Working digital controlled lathe for inner chamber of differential casing

The utility model discloses a machining equipment, in particular to a numerical control lathe for machining of the inner chamber of a differential shell, and is mainly used for processing a ball surface and an end surface of the inner chamber of the different shall for automobiles. The equipment is composed of a lathe body (1), a lathe saddle (3) which is longitudinally moved along the lathe body (1) and arranged on the lathe body (1), a lower sliding plate (5)which is transversely moved along the lathe body (1) and arranged on the lathe saddle (3), the utility model is characterized in that a rotating table is provided on the lower sliding plate (5), a knife seat (8) is fixed and connected with a rotating disc (7) on the rotating table and a servo motor (10)which drives the rotating disc (7) is connected with a numerical control system. Compared with the prior art, the utility model has the advantages that after replacing a former knife tower, an index plate rotating table is driven by the servo motor and controlled by the numerical control system to make the rotating table rotate any angle around the center of the rotating table, which matches moving of the lower sliding plate and the lathe saddle to make a cutting tool pass through a shaft hole of a differential shell with the radial size less than that of the cutting tool. Processing of surfaces of the inner chamber of the differential shell can be completed in one working procedure, including the ball surface, the left end surface, the right end surface and left and right bearing chambers. Without a plurality of times for loading the cutting tool, the efficiency is increased, processing precision is ensured, the manufacturing cost is low and the quality is sound. The utility model discloses a machining apparatus, particularly a numerically controlled lathe for machining the inner cavity of a speed differentiator shell. The utility model is mainly used for machining the sphere surface and the end surface of the inner cavity of a speed differentiator shell used in a car. The utility model comprises a bed 1; a saddle 3 is installed on the bed 1 and moves longitudinally along the bed 1, and a bottom slide 5 is installed on the saddle 3 and moves horizontally along the bed 1. The utility model is characterized in that the bottom slide 5 is provided with a turn table, a cutter carriage 8 is fixedly connected with a turning disk 7 on the turn table, and a servomotors 10 which drives the turning disk 7 to rot