve control signal, and then outputs the system pressure and flow control signal. When the hydraulic valve is closed, the system pressure control signal is first cleared, and then the hydraulic valve control signal is closed, so as to ensure that the hydraulic valve is opened and closed. The system environment is low pressure or no pressure, which can effectively reduce hydraulic shock. The delay link added in this process is usually 0.1 second (100 milliseconds). Since the response time of the hydraulic system is usually ten milliseconds, etc., the effective and sensitive use of the pressure and flow signal output slope will greatly improve the stability of the hydraulic system of the hydraulic press. Performance and control accuracy. Under normal circumstances, each action in the program will set a different pressure flow rise and fall slope. The default value is set to the fastest (ie 0 seconds). The value can be changed according to different actions. The maximum is 9.9 seconds. For example, When the system is clamped and pressed, the pressure rising ramp can be added appropriately, so as to prevent the doubt of the clamping pressure from overshooting.