Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • 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
  • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
  • B21C37/09—Making tubes with welded or soldered seams of coated strip material ; Making multi-wall tubes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • 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
  • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
  • B21C37/15—Making tubes of special shape; Making tube fittings
  • B21C37/154—Making multi-wall tubes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
  • B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
  • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
• • 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
  • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
  • B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
• • 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 both to a method for applying a
• Inner shell surface of the tubular body is connected to the tubular body, as well as a welding device for welding a curved plate, in particular an inner sleeve on the
• From DE 18 04 55 A is a device for
• CLAD pipes For the transport of corrosive or abrasive media in a pipeline already plated steel pipes, so-called CLAD pipes are used, the inside of a metallic coating of a corrosion and / or wear-inhibiting metallic material, eg. B. Auso and consist of standard steels outside.
• Inner circumferential surface of a tube made of a conventional C-steel (black material) can be applied.
• the bearing pipe portion 5 can therefore be made of a relatively cheaper material, as the coating.
• a method for the production of CLAD tubes is known in which initially two sheets are joined together, namely on one side a sheet of black material and on the other side a sheet of white material as stainless material. The two sheets are spot welded together, then in the following Operation to roll the sheet to a tube.
• Such a clad material combines the cost advantages of conventional steel with the performance of e.g. As stainless steel in relation to the
• 5 pipes are used as pipelines on large oil and gas fields for the connection of offshore platforms to the mainland or as
• i o correspond.
• the permanent connection of the inner coating to the inner circumferential surface of the outer tube must be ensured in this respect.
• the adhesive forces must continue to be such that they are able to withstand the effects of force, such as those laying such pipes z. B. occur on the seabed.
• Explosive plating is not very practicable as a manufacturing process, because it has to be handled with explosives.
• the object underlying the invention is therefore to provide a method for coating the inner circumferential surface of a tubular body with a sheet that reproducible
• the pressure wave is generated by pulsed electromagnetic induction and force5. Specifically, in magnetic pulse welding by means of a capacitor discharge, a high current pulse is generated, which is conducted into a stable magnetic coil. The coil creates a strong magnetic field. The magnetic field induces current into the electrically conductive sheet which generates a magnetic field which is opposite to the magnetic field generated by the coil.
• connection mechanisms are comparable to those of explosion welding or explosive plating.
• the sheet is tubular
• Inner sleeve is formed, wherein advantageously the tubular inner sleeve i o has a longitudinally extending slot.
• the distance of the white material to the black material is just as adjustable that the
• the black material is too low. That is, a certain kinetic energy is needed to ensure welding of the white and black material.
• the tubular body is slotted in the direction of the longitudinal axis.
• the slotting of the inner sleeve and the overlapping of the slots is thereby achieved that the leadership of the cable can be done to the coil through the two slots.
• the welding of the slotted inner sleeve on the inner circumferential surface of the tubular body 30 is now carried out such that the sleeve-shaped sheet has an extension in the direction of the longitudinal axis of the tube, which is at least smaller than the length of the coil used to generate the magnetic pulse.
• the sheet of an electrically conductive material is advantageous
• a driver material is meant a material of high electrical conductivity, ie z. As aluminum. This driver material rests directly on the white material, wherein the current induced by the magnetic field in the driver material of the inner sleeve then provides the required strong magnetic field, which is the
• Driver material rests directly on the coating material, the two materials are not accelerated relative to each other. That is, the driver material can be removed from the sheet after the actual coating process. After coating the
• segmental welding of sheet metal segments or inner sleeves of small axial extent has the further advantage that due to the explosive acceleration of the sheet on the inner circumferential surface 30 of the tubular body to scale layers. On the surfaces flake off and thus a uniform intensive welding
• the invention is also a welding device for
• Welding device characterized in that the coil is formed in the manner of a sword.
• the trained in the manner of a sword coil has a height which corresponds to the diameter of the tubular body to be coated or the diameter of the
• Inner sleeve corresponds.
• the coil itself has only a single turn, and is formed in the manner of a plate, in particular in the manner of a rectangular plate.
• an L-shaped slot is arranged, wherein the long leg of the L in the plate-shaped coil (flat coil) parallel to the longitudinal axis of the plate-shaped,
• Fig. 1 shows schematically a slotted tubular body of black material, wherein in the tubular body is a slotted sleeve of white material;
• FIG. 1 a shows an enlarged detail of FIG. 1;
• Fig. 2 shows a representation according to FIG. 1 a, wherein the white
• Material of the inner sleeve with a driver material eg. B.
• Fig. 3 shows the type of connection between the tubular
• Fig. 4 shows schematically the trained as a sword coil.
• the tubular body is denoted by 1.
• the tubular body has a slot 2, wherein in the slotted tubular body 1, a slotted inner sleeve 10 is inserted, which is formed from the coating material.
• the inner sleeve is as
• Formed sleeve segment and has a length corresponding to the length of the formed as a sword coil.
• the slot of the inner sleeve is denoted by 12.
• the tubular body may have a length of up to 12 m.
• the diameters of such CLAD tubes can be up to 500 mm.
• the coil represented schematically by 20 can also be seen.
• the coil is located immediately above the white material, due to the slotted inner sleeve, the distance X ( Figure 1 a) between the inner circumferential surface of the tubular body on the one hand and the outer lateral surface of the slotted sleeve on the other hand is adjustable.o
• the distance X is here the acceleration distance, which is required for the sheet metal of the inner sleeve with the required Impact speed on the tubular body of black material impinges, so ultimately can develop the required kinetic energy.
• the connection of the inner sleeve or a curved plate with the tubular body takes place in sections on the inner wall of the tubular body circumferentially.
• Driver material with a better electrical conductivity is used. This means that, for example, the inner sleeve or the curved plate is provided on the inside with an aluminum layer.
• Aluminum layer is directly on the white material, that is, the coating material, wherein the positive force acting on the driver material is transferred directly to the white material by the positive connection between the white material and the driver material.
• the driver material for example a coating of aluminum is designated 15.
• the sword 20 has a in a rectangular plate of i o electrically conductive material, for. As copper, arranged L-shaped slot 21, wherein the long leg 21 a of the slot is parallel to the longitudinal axis of the sword. This creates a coil with one turn.
• the length of the sword can be about 1, 0 m to 1, 5 m; the thickness of the sword amounts to max. about 10 mm.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Pressure Welding/Diffusion-Bonding (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (2)

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Citations (9)

• 2012
  • 2012-05-04 DE DE102012008740A patent/DE102012008740A1/de not_active Withdrawn
• 2013
  • 2013-04-11 WO PCT/DE2013/000186 patent/WO2013163972A1/fr not_active Ceased

Patent Citations (9)

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