NC press brake, also known as numerical control press brake, is a metal sheet processing equipment that uses a digital control system (CNC) to achieve automated bending operations.It is widely used in industries such as automobiles, aircraft manufacturing, shipbuilding, home appliances, and building decoration, to bend metal sheets into various geometric shapes and cross-sections in a cold state.

1、 Working principle

The working principle of the NC press brake is based on the coordination of the upper and lower molds, and the precise control of the descent of the upper mold and the support of the lower mold through the numerical control system, achieving the bending and forming of the sheet metal. The specific process is as follows:

（1）Numerical Control System Programming: Based on the bending shape and size requirements of the workpiece, parameters such as bending angle, bending sequence, and bending force are set through numerical control system programming.

（2）Mold installation and adjustment: Select appropriate upper and lower molds, install them on the NC press brake, and adjust the position and gap of the molds to ensure bending accuracy.

（3）Plate positioning and clamping: Place the plate to be bent on the workbench, fix the plate with positioning and clamping devices, and prevent the plate from moving during the bending process.

（4）Bending operation: Start the NC press brake, and the CNC system controls the upper mold to descend according to the preset program to bend the sheet metal. After the bending is completed, the upper mold rises and the workpiece is removed.

2、 Main components

The NC press brake mainly consists of the following parts:

（1）Body: The main structure of the NC press brake, supporting the entire equipment and withstanding the forces during the bending process.

（2）Hydraulic system: Provides the power required for bending, driving the upper mold to descend and the lower mold to support.

（3）Numerical Control System: The "brain" of the NC press brake, responsible for program development, storage, and execution, and precise control of the bending process.

（4）Workbench: a platform for placing boards, equipped with positioning and clamping devices.

（5）Upper and lower molds: Components directly involved in bending operations, where the upper mold descends to apply pressure to the sheet metal and the lower mold supports the sheet metal.

Maofeng NC press brake product configuration：

01.Oil Pump Motor

Siemens Motor, Strong power, low working noise and long service life.

02.Sunny Oil Pump

Small size, easy to operate. Long service life,low noise. Easy to dissipate heat.

03.Rack and pinion synchronization

High-quality rack and pinion synchronized structure, strength, high performance and stability.

04.Travel Switches

Branded travel switches have a higher frequency response and lower failure rate, resulting in higher speed and smoother ma.chine operation.

05.Rexroth Valve Group

Bosch (Rexroth) integrated hydraulic system has a compact structure to ensure stable and reliable performance of the whole machine.

06.Schneider Electric Components

Schneider electrical components are selected,all in accordance with DlN and lSO standards,safe and reliable.

07.Optional Back Gauge System

High quality ball screw and linear guide are used to ensure the accurate positioning of the workpiece, so as to process the workpiece meeting the requirements.

08.Mechanical Compensation

By CNC control system, precise compensationis obtained to ensure high quality bending accuracy.

09.NC Press Brake system (optional)

3、 Type and synchronization method

According to different synchronization methods, NC press brake can be divided into the following types:

（1）Torque axis synchronization: The synchronous movement of the left and right oil cylinders is achieved through a mechanical torque axis, which is suitable for applications with low precision requirements.

（2）Hydraulic proportional valve synchronization: By using hydraulic proportional valves to control the flow and pressure of the left and right oil cylinders, synchronous motion can be achieved with high accuracy.

（3）Dual servo pump control synchronization: By controlling the displacement and pressure of the oil pump through servo motors, precise synchronization of the left and right oil cylinders is achieved, with the highest accuracy but relatively high cost.

4、 Characteristics and advantages

（1）High precision: The CNC system can accurately control the bending angle, position, and force, ensuring the machining accuracy of the workpiece.

（2）High efficiency: With a high degree of automation, it can achieve multi-step continuous processing and improve production efficiency.

（3）Flexibility: Strong adaptability, capable of processing boards of different materials, thicknesses, and shapes.

（4）Intelligence: Equipped with data transmission function, it can achieve remote monitoring and management, facilitating production optimization.

5、 Application Fields

NC press brakes are widely used in the following fields:

Automotive manufacturing industry: used for producing complex parts such as car doors and frames.

Aerospace industry: used for processing high-precision parts such as aircraft structural components.

Home appliance manufacturing industry: used for producing large items such as washing machine casings and refrigerator door panels.

Building decoration industry: used for processing stainless steel plates, doors and windows, and other decorative parts.

6、 Operation and maintenance

Preparation before operation: Wear labor protection equipment, check machine performance, program settings, mold status, etc., to ensure safety.

Programming and debugging: Program according to the requirements of the workpiece, debug the position and gap of the mold, and conduct empty running tests.

Processing process: Start the bending machine, perform bending operations according to the program, pay attention to monitoring the processing process to ensure quality.

Maintenance: Regularly inspect hydraulic systems, CNC systems, molds, and other components, replace worn parts in a timely manner, and keep equipment clean.

7、 Development Trends

With the development of Industry 4.0 and intelligent manufacturing, NC press brakes are moving towards greater automation, intelligence, and personalization. In the future, NC press brakes may increasingly adopt AI algorithms to optimize bending parameters, reduce manual intervention, and improve production efficiency and product quality.

In summary, NC press brake is a high-precision and high-efficiency metal sheet processing equipment widely used in various industries. With the continuous advancement of technology, NC press brakes will play a more important role in the field of metal processing.