CNC press brake structure

Structure description

The CNC press brake is an important equipment for the bending and forming of workpieces in the sheet metal industry. Its function is to press the steel plate into parts of various shapes according to the process requirements. As shown in “Structural Schematic Diagram of Hydraulic Sheet Metal press brake”, the frame is mainly composed of left and right columns, worktables, and beams. Left and right oil cylinders are fixed on the column, and the slider is connected with the piston of the oil cylinder and goes up and down along the guide rail fixed on the column. Movement, the lower mold is fixed on the worktable, the upper mold is installed at the lower end of the slider, the hydraulic system provides power, and the electrical system gives instructions. Under the action of the oil cylinder, the slider drives the upper mold downwards and closes the lower mold to realize the folding of the sheet. bend. The left and right columns, workbench and slider (hereinafter referred to as the three major parts) are the key parts of the bending machine. The total weight of the three major parts accounts for 70% to 80% of the total weight of a bending machine. Its strength and rigidity directly determine the operating accuracy, service life of the machine tool, and the accuracy of the workpiece.

1. Slider part: hydraulic transmission is adopted, and the slider part is composed of a slider, an oil cylinder and a fine-tuning structure of a mechanical stopper. The left and right oil cylinders are fixed on the frame, the piston (rod) drives the slider to move up and down through hydraulic pressure, and the mechanical stop is controlled by the numerical control system to adjust the value;

2. Workbench part: controlled by the button box, the motor drives the stopper to move back and forth, and the moving distance is controlled by the numerical control system. The minimum reading is 0.01 mm (the front and rear positions have travel switch limits);

3. Synchronization system: The machine consists of a mechanical synchronization mechanism composed of torsion shafts, swing arms, joint bearings, etc., with simple structure, stable and reliable performance, and high synchronization accuracy. The mechanical stop is adjusted by the motor, and the numerical control system controls the value;

4. Stopper mechanism: The stopper is driven by a motor, and the two screw rods are driven to move synchronously through a chain operation. The numerical control system controls the size of the stopper.

Structural features

1. Adopt all-steel welded structure, with sufficient strength and rigidity;

2. Hydraulic drive, the cylinders at both ends of the machine tool are placed on the sliding block to directly drive the sliding work;

3. The slider synchronization mechanism adopts torsion shaft for forced synchronization;

4. Using mechanical block structure, stable and reliable;

5. The stroke of the slider can be adjusted quickly by motor, fine-tuned manually, and the counter is displayed;

6. Oblique wedge-type deflection compensation mechanism to ensure higher bending accuracy.