The invention discloses an indexing
machining system for a long-
barrel-shaped workpiece. The indexing
machining system comprises a lathe
bed, a chuck mechanism, a positioning
assembly, a horizontally-arranged indexing center, a mandrel and a
tail center; an indexing driving device capable of moving transversely, a
tailstock and a supporting device are arranged on the lathe
bed, the indexing driving device is in driving connection with the indexing center, the
tail center is fixedly arranged on the
tailstock, and the indexing center is in transmission connection with the mandrel through the chuck mechanism. According to the indexing
machining system for the long-
barrel-shaped workpiece, radial positioning of the mandrel is completed through cooperation of the supporting device, the influence of the gravity of the mandrel and the long-
barrel-shaped workpiece on indexing positioning is eliminated under the supporting effect of the supporting device, the indexing center and the
tail center abut against one end of the mandrel correspondingly under cooperation of the indexing center and the tail center, the positioning deviation of the mandrel is greatly reduced, the mandrel, the indexing center and the tail center are located at the same coaxiality, axial positioning of the mandrel and the workpiece is achieved more accurately, and it is guaranteed that the machining position of a
laser is accurate.