A device and method for continuously producing an at least partly hollow shaft having a varying inner diameter includes forging tools that are arranged centrally symmetrically about a forging axis and are driven radially, a clamping chuck for holding an at least partly hollow cylindrical blank, and a counter-holder for axially supporting the blank. The counter-holder has a base and a counter-holder mandrel arranged on the base and extending axially into a central cavity in the blank. The mandrel is formed of at least two parts, wherein a first part of the counter-holder mandrel constitutes an inner part and a second part of the counter-holder mandrel constitutes an outer part surrounding the inner part. At least the outer part can be moved axially relative to the inner part.

A method for radial forging a workpiece from an initial state to an end state, preferably follows a pass schedule multiple times from an initial state to an end state, by means of a radial forging machine with forging tools, preferably four forging tools, arranged around the periphery of the workpiece. The radial forging machine is designed and configured to perform the radial forging in at least three modes of operation, A) radial forging in spiral mode, B) radial forging in straight mode and C) radial forging in flat mode. The shaping of the workpiece from an initial state to an end state is a sequence of radial forging passes. At least two of the three different modes of operation are applied in succession.

A method for radial forging a workpiece from an initial state to an end state, preferably follows a pass schedule multiple times from an initial state to an end state, by means of a radial forging machine with forging tools, preferably four forging tools, arranged around the periphery of the workpiece. The radial forging machine is designed and configured to perform the radial forging in at least three modes of operation, A) radial forging in spiral mode, B) radial forging in straight mode and C) radial forging in flat mode. The shaping of the workpiece from an initial state to an end state is a sequence of radial forging passes. At least two of the three different modes of operation are applied in succession.

The system described herein relates to working a metal casting strand that is round in cross-section, by reducing the cross-section in the final solidification region with the aid of at least three forming tools which are distributed around the circumference and act simultaneously on the casting strand. In order to provide advantageous working conditions, the casting strand is formed by forging tools constituting the forming tools in a longitudinal portion for each forming stroke, which portion corresponds to at least a fourth of the strand diameter before the reduction in cross-section. The forging tools are rotated by an angle step about the axis of the casting strand 1 between the forming strokes.

The system described herein relates to working a metal casting strand that is round in cross-section, by reducing the cross-section in the final solidification region with the aid of at least three forming tools which are distributed around the circumference and act simultaneously on the casting strand. In order to provide advantageous working conditions, the casting strand is formed by forging tools constituting the forming tools in a longitudinal portion for each forming stroke, which portion corresponds to at least a fourth of the strand diameter before the reduction in cross-section. The forging tools are rotated by an angle step about the axis of the casting strand 1 between the forming strokes.

Radial forging of long products made of metal workpieces in a radial forging machine uses at least four forging tools arranged around the circumference of the workpiece, which are set up and adapted to simultaneously carry out the forging operation. An automatic pass schedule calculation includes entering start parameters for the radial forging process into a pass schedule calculation program and defining target parameters for the radial forging process. The pass schedule calculation program calculates a pass schedule or a forging sequence based on these start and target parameters. The pass schedule calculation program determines a temperature variation and the temperature distribution over the cross section of the long product and takes into account the change in shape during radial forging.

Radial forging of long products made of metal workpieces in a radial forging machine uses at least four forging tools arranged around the circumference of the workpiece, which are set up and adapted to simultaneously carry out the forging operation. An automatic pass schedule calculation includes entering start parameters for the radial forging process into a pass schedule calculation program and defining target parameters for the radial forging process. The pass schedule calculation program calculates a pass schedule or a forging sequence based on these start and target parameters. The pass schedule calculation program determines a temperature variation and the temperature distribution over the cross section of the long product and takes into account the change in shape during radial forging.