FAQs

Unlike the hydromechanical press brake that converted hydraulic energy to mechanical energy using a hydraulic motor fixed to an eccentric shaft, the modern hydraulic press brake employs a hydraulic pump and hydraulic cylinders to move the ram. This design significantly enhances efficiency, enabling increased speed and accuracy.
The modern hydraulic press brake can be categorized into two basic subgroups: up-acting and down-acting (all other types of press brakes are down-acting only). The up-acting style was first designed and utilized by the French. In our perspective, the up-acting press brake stands out as the superior type, not only due to the ram’s guidance and arrangement of rollers but also because of its natural antideflection characteristics. Gravity works in favor of the operator, offering a more advantageous working dynamic.
For any mechanical device to have movement, a certain clearance is necessary to allow the mechanism to function freely. On the press brake, a critical clearance exists between the power source and the ram body. While this clearance is optimal when the machine is new or rebuilt, it tends to increase with age and use, leading to excess play in the mechanism. In down-acting presses, this play is located at the bottom when no load is present, shifting to the toe of the connection under load, affecting repeatability and causing variations in bend angles. In contrast, the up-acting press brake consistently maintains this play at the bottom, whether under pressure or not.
Down-acting hydraulic press brakes constitute 90% of all press brakes in use today. Among these, hydraulic press brakes stand out as the most accurate, typically controlled by a CNC or DNC controller (computer numerical control or direct numerical control). These computers, in turn, oversee a proportional valve system, allowing precise control over the ram’s downward movement and ensuring accurate bend angle control.

The press brake machine finds extensive use in steel sheet metal processing, particularly in the following industries:
Decoration Industry:
The CNC press brake machine is essential for bending stainless-steel elevators, steel doors and frames, steel windows, and skirting lines. In some cases, the CNC V-grooving machine is employed after bending to achieve perfect bending angles.
Electric Industry:
The press brake plays a crucial role in electric cabinet production. After the steel sheet is cut by the shearing machine, the press brake is used to bend them into different-sized cabinets using various punch and die types. Segmented tooling, especially for the left and right horns of the punch, is vital for forming the box in the final stage.
Kitchen Industry:
Stainless steel is commonly used in kitchen devices, and the press brake is indispensable for bending them into different shapes before the final product is completed. CNC press brakes with various punch and die options, such as gooseneck punch and 2V die by segments, are commonly used. The machine is also employed for manufacturing HVAC and related products.
Automobile and Ship Industry:
In this sector, large capacity press brakes and CNC press brakes are widely used, demanding higher bending accuracy and efficiency. KRRASS, a press brake manufacturer in China, excels in producing such machines and provides excellent service to customers worldwide.
Aerospace Industry:
The aerospace industry requires high precision, as CNC press brake-produced components are key parts for the final product, and bending tolerance must be within an acceptable range. KRRASS has satisfied customers in this field, known for delivering press brakes that meet stringent requirements.