Hydraulic three-roller bending machine, used for medium and heavy-duty bending machine. The frame is solid welded. All rollers are matched with high-quality heavy-duty ball bearings. Since the planetary gears are directly mounted on the rollers, the hydraulic rollers are driven independently The motor and planetary gearbox are driven to ensure that the friction of the bending roller is minimized and the rotation is uniform, and the transmission of force will not cause power loss. Simultaneous use of torsion bars and hydraulic devices to ensure maximum machining accuracy and production flexibility.
Heavy and sturdy cast-iron construction:
rolls of high pressure steel
comfortable eccentric clamp system and easy operation
conical round
wire insert grooves
hardened up gear for high durability
asymmetrical 3-roller system
top roller can tilt out with eccentric closure
High efficiency of thick plate bending work：
Reduced size, easy to transport on medium and large machines
If the two bottom rollers move horizontally, it also means a lower working height, which requires a smaller foundation pit and less anchoring load (in the smallest model, you don't need a foundation).
The W11S machine can achieve the best pre-bending on each required diameter. The possibility of reducing the center distance between the lower rollers enables better pre-bending when bending small diameter and thickness tubes.
Another important future for the W11S machine is the operating system of the top forming roll. In fact, the top forming roll can be
In the same way, a thick cone can also be obtained by bending the sheet multiple times
For some 3-roller and 4-roller cone machines, it is necessary to tilt the top roller to allow removal of the produced tube. On W11S machines, this is unnecessary, so it is easier to remove the finished tube.
General Overview
The hydraulic system is composed of gear pump, valve set, fluid connection parts, hydraulic auxiliary parts and so on.
The hydraulic valves are selected from the stacked valve series, with simple piping arrangement and convenient maintenance and commissioning.
The hydraulic system pipeline needs to be acid cleaned and cleaned before installation.
The system is composed of three circuits: overpressure protection and pressure regulation circuit, synchronization circuit and speed circuit.
The pressure regulating circuit regulates the working pressure of the system through the main relief valve. The system working pressure is 19.5MPa.
The synchronization circuit synchronizes the rising and falling coarse step shunt of the upper roll through the shunt throttle valve, and the throttle valve carries out up and down adjustment; the displacement sensor detects the positioning accuracy of the upper roll synchronization ±0.20mm.
The speed circuit controls the overturning and resetting of the machine on the overturning side, and the throttling speed of the circuit is regulated by the throttling valve.
Various protection
The rising and falling of the upper roller are protected by the relief valve for pressure limit respectively.
V. Electrical control system
General overview
The equipment electric control system is composed of electric control cabinet, operation console and hand-held button box.
Main technical indexes of the system
The system working voltage is 380V/50Hz;
Ambient temperature of -5℃~45℃;
The control circuit adopts PLC programmable controller system with few relays, reliable action and long life.
The control cabinet is equipped with all control buttons, indicators, programmable displays, etc. to complete the product rolling process, in order to monitor and operate and control the whole machine's rolling work status.
Various protection
Each motor has corresponding circuit breaker for over-current short-circuit protection;
Each motor has the corresponding thermal relay for overload protection;
The horizontal movement of the upper roller and the lifting and lowering of the rollers have corresponding limit switches for limit protection;
The overturning and resetting of the overturning cylinder are protected by upper and lower limit switches respectively;
The main power circuit breaker has a sub-excitation decoupler, and there is an "emergency stop" button on the operating table and the portable button box to cut off the main power remotely.
Various interlocks
After the overturning frame is fully reset, the upper roller can be lifted, moved forward and backward, and the lower roller can be forward and reverse (the "overturning frame reset" is detected by the limit switch);
When the upper roller is in the upper position, the horizontal movement of the upper roller and the separate descent of the overturned side cannot be carried out ("upper roller upper position" is detected by the limit switch);
When the working pressure of upper roller pressure relay is more than 1/3P, the upper roller can not move back and forth (pressure relay for detection).
Fault indication
When the lower roller motor and horizontal moving motor are overloaded, the fault indicator will indicate;
When the PLC fails, the fault indicator will indicate.
Numerical control system (economic type)
This system adopts rotary encoder, with highly reliable industrial controller, forming a control system with reliable performance and strong real-time. The CNC system has the functions of real-time monitoring of the rolling process, data transmission and power-off memory, etc. The human-machine interface is intuitive and clear with Chinese display.
The display screen shows the displacement up and down of the upper roller main cylinder (Yg, Yf), the horizontal movement of the upper roller (X), and the adjustment of the carrier roller (H).
The industrial controller PLC detects the position of both ends of the upper roller automatically and controls it to ensure the synchronization accuracy of ±0.15mm. the displacement resolution of the displacement sensor is 0.05mm and the display accuracy is ±0.05mm.
With automatic fault diagnosis function.