Since the Industrial Revolution, the machine tool industry has undergone tremendous changes. Most people know about milling machines, lathes, and drilling machines, otherwise known as ordinary machine tools, which use handwheels by skilled workers to move the tool holder so that the tool travels in the correct direction to where the part is being machined. Ordinary machine tools require operators who have received a long period of professional training and have certain operating skills to process high-quality parts under certain conditions. Relatively speaking, common-equipment has lower processing efficiency and higher cost.
Today, CNC equipment has completely or gradually replaced ordinary equipment in quite a few fields. Unlike ordinary machine tools, the process of CNC-machine tool processing parts is completely automatic, and manual intervention cannot be performed during the processing process. Therefore, first of all, all the information of the workpiece to be processed must be collected, including the technological process, the tool movement trajectory and the cutting direction, the displacement, the technological parameters (spindle speed, feed, depth of cut) and auxiliary actions (tool change, speed change, cooling , clamping, loosening), etc., according to the processing sequence, use the standard or prescribed program instructions to write the correct CNC machining program, and then input it into the control system of the CNC equipment, and then the control system controls the CNC machine tool to the parts according to the requirements of the CNC program. to be processed. The so-called NC programming generally refers to the entire working process including part pattern analysis, process analysis and design, graphics mathematical processing, writing and inputting program lists, and program verification. NC programming can be divided into two ways: manual programming and automatic programming.
The CNC milling machine can perform drilling, boring, tapping, contour milling, plane milling, plane cavity milling and milling of three-dimensional complex surfaces in space. Machining centers and flexible machining units are produced and developed on the basis of CNC milling machines, and their main processing methods are also milling processing methods.