Numerical control (English name: Numerical Control referred to as: NC) technology refers to the digital instructions composed of numbers, words and symbols to achieve the control of one or more mechanical equipment movements. Numerical control generally uses a general-purpose or special-purpose computer to implement digital program control. Therefore, numerical control is also called computerized numerical control (CNC) and is abbreviated as CNC. Foreign countries are generally referred to as CNC and rarely use the concept of NC. What it controls is usually the mechanical quantity such as position, angle, speed, etc., and the switching quantity related to the flow of mechanical energy. The generation of numerical control relies on the appearance of data carriers and binary data operations. In 1908, a perforated metal foil interchangeable data carrier was introduced; at the end of the 19th century, a control system using paper as a data carrier and supporting functions was invented; in 1938, Shannon conducted rapid data calculation and transmission at the Massachusetts Institute of Technology. Laid the foundation of modern computers, including computer digital control systems. CNC technology is developed in close cooperation with machine tool control. In 1952, the first CNC machine was introduced and became an epoch-making event in the history of the world machinery industry, which promoted the development of automation.
Numerical control technology is also called Computerized Numerical Control (CNC), which is a technology that uses computers to implement digital program control. This technique uses a computer to execute a logic control function of a device's motion track and a peripheral's operation sequence according to a control program stored in advance. As a computer is used instead of a numerical control device originally composed of hardware logic circuits, the realization of various control functions such as storage, processing, calculation, and logic judgment of input operation instructions can be accomplished by computer software, and micro-commands generated by processing are transmitted to The servo drive device drives the motor or hydraulic actuator to drive the device.
The traditional mechanical processing is manual operation of ordinary machine tools. When machining, manual mechanical tools are used to cut metal, and the eye uses a caliper to measure the accuracy of the product. The modern industry has already used computer-controlled machine tools to perform operations. The CNC machine tool can automatically process any product and component directly according to the procedures programmed by the technicians. This is what we call CNC machining. CNC machining is widely used in any field of all machining, and it is the development trend of mold processing and important and necessary technical means.