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Comparison:Electro-Hydraulic, Single Servo, Servo hybrid Press Brake
Time:2022-07-26     
Visits:244

Now when customers purchase CNC hydraulic press brake machines, the customers do not know how to choose a suitable type press brake machine from a wide variety of models.

Today we analyze CNC Electro-hydraulic press brake machine, CNC Single servo press brake machine, CNC Servo hybrid press brake machine, the 3 kinds of press brake machines, which is more suitable for you. 


1. Difference from performance characteristics


Electro-Hydraulic, Single Servo, Servo hybrid Press Brake


1) CNC Electro-hydraulic press brake machine

- All-steel welded structure, aging treatment, high strength and good rigidity. Hydraulic upper drive type, stable and reliable. 

- Proportional servo valve drive, the hydraulic system equipped with overload protection function, which can make sure extremely high synchronou accuracy. The machine any point of the stroke can be controlled precisly, and the repeatability of the slider is ±0.01mm. 

- The machine has the strong anti-eccentric load capability. 


2) CNC Single servo press brake machine 

On the basis of Electro-hydraulic press brake machine, we change the main motor to be a servo main motor, the use of the servo main motor makes the system low energy consumption during working interval. Compared with the same model of Electro-hydraulic press brake, the energy of single servo press brake machine can save rate around 30%.


3) CNC Servo hybrid press brake machine 

- Servo hybrid press brake machine is with two servo motors, which can make the system low energy consumption in the working interval. Excellent energy-saving effect, compared with the same model of electro-hydraulic press brake machine, the energy-saving rate upto 70%.

- The distribution of hydraulic oil is basically distributed on demand among the system, without throttling loss. Real energy saving can be achieved.

- When the ambient temperature upto 38°C, after long time continuous working, the oil temperature will not exceed 50°C, which reduces the risk of oil leakage, increases the stability, and extends the service life of all seals and machine hydraulic cylinders.

- The position accuracy of the slider or workpiece accuracy is not lower than that of the proportional valve control system, or even higher. After the actual test, the repeated positioning accuracy of the slider upto ±0.01mm, the highest accuracy till 0.005mm.

- The amount of oil used is reduced by 70% compared with the same model of other types hydraulic press brake machine. 

- The work is more efficient, the efficiency up to 30% higher than the same model of other type hydraulic press brake machine. 

- Eco-friendly. It is silent when standby. In the process of using the same model, the noise is basically controlled below 65db, which improves the superiority of the working environment.


2. Difference from machine structure


1) CNC Electro-hydraulic press brake machine

The synchronization of the main oil cylinders on both sides of the CNC electro-hydraulic press brake machine adopts hydraulic control system such as proportional electro-hydraulic servo valves and raster ruler to form a closed-loop control system, which is independently controlled by the CNC system, and feedback accurate data to ensure the accurate running precision of the slider.


2) CNC Single servo press brake machine 


CNC Single servo press brake machine


The servo motor will micro-rotate at standby mode. Motor won’t rotate when ram approaching, allow ram fall-down freely. The motor equipped with pressure sensor, so the motor will rotate according to bending pressure when working.


3) CNC Servo hybrid press brake machine 

CNC Servo hybrid press brake machine


- The CNC computer controls the flow and pressure of the Y1 and Y2 oil cylinders through two sets of servo two-way pump systems. 

The oil in the upper cavity of the oil cylinder is directly driven into the lower cavity of the oil cylinder through the oil pump, which can realize the lifting of the upper die. 

The oil pump reserve, the oil in the lower cavity of the oil cylinder directly driven into the upper cavity of the oil cylinder, which can realize sheet metal bending.


- The synchronization of the machine two cylinders is controlled by two sets of servo two-way pumps respectively. Motor, pump, valve, oil tank, filter and oil cylinder are all integrated, no external pipeline, reducing the risk of oil leakage. The servo motors will stop working when the system does not need flow or pressure, reducing noise (≤70dB) and improving the working environment.

Know More About Servo Hybrid Press Brake Machine


3. Difference from machine price


- CNC Electro-hydraulic press brake machine, CNC Single servo press brake machine, CNC Servo hybrid press brake machine, Of the three CNC press brake bending machines, CNC Electro-hydraulic press brake machine is the cheapest. For large press brake machine, especially for machine model more than 250T, the price of CNC Electro-hydraulic press brake machine is relatively more friendly.

- The price of Single servo press brake machine is in the middle, higher than Electro-hydraulic type, but lower than Servo hybrid type. 

- CNC Servo hybrid press brake machine, the price higher than the other two types, but with all the advantages. Energy efficient, and machine with fast speed. For example, servo hybrid type 160T-250T, fast speed can reach 200mm/s, return speed can reach 200-350mm/s. It is more conducive to build large-stroke and ultra-high-speed press brake machine.


4. Difference from machine applications


1) CNC Servo hybrid press brake machine 

- Best choice for factories located in high temperature area, such as south part of China, South-East of Asia countries, and countries near Equator, etc… No worry about the oil temperature increasing, and improve the machine using life in these areas.

- High automation production line, fast speed up to 300mm/s, improve production.

- Connect with Bending Robot, with 24h x 7days working ability, saving 85% energy.

- Workshop near the street or uptown with noise control request.


2) CNC Single servo press brake machine 

Could be a substitute of Servo Pump Controlled CNC Press Brake in some cases.


3) CNC Electro-hydraulic press brake machine

All factories need to use press brake can choose Electro-Hydraulic CNC Press Brake. 



In conclusion, the CNC Servo hybrid press brake machine has obvious advantages. Wuxi shenchong professional in profucing CNC hydraulic press brake machine more than 20 years. Especially servo hybrid press brake machine by Wuxi shenchong, not only saves energy and fuel, but also improves bending efficiency and accuracy, reduces the risk of oil leakage, improve machine service life; reduces noise, improves working environment. 

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