The middle beginning of CNC machining is developed from a CNC milling machine. In the late 1940s, the United States began to discuss CNC machine tools. In 1952, the first CNC milling machine was successfully developed in the servo laboratory of the Massachusetts Institute of Technology (MIT) and put into use in 1957. The first machining center was first developed successfully by the American Carney-Terek Company in 1958. On the basis of the numerical control horizontal boring and milling machine, it adds active tool changing equipment, and then after the workpiece is clamped once, it can carry out the assembly processing of various processes such as milling, drilling, boring, reaming and tapping. This is a major breakthrough in the development of manufacturing skills, marking the beginning of the era of CNC machining in the manufacturing field.
Numerical control machining is the foundation of modern manufacturing skills, and this creation has epoch-making significance and far-reaching influence on the manufacturing profession. Major industrial developed countries in the world are paying close attention to the research and development of NC machining skills.
Since the 1970s, the CNC machining center has developed rapidly, showing a replaceable headstock machining center, which is equipped with several multi-spindle headstocks equipped with cutting tools that can be actively replaced and can simultaneously perform multi-hole machining on workpieces. In 1958, China began to research and develop CNC machine tools, successfully developed CNC beds equipped with sub-tube CNC systems, and in 1965, mass production of three-axis CNC milling machines equipped with transistor CNC systems began. Through decades of development, the current CNC machine tools have completed computer control and are widely used in industry, especially in the mold making profession.