A press brake is a machine tool used in the metal fabrication industry to bend sheet metal and plate material. It utilizes a punch and die to create precise bends in the material. The term "NC" refers to "Numerical Control," which means the press brake is operated using a computerized control system.

An NC press brake is equipped with a computer numerical control (CNC) system that allows for programmable control of the bending process. This system enables operators to input specific parameters such as the desired bend angle, bend length, and backgauge position. The CNC control system then translates these inputs into commands that drive the machine's hydraulic or mechanical mechanisms, precisely controlling the bending process.

NC press brakes offer several advantages over manual or mechanical press brakes. The computerized control system provides higher accuracy, repeatability, and flexibility in the bending operations. Operators can store and recall bending programs, making it easier to produce complex parts with consistent results. The CNC system also simplifies the setup process, reducing the time required to change between different bending tasks.

Additionally, modern NC press brakes often come with features like automatic tool changing systems, angle measurement systems, and graphical user interfaces that enhance productivity and ease of use.

It's worth noting that since my knowledge is based on information available up until September 2021, there may have been advancements or new developments in NC press brake technology since then.