In recent years, with technological advancements and continuous development in the sheet metal processing market, the technological revolution of sheet metal processing equipment has never ceased. CNC turret punch presses have transitioned from mechanical to hydraulic drive modes and finally adopted servo motor drive technology in the early 21st century. Additionally, the laser oscillators of industrial laser cutting machines used in the sheet metal processing field have undergone a technological revolution from CO2 oscillators to fiber oscillators. These technological changes have significantly improved the production accuracy, cost-effectiveness, and efficiency of the sheet metal processing industry.
Evolution of Press Brake Drive Modes
As the most critical equipment in sheet metal processing, the press brake has undergone transitions from mechanical to hydraulic drive and further to hybrid oil-electric drive modes. Currently, servo motor drive technology is advancing to replace the hybrid oil-electric drive mode. The mainstream press brakes utilize the following three drive modes:
Electro-hydraulic valve control drive mode
This mode uses a hydraulic pump and hydraulic valves to provide driving force, adjusting processing accuracy by controlling the opening and closing times of hydraulic valves. It offers lower processing accuracy suitable for applications with less stringent precision requirements. Moreover, fluctuations in hydraulic oil temperature significantly affect processing accuracy, making operation more challenging and demanding for equipment users.
Oil-electric hybrid pump control drive mode
This mode employs a servo motor to drive a piston pump to provide pressure, with the flow rate and direction of hydraulic oil controlled by the servo motor. This approach enables more precise hydraulic oil pressure output, thereby enhancing processing accuracy and efficiency. Additionally, it reduces the impact of temperature changes on accuracy due to lower hydraulic oil usage, thus lowering operator requirements.
Full electric servo drive mode
This mode employs a servo motor to drive a piston pump to provide pressure, with the flow rate and direction of hydraulic oil controlled by the servo motor. This approach enables more precise hydraulic oil pressure output, thereby enhancing processing accuracy and efficiency. Additionally, it reduces the impact of temperature changes on accuracy due to lower hydraulic oil usage, thus lowering operator requirements.
Advantages of Full Electric Servo Press Brakes High processing accuracy
Full electric servo press brakes excel in maintaining precision in processing angles and dimensions. Servo motors drive based on digital instructions, ensuring high positional and repetitive positioning accuracy, simplifying operation without relying on operator experience.
High processing efficiency
The high acceleration and speed of servo motors enhance the overall processing efficiency of press brakes. Test data shows that the working efficiency of full electric servo press brakes can reach 1000 to 1200 bends per hour, whereas traditional electro-hydraulic valve control press brakes achieve only 300 to 500 bends per hour.
Low energy consumption and maintenance costs
Servo motors can generate electricity when in passive motion, consuming less power. Models below 60 tons consume only 1 kWh, compared to 10 kWh for electro-hydraulic valve control press brakes. Furthermore, maintenance involves simple lubrication oil addition, resulting in low maintenance costs.
Conclusion
Despite significant advantages in processing accuracy, efficiency, and energy consumption, full electric servo press brakes face limitations, particularly in high-power applications, leading to most models on the market being under 2 meters. As technology advances and market acceptance grows, more sheet metal manufacturing enterprises will adopt full electric servo press brakes, driving continuous development in the sheet metal manufacturing industry.
Quiénes somos
Durmapress specializes in designing, manufacturing and selling various metal processing equipment, including bending machines, shears, punches, laser cutting machines, etc. The company was founded in 2000. With years of experience and technology accumulation. DurmaPress has become one of the well-known brands in China's metal processing machinery industry.
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