The hydraulic control system of a hydraulic press brake is like the central brain for the press brake itself. In the production of press brakes, high automation and standardization are required. Therefore, the hydraulic system is also limited to hydraulic control methods, and different structural types and principles of these methods have been widely recognized in the market.
1. Central Control Block
The central control block combines three control blocks into one. It is mainly used in certain special-structured press brakes. Due to control reasons, the connecting pipes between the control block and the two punching hydraulic cylinders must be arranged symmetrically and ensure that they do not exceed the maximum allowable distance between the two hydraulic cylinders (approximately 3m). Therefore, the central control block should be arranged as centrally as possible in the machine.
2. Three Control Blocks
This design consists of three control blocks. Two main control blocks with intermediate plate fill valves are directly installed on the hydraulic cylinders, achieving a pipeless connection between the main control block and the hydraulic cylinder chamber. The main control block of the press brake is mainly composed of important proportional directional valves, position monitoring directional valves, and backpressure components.
3. Sensor and Axis Interface Distributor
In the application of the central control block in the press brake, all solenoid valves are centralized in one control block. Similarly, the electrical connections of each valve are also concentrated on one cable, achieving common wiring. Therefore, an interface distributor is also set on the central control block of the press brake.
Instructions for Using a Hydraulic Press Brake
1. First, turn on the power and switch on the key switch on the control panel. Then press the pump start button, and you will hear the sound of the pump rotating. (At this time, the machine does not move.)
2. Stroke adjustment is essential when using a press brake. Before bending, it is necessary to perform a test run. When the upper die of the press brake reaches the bottom, there must be a thickness gap. Otherwise, it may cause damage to the mold and the machine. Stroke adjustment can be done through electric rapid adjustment and manual fine adjustment.
3. Select the bending groove width. Generally, the width of the bending groove should be around 8 times the thickness of the plate. For example, if bending a 4mm plate, a groove width of around 32 is required.
4. Backgauge adjustment usually has electric rapid adjustment and manual fine adjustment, similar to a shearing machine.
5. Step on the foot pedal switch to start the bending process. Unlike a shearing machine, the press brake can be released at any time. When the foot is released, the press brake stops, and it continues to descend when the foot is pressed again.
