The composition and control methods of hydraulic cutting machine are briefly introduced.
The hydraulic cutting machine is made up of three basic parts.
1, mechanical part: the body, the working mechanism and the stroke adjustment device, the Longmen hydraulic cutting machine also includes the sliding saddle moving feed device and the automatic feeding device.
2, hydraulic system: composed of hydraulic pump, executive element (hydraulic cylinder), control element (pressure valve, Fang Xiangfa), auxiliary parts (filter, fuel tank, pressure gauge, etc.).
3, control part: the electrical control circuit consisting of switches, relays, contactors and other components, as well as a part of the photoelectric safety protection device installed.
The stroke control of the hydraulic cutting machine includes two aspects: the upper position adjustment and the lower limit position control. There are several ways to adjust the upper limit of its working mechanism.
1, change the position of the stroke switch and adjust it by the way of mechanical electric hydraulic interlocking. In the twentieth Century 60~70 years, many hydraulic cutting machines produced at home and abroad were used in this way to adjust the upper limit of the working mechanism. In some new type of cantilever hydraulic cutting machines, there were also the types of mechanical and liquid interlocking control methods used by traditional oil pressure cutting machines, such as 8LE, 8LES, 8LEST, 8LE produced by German scbon company. ST and other models, but the use of non-contact switches.
2, electric motor: motor is adjusted by mechanical transmission mechanism with power shaft platen, such as Czech 06135/P1 hydraulic cutting machine with hydraulic swing arm device.
3, manual: rotate the handwheel, directly drive the vertical axis pressure plate adjustment through the screw screw movement, such as the British GSB-I hydraulic cutting machine.
4, hydraulic: the hand wheel is rotated by a hydraulic automatic adjustment, servo system, hydraulic cutting machine Italy S series models.
There are two ways to control the lower position of the working mechanism of the hydraulic cutting machine.
1, stroke switch control: by changing the position of the stroke switch, it is controlled by mechanical - electric - hydraulic interlocking, and the signal of controlling the lower limit of the stroke is given with the travel and non - contact switch with contact.
2, time control: this control method is a time delay circuit to delay the input signal after a certain time output, thus controlling the absorption time of the solenoid valve to realize the work stroke control, the trigger signal is input directly with the control button, and the trigger signal is input by the pressure sensor element of the hydraulic circuit pressure.