Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
  • B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
  • B21C37/08—Making tubes with welded or soldered seams
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
  • B21C37/08—Making tubes with welded or soldered seams
  • B21C37/083—Supply, or operations combined with supply, of strip material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
  • B21C37/12—Making tubes or metal hoses with helically arranged seams
  • B21C37/122—Making tubes or metal hoses with helically arranged seams with welded or soldered seams
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
  • B21C37/12—Making tubes or metal hoses with helically arranged seams
  • B21C37/126—Supply, or operations combined with supply, of strip material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
  • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
  • B23K31/027—Making tubes with soldering or welding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K2101/00—Articles made by soldering, welding or cutting
  • B23K2101/04—Tubular or hollow articles
  • B23K2101/06—Tubes

Definitions

• the invention relates to a method for producing welded steel pipes according to claim 1.
• welded tubes are understood to mean both threaded tubes, so-called spiral tubes, and longitudinally welded tubes.
• HFI high frequency induction welded
• ERP electrically resistance welded
• Spiral seam tubes are usually UP-welded, while longitudinally welded tubes can be welded in addition to UP-, HFI- or ERW-welded.
• the laser or laser hybrid welding consisting of a combination of laser and inert gas welding is increasingly used for such pipes.
• the hot strip is formed into a tube in a forming unit of a tube forming machine.
• the deformation unit consists of a 3-roller beam bending system with an outer roller support cage and a so-called offset roller.
• height adjustable offset roller can be compensated for any band edge offset of the slot tube.
• HTS process Helical Seam Two Step
• the pipe diameter is influenced by the entry angle of the belt in the
• Deformation unit and the bandwidth of the input material used can also be influenced on the diameter of the tube.
• Tube molding machine is achieved.
• the spiral-welded pipes are subjected to a water pressure test to check for leaks, then tested for compliance with quality specifications at several stations and then prepared for shipment.
• spiral-welded pipes are still provided with a coating.
• the field of exposed to very high external pressure offshore pipelines must because of the ever-increasing demands, eg. B. to the
• the quality assurance measures are comparable for longitudinal or spiral seam welded pipes.
• the material parameters of the starting material ie the strip or sheet material, are usually random samples by destructive testing methods, such.
• geometric values length, width, thickness
• the manufacturing parameters such.
• the mechanical material properties or the residual stress state can vary over the width and length thereof due to different cooling conditions during rolling of the strips and sheets. If the strip or sheet properties are known, the process parameters can be set accordingly.
• a complete characterization of the material properties by determining the mechanical properties, toughness, residual stress state, structure and texture over the length and width of the strip or sheet and the molded tubes via a
• Bandeinformung can be characterized to a slotted tube.
• the object of the invention is therefore to provide a method for producing welded steel tubes, with the material properties of the base material (strip / sheet) simple and inexpensive nationwide (over the entire sheet or strip area) characterized and with the determined parameters for control or regulation of the process parameters can be used.
• Material properties is derived and when exceeding predetermined limits for the measured value deviations, the process parameters are adjusted and / or the strip / sheet is subjected to a homogenization process prior to molding.
• the measured values can also be used to automatically control or even to process the process parameters of the subsequent process steps with smaller variations regulate.
• the individual measured values give integral characteristic values for the
• measurements of the length and width of the strip / sheet are made continuously or discontinuously (eg raster-like or oscillating) according to the invention, and from the variance of the determined measured values (measured quantities) a measure of the homogeneity of the material properties derived.
• ultrasonic modes can also be used. If, for example, a longitudinal and two transverse modes are used, then by relating the measured values of the transit times to one another, further wall thickness-independent quantities suitable for characterizing the material properties can be determined.
• Ratio or the relative difference then derive a value for the integral index of the sheet or strip properties at the respective measuring point of the test specimen.
• any variation of the integral characteristic is essentially based on the variation of the residual stress. The higher the ratio, the higher it is
• the ultrasound excited electromagnetically introduced into the test piece so that it can be dispensed with a coupling agent.
• the results of the non-destructive testing can be used not only to adapt or optimize the process parameters in pipe production, but also to the production parameters, such as rolling and cooling parameters in the sheet metal and
• this test method for characterizing the homogeneity of material properties are not limited to the examination of the starting material for pipe production but are likewise advantageously suitable for characterizing the homogeneity of the material properties of the pipes in the individual production stages.
• Figures 1 to 3 show some examples of ultrasonically scanned across length and width surfaces of sheets. Shown are the results of Runtime measurements of the ultrasonic signals, the numbers in the scale next to the figures, the relative differences of the transit times (difference by the sum of maturities) in percent for the different polarization directions in different
• the measured relative transit times of the ultrasonic signals have a good symmetry both in the lengthwise direction and in the widthwise direction of the sheet, so that approximately homogeneously distributed material properties are present with respect to the symmetry axes. Since the value specifications for the propagation time differences between the two polarization directions are relatively low, there is a total of a metal sheet with a homogeneous distribution of properties with respect to the symmetry axes.
• FIG. 2 shows, as an example, a metal sheet which has a fairly symmetrical distribution of properties over the sheet width, however, because of the high relative differences in the ultrasonic propagation times with relatively high property variations, which in the case of FIG
• Blecheinformung are taken into account. Because of the good symmetry can be responded to but usually good.
• FIG. 1 A sheet with a clear asymmetry of the properties across the sheet width is shown in FIG. A tube made of this sheet showed a significant ovality after the forming and welding without adjusting the process parameters.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
• Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (6)

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Family Cites Families (12)

• 2012
  • 2012-03-22 DE DE102012006472A patent/DE102012006472B4/de not_active Expired - Fee Related
• 2013
  • 2013-02-27 WO PCT/DE2013/000130 patent/WO2013139321A1/de active Application Filing
  • 2013-02-27 EP EP13717420.7A patent/EP2828014A1/de not_active Withdrawn
  • 2013-02-27 JP JP2015500768A patent/JP2015513371A/ja not_active Withdrawn
  • 2013-02-27 CA CA2868151A patent/CA2868151A1/en not_active Abandoned
  • 2013-02-27 US US14/386,467 patent/US9221127B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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