Bending machine function and operation process

Author: admin    NewsSource: Site author    Hits:     Updated: 2010-7-30
Bending machine main work is characterized by two parallel motion work hydraulic cylinder downward pressure on forming a vertical bending beam to drive, the mould for bending. Its numerical control type bouba horse hydraulic control system, main is to control the process of bending the synchronization operation and hydraulic cylinder in full working machines, next dead spots.
Typical of the bending beam bending process movement cycle stages:
(a) state of rest,
Bending machine on the static bending beam position is in dead spots. In order to prevent without controlled by a downward motion, leakproof back-pressure valve closed hydraulic cylinder of a cavity.
(2) downward motion
Ordinary bending machine downline fast closing motion mostly using free born form, by bending machine and attachments of self-respect. In this process produces movement of hydraulic cylinder is stem cavity through a filling valve oil, will produce a cavity pressure. Fast speed can reach 250mm/s, the proportional direction valves open or closed loop control. Fast movement from the dead spots began, after a short period, the braking distance 6mm plate bend at the end. Various requirements of different bending machine of the end).
(3) stamping/bend
On the other hand stamping/bend stage from pole stamping press start building. Cavity pump injection quantity speed on the one hand, the restrictions, but through proportional valve direction valves. At the same time, the direction and control valve of bending beam under the dead spots and synchronous. The limit by the pressure of blunt proportion of pump pressure relief valve limited. Speed, position and pressure from the given value is synchronous control.
(4) pressure
No stem cavity pressure is in reach of or under dead spots, or is in a short time after the start of that material deformation, therefore can produce flow time to further improve the dimension precision stamping pressure and decompression. According to the proportion of the direction valve control instructions to complete the operation according to requirement. The cycle time, must make decompression time as short as possible, But in order to avoid in the system produces unloading, and long enough. Anyhow, the pressure curve does not allow is too steep. The whole process of smooth requirements through optimizing proportional direction valves.
(5) return
Pump and hydraulic cylinder of a cavity pressure area, determines the maximum return rate in most cases, the rapid speed to return from a cavity. To end the dead spots depressurization. Return also requires synchronization operation.