It is usually developed on the basis of ordinary CNC lathes with one or more turret tool holders with multiple tool positions. The processing objects are mainly shafts and disc sleeves and other revolving parts. Since about half of the parts in the rotating body need to be turned, they also need some milling, drilling and tapping. Therefore, the rotating body can be clamped on a lathe at one time. For all or most of the processing, in addition to turning tools, rotating power tools such as milling cutters, drills and taps can be installed on the turret tool holder of the turning center, and the machine tool spindle has a C-axis with CNC precision indexing Function and C and Z axis or and C and X axis linkage function.
Such a turning center can not only turn the inner and outer surfaces (including cylindrical surfaces, tapered surfaces, curved surfaces, etc.) and end faces of rotating parts like ordinary CNC lathes, but also use the C-Z axis linkage function to thread threads and use the C axis. The indexing function and X or Y axis control of the tool holder and the powered rotary tool on it perform drilling and milling off the centerline of the rotating body, thereby greatly expanding the capabilities of CNC lathe composite machining. Figure 3 is the SPINNER company turning center. However, for a single-spindle turning center, no matter how its technological capabilities are expanded, it cannot solve the problem of secondary machining of the back (original clamping end) of the rotary body after one clamping. This is the shortcoming of the single-spindle turning center. and the reason for the development of a new turning center.
