CNC machining is a kind of process method for parts processing on CNC machine tools. The process rules of NC machine tool processing and traditional machine tool processing are consistent in general. But obvious changes have taken place. The machining method of controlling the displacement of parts and tools by digital information. It is an effective way to solve the problems. Such as variable parts, small batch, complex shape, high precision and high efficiency and automatic processing.
Numerical control machining is a kind of processing that the control system sends out instructions to make the tool move in accordance with the requirements, and represents the shape and size of the workpiece in the form of numbers and letters. It generally refers to the process of machining parts on CNC machine tools.
CNC machine use computer to control tools. The computer used to control the machine tool, whether it is a special computer or a general-purpose computer, is collectively referred to as the numerical control system. The motion and auxiliary action of NC machine tool are controlled by the instruction of NC system.
Programmer comply the instruction of CNC system. According to the material of the workpiece, processing requirements, characteristics of the machine tool and the instruction format (NC language or symbol) specified by the system. According to the program instruction, the CNC system sends operation or terminal information to the servo device and other functional components to control the various movements of the machine tool. When the processing program of the part finish, the machine will stop automatically.
Any kind of numerical control machine tool can’t work without inputting program instruction in its numerical control system. The controlled action of the machine tool generally includes the start and stop of the machine tool; the start and stop of the spindle, the change of the rotation direction and speed; the direction, speed and mode of the feed motion; the selection of the tool, the compensation of the length and radius; the replacement of the tool, the start and close of the coolant, etc.