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Sheet Metal Servo Bending Technology Ultimate Guide
Time:2025-04-07     
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Sheet metal servo bending technology is a technology that uses a servo drive system (such as a servo motor or servo hydraulic system) to bend metal sheets with high precision. Compared with traditional hydraulic bending machines, this technology has higher precision, energy efficiency, and intelligence, and is widely used in precision sheet metal manufacturing, automobile manufacturing, aerospace and other industries.

 

1. Introduction to servo bending technology


Servo electro-hydraulic bending principle


Sheet metal servo bending technology is an advanced manufacturing technology that uses a servo drive system (such as a servo motor or servo hydraulic system) to control a bending machine for precise bending.

It adjusts the bending angle, bending force and slider position through a high-precision control system, making the bending process more intelligent and efficient, and greatly improving the bending accuracy and stability.

 

2. Main types of sheet metal servo bending technology


Servo bending technology is mainly divided into the following two types: servo electro-hydraulic bending technology and all-electric servo bending technology. They differ in working principles, application scenarios, advantages and disadvantages, etc.

 

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Servo electro-hydraulic bending technology:

Combining servo motor and hydraulic system, the servo motor controls the movement of the hydraulic cylinder to achieve high-precision bending.

Suitable for sheet metal processing with large tonnage and high precision requirements.

 

All-electric servo bending technology:

Adopts all-electric servo system (such as servo motor + ball screw) to drive the slider to bend, without hydraulic system.

It has the characteristics of high precision, energy saving and environmental protection, low noise, etc., and is suitable for precision sheet metal manufacturing.

 

3. Advantages of servo bending technology



Compared with traditional hydraulic bending machines, servo bending technology has many advantages such as high precision, energy saving and environmental protection, intelligent control, and low maintenance cost. It is widely used in precision sheet metal processing, automobile manufacturing, aerospace and other fields.

 

1) High-precision bending

Closed-loop control system:

The servo motor can accurately control the movement trajectory of the slider, combined with the grating ruler or pressure sensor to ensure the bending angle and position accuracy.

The accuracy can reach ±0.01mm, far exceeding the traditional hydraulic bending machine.

 

Compensation control:

The servo cnc plate bending machine can monitor the material rebound in real time, automatically adjust the bending parameters, and improve the bending quality.

It can adapt to materials of different thicknesses and hardness, reduce the number of trial bends, and improve production efficiency.

 

2) Energy saving and environmental protection

Reduced energy consumption:

Servo press brake bending machines only operate when power is needed, while traditional hydraulic presses need to maintain oil pressure continuously.

Energy consumption is reduced by 50%~80% compared with traditional hydraulic bending machines, which greatly reduces electricity consumption.

 

No hydraulic oil pollution (applicable to all-electric servo bending machines):

No hydraulic system is required to avoid hydraulic oil leakage and reduce environmental pollution.

No oil temperature rise problem during production, which increases equipment life.

 

3) Intelligent control

CNC numerical control system:

Servo bending machines generally use numerical control (CNC) systems, which can store bending programs, realize automatic bending, and improve production consistency.

Bending parameters are directly input through the touch screen or software to reduce operator skill requirements.

 

Automatic compensation and remote monitoring:

Combined with the Industrial Internet (IoT), remote monitoring of equipment status, intelligent fault diagnosis, and improved maintenance efficiency can be achieved.

Advanced models can be equipped with artificial intelligence (AI) algorithms to optimize bending paths and reduce scrap rates.

 

4) Low maintenance cost

Reduced mechanical loss:

The all-electric servo system uses ball screw or gear transmission, with almost no hydraulic system loss, and maintenance requirements are greatly reduced.

The servo motor has a long life and reduces the frequency of replacing parts.

Avoid hydraulic system maintenance (applicable to all-electric servo bending machines):

Traditional hydraulic presses need to regularly replace hydraulic oil, clean oil stains, and check seals, while servo bending machines basically have no such maintenance requirements.

 

5) Low noise and low heat

The servo motor only runs when it is working. Compared with the long-term operation of the hydraulic pump of the hydraulic press, the noise is significantly reduced (≤60dB).

Reduce equipment heating, avoid the impact of hydraulic oil temperature rise on bending accuracy, and improve equipment stability.

 

6) Adapt to a variety of application scenarios

- Precision sheet metal manufacturing: Applicable to high-precision industries such as aerospace, medical equipment, and 3C electronic housings.

- Large tonnage bending: Servo electro-hydraulic press brake machines can be used in automobile manufacturing, building steel structures, heavy machinery and other fields.

- New energy industry: No hydraulic oil pollution, suitable for the manufacture of environmentally friendly products such as solar brackets and battery housings.

 

Servo sheet metal bending technology, with its advantages of high precision, energy saving and environmental protection, intelligent control, and low maintenance, is gradually replacing traditional hydraulic bending machines, and promoting the sheet metal processing industry to develop towards intelligent, efficient, and green manufacturing.

 

4. Development of servo metal sheet bending technology


Servo sheet metal bending technology


The development of servo bending technology has gone through several stages. With the progress of industrial automation and intelligent manufacturing, servo bending machines have made significant breakthroughs in precision, energy efficiency, and intelligence. The following is the development history and trend of servo bending technology:

 

1) Traditional bending machine stage

Traditional bending machines are mainly hydraulically driven, and hydraulic cylinders are used to control the bending force and bending angle.

Due to the problems of high energy consumption, complex maintenance, and slow response speed of the hydraulic system, it is difficult to meet the needs of high-precision processing.

 

2) Servo electro-hydraulic bending machine

The servo electro-hydraulic press brake combines hydraulic and servo control technologies, and uses servo motors to drive the hydraulic system for precise control.

Advantages:

- Adopt a closed-loop control system to improve bending accuracy.

- By reducing the flow loss of the hydraulic system, improve energy efficiency and reduce oil temperature.

- Reduce noise and maintenance costs, which is more energy-efficient than traditional hydraulic presses.

 

3) Pure electric servo bending machine

Adopt a fully electric servo system, replace the hydraulic cylinder with a motor and a ball screw, and achieve full closed-loop precise control.

Advantages:

- High precision: The servo motor controls the bending force and can achieve micron-level precision.

- Energy saving and environmental protection: No hydraulic oil, reduce leakage risk, and reduce energy consumption.

- Intelligent control: Support CNC programming, realize automated operation, and adapt to complex bending needs.

- Low maintenance cost: No hydraulic system, greatly reducing maintenance needs.

 

4) Future development trends

Intelligent and digital: Combine artificial intelligence (AI), industrial Internet (IoT) and big data to achieve intelligent optimization and remote monitoring of the bending process.

Adaptive bending: Use advanced sensing technology to monitor material rebound in real time, and automatically adjust bending parameters to improve one-time forming rate.

Collaborative robotic bending: The human-machine collaborative system improves flexible production capacity and realizes efficient and safe intelligent manufacturing.

Green manufacturing: Further optimize energy consumption management to achieve a more environmentally friendly and low-carbon production model.


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Sheet metal servo bending technology is an important development direction of modern precision sheet metal processing. Through its characteristics of intelligence, high efficiency and energy saving, it is gradually replacing traditional hydraulic bending machines and promoting the manufacturing industry to move towards high-precision, automated and green manufacturing.


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