# US 2011/0031296 A1 · Method of producing tubes and a rolling mill train for producing tubes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2011/0031296 A1 - Document ID: US20110031296A1 - Status: Published application - Kind: A1 - Application number: 12/851,146 - Filed: 2010-08-05 - Published: 2011-02-10 - Earliest claimed: 2009-08-06 - Assignees: Modine Manufacturing Company - Inventors: Werner Zobel - Web page: https://patentgrep.com/patent/US20110031296A1 ## CPC - B21C 37/154: {Making multi-wall tubes} - B21C 37/157: {Perforations} - B21C 37/225: {longitudinally-ribbed tubes} - B23D 23/00: Machines or devices for shearing or cutting profiled stock (hand-held devices B23D29/00) - B23D 33/003: {for obtaining pieces of a predetermined weight or volume, e.g. control arrangements (B23D36/0025 takes precedence)} - B23D 36/005: {and taking account of marks, e.g. on the stock} - B23D 25/12: Shearing machines with blades on coacting rotating drums - F28F 1/02: Tubular elements of cross-section which is non-circular (F28F1/08, F28F1/10 take precedence) - F28F 3/025: {the means being corrugated, plate-like elements} - Y10T 29/49391: Tube making or reforming - B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL - B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A method for producing tubes for use in a heat exchanger that includes providing first and second metallic strips on a rolling mill train with predetermined breaking points using a device, deforming the strips to form the a tube, separating individual tubes from the tube at the predetermined breaking points, sensing positions of the predetermined breaking points in the strips using a sensing element which the strips pass through, transmitting signals relating to sensed positions of the predetermined breaking points of the strips to a computer, comparing the positions of the predetermined breaking points in the first and the second strips using the computer on the basis of the signals transmitted, and sending signals to the device using the computer which lead to the alignment of the positions of the predetermined breaking points in the first and the second strips. ## Claims ### Claim at position 1 -11. (canceled) ### Claim 12 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. ### Claim 13 (depends on 11) The method of claim 11, 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. ### Claim 14 (depends on 13) The method of claim 13, 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. ### Claim 15 (depends on 14) The method of claim 14, 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. ### Claim 16 (depends on 12) The method of claim 12, further comprising setting the first metallic strip and the second metallic at an identical strip speed. ### Claim 17 (depends on 14) The method of claim 14, 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. ### Claim 18 (depends on 17) The method of claim 17, further comprising comparing and aligning positions of the predetermined breaking points in the first, the second, and the third metallic strips with the positions of the predetermined breaking points of a master sensing element strip, in such a manner that the times of corresponding start signals are regulated to “earlier” or “later” at the device for introducing the predetermined breaking points, which is assigned to a second slave sensing element strip, and a device for introducing the predetermined breaking points which is assigned to a third slave sensing element strip, at least until the positions of the predetermined breaking points in the first, the second, and the third metallic strips coincide. ### Claim 19 (depends on 18) The method of claim 18, further comprising, assigning the master sensing element strip to one of the first, the second and the third metallic strips which is deformed to form an inner insert of the tube. ### Claim 20 A rolling mill train for carrying out a process for producing tubes from a first metallic strip and a second metallic strip, the rolling mill train comprising: pairs of rolls; a device for introducing predetermined breaking points in the first and the second metallic strips; means for making the predetermined breaking points in the first metallic strip and the second metallic strip coincide; at least one sensing element for determining the positions of the predetermined breaking points; and a computer connected to the at least one sensing element and to the device. ### Claim 21 (depends on 20) A rolling mill train according to claim 20, further comprising a first sensing element and a second sensing element, wherein the first sensing element and the first metallic strip are specified as a master and the second sensing element and the second metallic strip are specified as a slave. ### Claim 22 (depends on 21) A rolling mill train according to claims 21, wherein the device receives pulses from the computer relating to a triggering time for producing the predetermined breaking points in the second metallic strip depending on the position of the predetermined breaking points in the first metallic strip.