Patent ID: 8667686

Claim:
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 aligning the positions of the predetermined breaking points takes place in such a manner that the time of corresponding start signals is regulated to “earlier” or “later” at the device for introducing the predetermined breaking points, which is assigned to the slave sensing element, until the positions of the breaking points are aligned with one another.