The hydraulic cutting machine consists of the following three basic parts.
1. Mechanical part: It consists of fuselage, working mechanism and stroke adjustment device. The gantry hydraulic cutting machine also includes sliding saddle moving feeding device and automatic feeding device.
2, hydraulic system: consists of hydraulic pump, actuator (hydraulic cylinder), control components (pressure valve, directional valve), accessories (filter, fuel tank, pressure gauge, etc.).
3. Control part: including the electric control circuit composed of components such as switches, relays and contactors, and the photoelectric safety protection device installed in some cutting machines.
The stroke control of the hydraulic cutting machine includes two aspects of upper limit position adjustment and lower limit position control. There are several ways to adjust the upper limit of the working mechanism.
1. Change the position of the travel switch and adjust it by mechanical-electrical-hydraulic interlock control. In the 1960s and 1970s, many hydraulic cutting machines produced at home and abroad used this method to adjust the upper limit position of the working mechanism. In some new cantilever hydraulic cutting machines, there is also a machine-electric-liquid using the traditional hydraulic cutting machine. The type of interlocking control method, such as 8LE, 8LES, 8LEST, 8LEST and other models produced by Scbon, Germany, but using a non-contact switch.
2. Electric: The motor is adjusted by the mechanical transmission mechanism with the power shaft pressure plate, such as the Czech 06135/P1 hydraulic cutting machine with hydraulic swing arm device.
3. Manual: Rotate the handwheel and directly adjust the vertical shaft pressure plate through the spiral motion of the lead screw, such as the British GSB-I hydraulic cutting machine.
4, hydraulic: Rotate the handwheel, automatically adjust through the hydraulic servo system, such as the Italian S series model hydraulic cutting machine.
There are two methods for controlling the lower limit position of the working mechanism of the hydraulic cutting machine.
1. Stroke switch control: By changing the position of the travel switch, it is controlled by mechanical-electric-hydraulic interlocking method, and the signal of the lower limit position of the stroke is given by the travel day switch with contact or the non-contact switch.
2, time control: This control method is to delay the input signal after a certain time delay output, so as to control the suction time of the solenoid valve to achieve the working stroke control, there is a direct use of the control button to input the trigger signal, but also through the hydraulic circuit The change in pressure is input to the trigger signal by the pressure sensing element.