Electro-hydraulic Press Brake VS Oil-electric Hybrid
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Electro-hydraulic Press Brake VS Oil-electric Hybrid

Views: 76     Author: Site Editor     Publish Time: 2023-08-25      Origin: Site

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Electro-hydraulic Press Brake

An electro-hydraulic press brake is a type of industrial machine used in metalworking and manufacturing processes, specifically for bending and shaping sheet metal into various forms and angles. This machine combines the principles of hydraulic power and electronic control to provide precise and synchronized bending operations.

Electro-hydraulic Press Brake

Main features

1. Hydraulic System: The hydraulic system is responsible for generating the force required to bend the sheet metal. It consists of hydraulic cylinders, pumps, valves, and other components that transmit hydraulic fluid to exert pressure on the metal. This force is adjustable, allowing the press brake to handle various thicknesses and types of sheet metal.


2. Electrical Controls: Unlike traditional mechanical press brakes, electro-hydraulic press brakes use advanced electronic controls to precisely manage the bending process. These controls enable the synchronization of multiple hydraulic cylinders, ensuring consistent and accurate bending along the entire length of the workpiece.

Electro-hydraulic Press Brake

3. Synchronization: Synchronization is a crucial feature of electro-hydraulic press brakes. It ensures that all hydraulic cylinders exert force simultaneously and evenly across the length of the bending bed. This prevents inaccuracies and defects that can occur when using mechanical press brakes.


4. Servo Motors: Electro-hydraulic press brakes often employ servo motors for precise control of the hydraulic cylinders. Servo motors can provide highly accurate positioning, speed control, and synchronization, resulting in consistent and high-quality bending results.

Electro-hydraulic Press Brake

5. CNC (Computer Numerical Control): Most modern electro-hydraulic synchronous press brakes are equipped with CNC systems. These systems allow operators to input bending parameters and control the machine through a user interface. The CNC system stores bending programs, enabling efficient production and quick setup for different bending tasks.


6. Backgauge System: A backgauge system is used to position the sheet metal accurately for bending. It consists of motorized fingers or stops that can be adjusted according to the bending program. The CNC system controls the movement of the backgauge to achieve precise positioning.


7. Safety Features: Safety is a significant concern in any industrial machine. Electro-hydraulic press brakes are equipped with safety mechanisms such as light curtains, emergency stop buttons, and interlocks to protect operators from potential hazards.

Electro-hydraulic Press Brake

8. Flexibility: Electro-hydraulic press brakes are capable of handling a wide range of sheet metal sizes and thicknesses. The CNC system allows for quick reconfiguration and adjustment, making these machines versatile for various bending applications.


In summary, an electro-hydraulic synchronous press brake combines hydraulic power with electronic control to provide accurate, synchronized, and efficient sheet metal bending. This technology offers greater precision, flexibility, and automation compared to traditional mechanical press brakes, making it a preferred choice for modern metalwor king operations.

Electro-hydraulic Press Brake

Oil-electric Hybrid Press Brake

An oil-electric hybrid press brake is an advanced type of industrial machine used for bending and shaping sheet metal. This type of press brake combines both hydraulic and electric technologies to offer improved efficiency, precision, and environmental friendliness. The integration of these two technologies results in a press brake that leverages the benefits of both systems while minimizing their drawbacks.

Electro-hydraulic Press Brake

 

Main features

1. Hydraulic System: Similar to traditional hydraulic press brakes, the oil-electric hybrid press brake utilizes hydraulic power for generating the force needed to bend the sheet metal. However, this hydraulic system is often more energy-efficient and precise than those found in conventional hydraulic presses.


2. Electric Drive System: The electric drive system in a hybrid press brake replaces the traditional mechanical drive system found in many hydraulic presses. Electric servo motors provide the power for precise movement and control of the ram, eliminating the need for large hydraulic components like pumps, valves, and accumulators.

Electro-hydraulic Press Brake

3. Energy Efficiency: One of the key advantages of an oil-electric hybrid press brake is its energy efficiency. Traditional hydraulic press brakes consume energy constantly, even when not actively bending material, due to the need to maintain hydraulic pressure. In contrast, the electric drive in a hybrid system only consumes energy when the machine is in motion, resulting in lower energy consumption and reduced operating costs.


