The first machining center was first developed in 1958 by the American Carney-Trek company. It adds an automatic tool changer to the CNC horizontal boring and milling machine, which enables centralized machining of various processes such as milling, drilling, boring, reaming and tapping after the workpiece is clamped once. The machining center is a highly automated multi-function CNC machine with a tool magazine and automatic tool changer. After the workpiece is clamped once on the machining center, it can process multiple processes on more than two surfaces, and has a variety of tool change or tool selection functions, which greatly improves production efficiency.
The machining center is divided into two categories according to its machining process: boring and turning, and can be divided into three-axis, four-axis and five-axis machining centers according to the number of control axes.