Forming device

A forming device for cup-shaped hollow bodies, the forming device comprising:

• a machine frame;
• a workpiece rotary table rotatably supported on the machine frame for accommodating hollow bodies;
• a tool holder movably supported on the machine frame for accommodating processing tools, the workpiece rotary table and the tool holder facing one another and the workpiece rotary table being adapted to turn about a rotational axis in relation to the tool holder and the tool holder being adapted to linearly move in relation to the workpiece rotary table along the rotational axis;
• a drive motor supported by the machine frame;
• an indexing unit connected between the drive motor and the workpiece rotary table for providing a rotary step movement to the workpiece rotary table;
• a drive assembly coupled between the drive motor and the tool holder for providing a cyclical linear movement to the tool holder in order to enable the hollow bodies to be formed by means of the processing tools in a plurality of consecutive processing steps, the drive assembly including an inner eccentric shaft connected to the drive motor, an outer eccentric bush receiving the inner eccentric shaft, a connecting rod coupled between the outer eccentric bush and the tool holder;
• a locking device coupled between the machine frame and the drive assembly for rotatably adjusting the outer eccentric bush with respect to the inner eccentric shaft thereby changing a working stroke of the cyclical linear movement of the tool holder;
• and
• a control device for actuating the locking device for continuously variably adjusting the working stroke.