Method of producing tubes and a rolling mill train for producing tubes

A method for producing tubes for use in a heat exchanger comprising:

• providing a first metallic strip and a second metallic strip on a rolling mill train with predetermined breaking points using a device;
• deforming-the first and the second metallic strips to form a tube;
• separating individual tubes from the tube at the predetermined breaking points that have previously been made to coincide;
• sensing positions of the predetermined breaking points in the first metallic strip and the second metallic strip using a sensing element which the first metallic strip and the second metallic strip pass through;
• transmitting signals relating to sensed positions of the predetermined breaking points of the first and the second metallic strips to a computer;
• comparing the sensed positions of the predetermined breaking points in the first and the second metallic strips using the computer on the basis of the signals transmitted;
• and
• sending signals to the device using the computer which lead to aligning the positions of the predetermined breaking points in the first and the second metallic strips,
• wherein sensing positions of the predetermined breaking points includes sensing the predetermined breaking point of the first metallic strip with a first sensing element specified for the first metallic strip and sensing the predetermined breaking point of the second metallic strip with a second sensing element specified for the second metallic strip,
• wherein sensing positions of the predetermined breaking point includes specifying the first sensing element is as a master sensing element and specifying the second sensing element as a slave sensing element, and
• wherein the slave sensing element is a first slave sensing element, wherein sensing positions of the predetermined breaking points includes the master sensing element cooperating with the first slave sensing element and a second slave sensing element via the computer, the second slave sensing element sensing the position of the predetermined breaking points in a third metallic strip.