WO2024042973A1 - 成形装置、溶接管の製造装置、管の成形方法および溶接管の製造方法 - Google Patents

成形装置、溶接管の製造装置、管の成形方法および溶接管の製造方法 Download PDF

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Publication number
WO2024042973A1
WO2024042973A1 PCT/JP2023/027347 JP2023027347W WO2024042973A1 WO 2024042973 A1 WO2024042973 A1 WO 2024042973A1 JP 2023027347 W JP2023027347 W JP 2023027347W WO 2024042973 A1 WO2024042973 A1 WO 2024042973A1
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WO
WIPO (PCT)
Prior art keywords
metal plate
band
side wall
end surface
shaped metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/027347
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English (en)
French (fr)
Japanese (ja)
Inventor
拓也 齋藤
洋次 尾中
省吾 菊池
尭広 高橋
武士 物種
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2024542683A priority Critical patent/JPWO2024042973A1/ja
Priority to CN202380059931.6A priority patent/CN119744207A/zh
Publication of WO2024042973A1 publication Critical patent/WO2024042973A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • 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
    • B21D51/00—Making hollow objects
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
    • B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams

Definitions

  • the present disclosure relates to a forming device, a welded pipe manufacturing device, a pipe forming method, and a welded pipe manufacturing method.
  • a welded pipe is made by bending a band-shaped metal plate into a tubular shape in the width direction, and welding both ends of the metal plate together in the width direction.
  • an apparatus has been developed that bends a band-shaped metal plate into a tubular shape in the width direction.
  • Patent Document 1 has an upper roll and a lower roll that curve a band-shaped metal plate in the width direction, and two split dies with arc-shaped grooves facing each other in cross section, and the opposing grooves of the split dies
  • An apparatus for manufacturing a welded pipe which includes a tube forming section that feeds a band-shaped metal plate curved in the width direction into a space formed by the metal plate and forms the fed band-shaped metal plate into a tubular metal plate.
  • the split mold is arranged at a position where the grooves are separated from each other on the side where the strip metal plate is fed, and the grooves are close to each other on the side where the strip metal plate is fed out.
  • the distance between the grooves becomes narrower toward the side from which the band-shaped metal plate is sent out.
  • the band-shaped metal plate is rolled up in the width direction as it goes toward the side from which it is fed out, and is formed into a tubular metal plate.
  • each of the split molds is rotatable around its respective axis in order to form the above-mentioned interval between the grooves.
  • the relative positions of the split molds are adjusted, and as a result, the spacing between the grooves is adjusted to a desired size.
  • the present disclosure has been made to solve the above-mentioned problems, and includes a forming device capable of forming a band-shaped metal plate into a tube-shaped metal plate without complicated positional adjustment between parts, a welded tube manufacturing device, and a tube-shaped forming device capable of forming a welded tube manufacturing device.
  • the object of the present invention is to provide a forming method and a welded pipe manufacturing method.
  • a forming apparatus includes a tube forming part having a through hole whose diameter decreases from the inlet to the outlet, and a first side wall and a second side wall protruding from the inner wall of the through hole. and an end face molded part having a protrusion in which the first side wall and the second side wall extend in a direction from the inlet to the outlet, and the width from the first side wall to the second side wall decreases from the inlet to the outlet.
  • the tube-forming part is formed by feeding the band-shaped metal plate curved in the width direction from the entrance of the through hole, so that the first end face and the second end face in the width direction of the band-shaped metal plate are directed from the inlet to the exit.
  • the band-shaped metal plate is formed into a tubular metal plate with a first end face and a second end face facing each other.
  • the end face forming part is configured such that the first side wall and the second side wall are formed by feeding the band metal plate from the inlet with the protrusion inserted between the first end face and the second end face of the band metal plate.
  • the first end surface and the second end surface are formed into the shapes of the first side wall and the second side wall so that the first end surface and the second end surface face each other.
  • the forming apparatus only includes the above-described tube forming section and an end surface forming section having a protrusion provided in a through hole of the tube forming section. Therefore, the forming apparatus can form a band-shaped metal plate into a tubular metal plate without making complicated positional adjustments between parts.
  • a side view of the first half of the welded pipe manufacturing apparatus according to Embodiment 1 of the present disclosure A side view of the latter half of the welded pipe manufacturing apparatus according to Embodiment 1 of the present disclosure