4. Precise Control: Electric servo motors provide precise control over the ram's movement. This level of control allows for accurate positioning, speed control, and synchronization of multiple axes, resulting in high-quality and consistent bending results.

Electro-hydraulic Press Brake

5. Noise Reduction: The reduction of hydraulic components in the machine leads to quieter operation compared to conventional hydraulic press brakes. This can improve the working environment and reduce noise pollution in the manufacturing facility.


6. Maintenance: Oil-electric hybrid press brakes often require less maintenance compared to traditional hydraulic systems. Hydraulic systems involve fluid changes, filter replacements, and other maintenance tasks that are minimized or eliminated in a hybrid system.


7. Environmental Impact: The reduced energy consumption and potential elimination of hydraulic oil leaks contribute to a smaller environmental footprint for oil-electric hybrid press brakes. These machines are generally more environmentally friendly than traditional hydraulic press brakes.

Electro-hydraulic Press Brake

8. Flexibility: Similar to other advanced press brake types, oil-electric hybrid press brakes often come equipped with CNC systems and sophisticated programming options. This enables easy setup for various bending tasks and quick switching between different jobs.


In summary, an oil-electric hybrid press brake offers the advantages of both hydraulic and electric technologies, resulting in a machine that is energy-efficient, precise, and environmentally friendly. These press brakes are well-suited for modern manufacturing operations seeking to improve productivity, reduce energy consumption, and enhance the quality of their sheet metal bending processes.

Electro-hydraulic Press Brake

Comparison of Electro-hydraulic and Oil-electric Hybrid Press Brake

First of all, the electro-hydraulic synchronous bending machine is cheap, suitable for bending large sheet metal, and it is more cost-effective if it is above 250T.


The oil-electric hybrid bending machine, except for the high price, has other advantages. The flow and pressure of Y1 and Y2 oil cylinders are respectively controlled by two sets of servo bidirectional pump systems, and the oil in the upper chamber of the oil cylinder is directly pumped into the lower chamber of the oil cylinder through the oil pump to realize the lifting of the upper mold. The reverse rotation of the oil pump pumps the oil in the lower chamber of the oil cylinder directly into the lower chamber of the oil cylinder to realize the pressing and bending of the upper die. Applicable between 160T-250T, fast down 200mm/s, return 200-350mm/s, the synchronization of the left and right of the upper mold of the machine tool is controlled separately by two sets of servo bidirectional pumps. The machine tool not only has high precision, low friction, high synchronization, energy saving, and low noise, but also saves electricity, fuel, is more stable and reliable, and occupies a small space, which is conducive to the manufacture of large-stroke and ultra-high-speed bending machines.

Electro-hydraulic Press Brake

Advantages of Servo Oil-electric Hybrid CNC Press Brake

The oil-electric hybrid numerical control (pump control) bending machine includes a power unit connected to the numerical control system and a control valve group. The power unit includes a servo motor, a one-way quantitative pump connected to the servo motor, and an independent oil tank; Flow valve, unloading valve, check valve, reversing valve, back pressure valve, poppet valve, safety valve and filling valve. The speed of the servo motor of the power unit is controlled by the numerical control system, and then the displacement of the oil pump connected to it is controlled, so as to realize the displacement speed control of the actuator (double-rod cylinder). Through the torque setting of the servo motor by the numerical control system, the control of the output force of the left and right actuators (double rod cylinders) is realized.

Electro-hydraulic Press Brake

The servo oil-electric hybrid system uses two servo motors and servo pumps to control the left and right oil cylinders. The servo motor controls the output flow of the oil pump according to the program setting, and then controls the movement speed and position positioning of the slider, and there is no throttling phenomenon in the whole process. Therefore, all the energy output by the oil pump is supplied to the left-right oil cylinder. This control method does not have any energy loss, and the energy-saving effect is very prominent.


Since there is almost no energy loss in the oil-electric hybrid, the whole process will not lead to a significant increase in oil temperature, and the oil consumption of this type of machine is also significantly less than that of the electro-hydraulic synchronous CNC bending machine. The oil consumption of general servo oil-electric hybrid is about 30% of the oil consumption of ordinary electro-hydraulic synchronous CNC bending machine. One-third of the oil consumption.

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