Abstract: A method for producing a thread on at least one end of at least one metal tube (3) by machining the metal tube (3) in at least one CNC-controlled machine tool (2) comprises an optical measurement of the thread during the thread-cutting process and/or following the thread-cutting process, and the electronic detection and evaluation of the measurement data of the thread profile and/or of a sealing lip (6) of the thread, and the derivation of control commands for controlling the machine tool (2) from the measurement data with use of at least one closed-loop control unit coupled to the machine tool (2). A corresponding thread-cutting facility is also disclosed.

Abstract: A cross-rolling mill for rolling a block over a mandrel forms a hollow block. It includes a plurality of working rollers, each of which exerts a substantially radially aligned rolling force onto the block. The working rollers are supported in a roll stand, and the gap between the working rollers and preferably also the alignment of the rolling axis of at least one of the working rollers relative to the block can be modified. Hydraulic actuators, preferably hydraulic capsules, are provided in order to modify the rolling gap and preferably also the alignment of the rolling axis of at least one of the working rollers relative to the block.

Abstract: An apparatus for measuring a thread includes a holder for detachably holding a tube having a thread formed at an end of the tube. A first optical measuring section having an optical sensor is attached to a manipulator in order to move the measuring section relative to the tube. The optical measuring section is adjustably tiltable about a first adjusting axis relative to a thread axis of the thread. A second optical measuring section having a second optical sensor is arranged at the manipulator, wherein the optical measuring sections collectively form a measuring channel to provide simultaneous measurement of opposite sides of the thread of the tube.

Abstract: A cross-rolling mill for rolling a block over a mandrel forms a hollow block. It includes a plurality of working rollers, each of which exerts a substantially radially aligned rolling force onto the block. The working rollers are supported in a roll stand, and the gap between the working rollers and preferably also the alignment of the rolling axis of at least one of the working rollers relative to the block can be modified. Hydraulic actuators, preferably hydraulic capsules, are provided in order to modify the rolling gap and preferably also the alignment of the rolling axis of at least one of the working rollers relative to the block.

Abstract: The invention relates to an apparatus for measuring a thread (1), comprising a holder for detachably holding a tube (2), wherein the thread (1) is formed at one end of the tube (2), a first optical measuring section (5) having an optical sensor (5a), wherein the optical measuring section (5) is attached to a manipulator (3) in order to move the measuring section (5) relative to the tube (2), and wherein the optical measuring section (5) is adjustably tiltable about a first adjusting axis (S1) relative to a thread axis (A) of the thread (1), wherein a second optical measuring section (5) having a second optical sensor (5a) is arranged at the manipulator (3), wherein the optical measuring sections (5) overall form a measuring channel (4) for simultaneous measurement of opposite sides of the thread (1).