Hydraulic press Bending machine classification
CNC bending machines can divide into three major types, namely, torsion shaft synchronization, hydraulic proportional valve synchronization (also called electro-hydraulic synchronization CNC bending machine), and dual servo pump control synchronization (also called hybrid electric and CNC hydraulic press bending machine)Principle of each CNC hydraulic press bending machine
Principle of each CNC bending machine
Torsion shaft synchronous bending machine: mechanical synchronization forces by torsion.
Hydraulic proportional valve synchronous bending machine: The travel position of the left and right oil cylinders transmit to the computer through the grating ruler or magnetic scale, and the computer controls the synchronization of the left and right oil cylinders through the electro-hydraulic proportional valve.
Double servo pump control synchronous hydraulic press bending machine: the stroke position of the left and right oil cylinders transmit to the computer through the grating ruler or the magnetic grating ruler, and the computer controls the stroke, speed, position, The pressure thus achieves synchronization of the left and right cylinders.
The torsion shaft synchronous CNC hydraulic press bending machine introduction
The torsion shaft synchronous numerical control bending machine specifically relates to a torsion shaft synchronization device of the bending machine.
Its synchronization device includes a synchronous torsion shaft, a swing arm connected to both ends of the synchronous torsion shaft, and a connecting rod connect to the swing arm , One end of the swing arm is movably connect to the synchronous torsion shaft, the other end of the swing arm is movably connect to the connecting rod, the bottom end of the connecting rod provide with a swing arm pier, and a slide provide below the swing arm pier Block reinforcement ribs, the slider reinforcement ribs provide inside the slider and support the slider.
The two ends of the synchronous torsion shaft can synchronize to move, so that the two ends of the slider can move up and down synchronously to meet the requirements of its balance. The torsion axis servo bending machine has the characteristics of reasonable design, simple assembly adjustment, simple part processing, and improved product quality.
The electro-hydraulic servo CNC bending machine introduction
The electro-hydraulic servo CNC bending machine does not need to take special measures during the return (upward) stroke. During the fast-forward phase of the down stroke, on the basis of parallel synchronization, two one-way throttle valves use to eliminate the deviation and ensure a certain Synchronization accuracy is down.
When entering the work-in stage but not yet contacting the workpiece, the two correction plunger cylinders install on the worktable used for further synchronization correction. Imagine that one side comes into contact with the correcting plunger first.
The larger correcting force slows or stops the movement of that side until the other side catches up and contacts the correcting column hydraulic and pneumatic plugs at the same time.
The deflection force can set by the relief valve and read by the pressure gauge. Practice has shown that the synchronization effect is very obvious, this is because the various asynchronous factors can be ignored compared with the correction force.
The CNC bending machine difference
1 The structure of the two sides of the bending slider to ensure synchronization is different. The torsion shaft synchronizes by connecting the rigid shafts of the two cylinder pistons at the same time, and the electro-hydraulic servo synchronizes by the servo synchronization valves on both sides.
2 The electro-hydraulic servo has high synchronization accuracy, real-time error feedback, and strong anti-deflection load capacity of the bending slider; the torsional shaft synchronous bending machine has low synchronization accuracy, no error feedback, and the anti-deflection load capacity of the bending slider is poor.
3 The hydraulic control system of the electro-hydraulic servo bending machine is more complicated than the torsion shaft synchronous bending machine, and the price of the whole machine is also high.
Summary of each CNC bending machine
The torsion shaft synchronization is to adjust the stroke of the cylinder mechanically, and the electro-hydraulic servo is to control the stroke by hydraulic pressure. The torsion shaft is synchronized by the balance shaft, and the electro-hydraulic servo is synchronized by the servo synchronization valves on both sides. The price of CNC bending machine is set according to the customer’s purchase demand, according to the actual situation of the factory.
Due to the high requirements for machining accuracy, more customers have higher requirements for CNC bending machines. The torsion shaft synchronous CNC bending machine has low precision, no error feedback, and the bending slider has poor anti-deflection load capacity; the hydraulic proportional valve is synchronized, with high accuracy, real-time error feedback, and the bending slider has strong anti-deflection load capacity;
Many customers will choose dual-servo pump-controlled synchronous CNC bending machines, and use servo motor speed to change the output flow of the oil pump to meet the needs of the speed of the load under various working conditions, reducing energy loss and improving the efficiency of the system. It reduces energy consumption and reduces the user’s cost of use.
