Cold pilger rolling mill and method for producing a pipe

A cold pilger rolling mill for cold forming of a hollow into a tube comprising:

• a roll stand with rollers rotatably mounted thereon, wherein the roll stand is motor driven and moveable back and forth in a direction parallel to a longitudinal axis of the hollow between a first roll stand position and a second roll stand position, wherein the first roll stand position corresponds to a front point of return of the roll stand and the second roll stand position corresponds to a rear point of return of the roll stand, wherein the front point of return of the roll stand is in front of the rear point of return of the roll stand in a feed direction of the hollow, wherein the rollers, during a back and forth movement of the roll stand, carry out a rotational motion, and wherein, in an operation of the cold pilger rolling mill, the rollers mill the hollow into the tube,
• a mandrel, wherein the mandrel is mounted by a mandrel bar so that, during the operation of the cold pilger rolling mill, the hollow is milled by the rollers over the mandrel,
• a first feed clamping sledge with a first feed chuck mounted thereon to receive the hollow, wherein the first feed clamping sledge is moveable back and forth in the direction parallel to the longitudinal axis of the hollow between a first sledge position and a second sledge position, wherein the first sledge position corresponds to a front point of return of the first feed clamping sledge and the second sledge position corresponds to a rear point of return of the first feed clamping sledge, wherein the front point of return of the first feed clamping sledge is in front of the rear point of return of the first feed clamping sledge in the feed direction of the hollow, wherein, in the operation of the cold pilger rolling mill, the hollow experiences a stepwise feed in the feed direction towards the mandrel, and wherein the first feed chuck is openable and closeable in a radial direction to release or clamp the hollow,
• at least one mandrel thrust block with a chuck for mounting the mandrel bar, wherein the at least one mandrel thrust block includes a front mandrel thrust block that, relative to the feed direction of the hollow, is located in front of the first feed clamping sledge, wherein, in the operation of the cold pilger rolling mill, the mandrel bar is mountable by the chuck of the front mandrel thrust block, wherein the chuck of the front mandrel thrust block is openable in the radial direction so that the hollow is feedable between the chuck and the mandrel bar, and
• an unwinding device having a spindle, wherein the unwinding device, relative to the feed direction of the hollow, is located in front of the front mandrel thrust block so that the spindle with the hollow wound thereon is receivable at the unwinding device, wherein the unwinding device is rotatable about an axis perpendicular to the feed direction of the hollow and, in the operation of the cold pilger rolling mill, the hollow is unwindable and feedable between the chuck of the front mandrel thrust block and the mandrel bar to the first feed clamping sledge and to the roll stand,
• wherein the front mandrel thrust block is at a distance from the first feed clamping sledge, measured with the first feed clamping sledge at the second sledge position, of at least 30 m, and
• wherein the mandrel bar has a tensile strength of 1000 N/mm2 or more and a strain of 10% or less.