Hydraulic punching machine is a device that uses hydraulic principle to realize the stamping processing of workpieces. Its working principle mainly includes the following steps:

1. Hydraulic system: The hydraulic punching machine is powered by the hydraulic system, which mainly includes oil pump, oil tank, motor, hydraulic cylinder, hydraulic valve and other components. The oil pump is driven by the motor to suck the hydraulic oil from the oil tank, which is controlled by the hydraulic valve and transmitted to the hydraulic cylinder to generate thrust and pressure.

2. Workpiece clamping: The workpiece is clamped on the workbench by the fixture to make it stable and immobile for stamping processing.

3. Lower punch: The lower punch of the hydraulic punching machine is controlled by the hydraulic cylinder to move up and down. It has a punch and can stamp the workpiece at the agreed position.

4. Stamping process: When the hydraulic cylinder is started, the lower punch drives the punch to move downward. With the assistance of the punching die, the punch stamps the workpiece to complete the required processing technology.

5. Upper punch: Some hydraulic punches are also equipped with upper punches, which can perform continuous punching of multiple processes to improve production efficiency.

6. Control system: The hydraulic punch controls the operation of the hydraulic system through the control system to achieve various functions, such as adjusting the processing stroke, adjusting the working speed, matching the working conditions, etc. The hydraulic punch can also realize functions such as automatic feeding and automatic receiving.