Principles of Electro-Hydraulic Servo CNC Press Brake

Electro-hydraulic servo CNC press brakes are advanced machines widely used in the metalworking industry for precision bending of various materials. These machines combine the benefits of hydraulic power and servo motor control, enabling high accuracy, repeatability, and flexibility in the bending process. This article will delve into the principles behind the operation of electro-hydraulic servo CNC press brakes.

1. Electro-Hydraulic System:
The electro-hydraulic system forms the foundation of the press brake’s operation. It consists of a power unit, hydraulic cylinders, valves, and sensors. The power unit supplies hydraulic fluid under pressure, which is controlled and directed by various valves. Sensors provide feedback to the control system, ensuring precise and accurate control over the bending process.

2. Servo Motor Control:
The inclusion of a servo motor in the press brake system allows for superior control and adjustability. The servo motor is connected to the ram or beam of the press brake and provides precise movement control. The control system processes input parameters such as the desired angle, bending force, and speed, and converts them into appropriate servo motor commands. This ensures accurate positioning and motion control, resulting in consistent and precise bending angles.

3. CNC Control System:
The CNC control system is the brain of the press brake, responsible for programming and executing bending operations. It enables the operator to input bending parameters, such as bend angle, bend radius, and material thickness, through an intuitive user interface. The control system then interprets the input and generates commands for the servo motor and hydraulic system to perform the desired bend accurately.

4. Feedback and Positioning:
To ensure precise and repeatable bending, the press brake employs various sensors for feedback and positioning. These sensors monitor the position, force, and angle during the bending process and provide real-time feedback to the control system. The control system uses this information to make adjustments and corrections, compensating for any deviations and ensuring optimal bending quality.

5. Safety Features:
Electro-hydraulic servo CNC press brakes are equipped with numerous safety features to protect operators and prevent accidents. These may include light curtains, safety interlocks, emergency stop buttons, and overload protection systems. These safety features ensure the machine operates safely and reliably, minimizing the risk of injury or damage.

Conclusion:
Electro-hydraulic servo CNC press brakes combine the power of hydraulic systems with the precision of servo motor control to offer unparalleled accuracy and flexibility in the metal bending process. With their advanced control systems and safety features, these machines have revolutionized the metalworking industry, enabling precise, efficient, and safe bending operations.