xiehe model

A considerable part of the development of turning centers is rotating parts (some estimates account for about 1/2). In addition to turning, processes such as milling, drilling, and tapping are also required. In addition, the processing time of each process of the rotating body is relatively short. Therefore, there is an urgent need to perform multi-process compound machining on the rotating body under one clamping on the machine tool, and finally a compound turning center was developed in the 1970s.

Compared with ordinary CNC lathes, the turret tool holder of the turning-milling compound machining center is equipped with electric tools that can rotate milling cutters, drills and taps.

At the same time, the machine tool spindle also has a C-axis function, which can perform precise indexing and interpolation with the X-axis or Z-axis according to the CNC program. This 3-axis (X, Z, C) control enables turning, milling, drilling, and tapping on a turning center that clamps the part. So far, it is still the most used compound processing machine tool for rotating parts in industrial production.

Since then, the turning center has further developed in the direction of expanding the scope of processing technology. For drilling or milling holes or slots offset from the center line of rotating bodies, a turret tool holder with Y-axis control was developed. A turning center controlled by 4 axes (X, Y, Z, C) was introduced accordingly. However, no matter how the single-spindle turning center expands the processing range, it still cannot solve the problem of secondary processing on the back of the rotating body under one clamping (that is, the processing of the clamping end of the workpiece). The result was the twin-spindle turning center in the 1980s. The two spindles of the machine tool are mostly arranged opposite to each other on the same axis, so as to turn the main end of the rotating body.