Patent ID: 8438897
Filing Date: 2013-05-14
Classification: B21D

Abstract:
1. A forming device for cup-shaped hollow bodies comprising a machine frame, a drive device, a workpiece turntable for holding workpiece holders which are designed to fix hollow bodies and a tool holder for holding machining tools wherein the workpiece turntable and the tool holder are located opposite one another and can rotate relative to one another about an axis of rotation and can move linearly relative to one another along the axis of rotation, wherein the drive device is designed to provide a rotational step movement and a cyclic linear movement between the workpiece turntable and the tool holder in order to allow a forming of the hollow bodies by means of the machining tools in a plurality of successive machining steps, and wherein the workpiece turntable is assigned at a locking position a first actuating means for triggering a locking movement on the respective workpiece holder and at an unlocking position a second actuating means for triggering an unlocking movement on the respective workpiece holder, wherein a third actuating means is arranged along a curved machining path for the hollow bodies between the locking position and the unlocking position, said third actuating means being designed to trigger a combined unlocking and locking movement on the respectively associated workpiece holder in order to at least partially unlock, and then lock once again the hollow body held in the respective workpiece holder during one cycle of the cyclic linear movement of the tool holder.