  • a perspective view of a forming device included in a welded pipe manufacturing apparatus according to Embodiment 1 of the present disclosure A cross-sectional view of an edge roll included in a forming device included in a welded pipe manufacturing device according to Embodiment 1 of the present disclosure.
  • FIG. 8 A cross-sectional view of a band-shaped metal plate curved by side rolls included in a forming device included in a welded pipe manufacturing device according to Embodiment 1 of the present disclosure.
  • a top view of a forming device included in a welded pipe manufacturing device according to Embodiment 2 of the present disclosure A perspective view of a forming device included in a welded pipe manufacturing device according to Embodiment 2 of the present disclosure
  • the welded pipe manufacturing apparatus curves a band-shaped metal plate as a material into a tubular shape in the width direction, aligns both ends in the width direction, and then welds the seam where the two ends are brought together to produce a welded pipe.
  • This is a manufacturing equipment for manufacturing.
  • This manufacturing equipment uses a roll device to curve a band-shaped metal plate in the width direction, and then uses a tube forming member called a shoe guide to further curve the band-shaped metal plate so that both ends of the band-shaped metal plate face each other in the width direction. Form into a tubular metal plate.
  • This manufacturing apparatus will be described below, taking as an example a case where the welded tube to be manufactured is a heat exchanger tube used in a heat exchanger. First, the overall configuration of a welded pipe manufacturing apparatus will be described with reference to FIGS. 1 and 2.
  • FIG. 1 is a side view of the first half of the welded pipe manufacturing apparatus 1 according to the first embodiment.
  • FIG. 2 is a side view of the latter half of the manufacturing apparatus 1.
  • the welded pipe manufacturing apparatus 1 includes an uncoiler 10, a connecting machine 11, an accumulator 12, stamping machines 13 and 14, a forming machine 15A, a welding machine 16A, a drawing machine 17, and a cutting machine 18. and a recoiler 19.
  • a belt-shaped metal plate wound into a coil is supplied to the welded pipe manufacturing apparatus 1.
  • the manufacturing apparatus 1 then manufactures a welded pipe from the band-shaped metal plate.
  • the uncoiler 10 shown in FIG. 1 unwinds the coil around which the band-shaped metal plate is wound, and pulls out one end side of the band-shaped metal plate from the coil.
  • the uncoiler 10 includes a cylindrical holder 111 that holds a coil of a band-shaped metal plate from the inside, and a drive unit (not shown) that rotates the holder 111.
  • a drive unit (not shown) rotates the holder 111 in a direction opposite to the coil winding direction. Thereby, the uncoiler 10 pulls out one end side of the band-shaped metal plate from the coil.
  • the uncoiler 10 supplies one end of the pulled out strip-shaped metal plate to the connecting machine 11 .
  • the connector 11 connects the other end of the strip-shaped metal plate and one end of another strip-shaped metal plate. Specifically, although not shown in the drawings, in the uncoiler 10, when the strip metal plate is completely pulled out from the coil, the next coil is set, and one end side of the strip metal plate is pulled out from the next coil.
  • the connecting device 11 connects the other end of the previous coil on the opposite side to one end of the strip-shaped metal plate and one end of the pulled-out strip-shaped metal plate of the next coil.
  • the connecting machine 11 has a welding machine (not shown).
  • the connecting machine 11 uses its welding machine to weld the other end of the band-shaped metal plate of the previous coil to one end of the band-shaped metal plate of the next coil.
  • the connecting device 11 is also referred to as a strip joining.
  • the accumulator 12 stores a certain length of the band-shaped metal plate pulled out from the coil.
  • the accumulator 12 includes a roller (not shown). On the roller is hung the middle part of the strip-shaped metal plate drawn out from the coil.
  • the roller should be used to feed the intermediate portion of the strip metal plate during the welding time of the splicing machine 11. Roll it up to a certain length.
  • the accumulator 12 retains the band-shaped metal plate for a certain length. After the accumulator 12 winds up the middle part of the band-shaped metal plate by a certain length, the one end side part of the band-shaped metal plate, that is, the +X end part in the orthogonal coordinate system XYZ shown in FIG. send to.
  • the stamping machines 13 and 14 are used to form grooves on the inner wall of the welded tube to be manufactured, specifically, to form grooves on the inner wall to improve heat exchange performance when the welded tube is used as a heat transfer tube. , is a device for forming grooves in a band-shaped metal plate.
  • the engraving machines 13 and 14 include a first roll called a groove roll or a G roll with grooves formed on the outer periphery, and a first roll with grooves formed on the outer periphery without unevenness on the outer periphery. and a second roll having a smooth curved surface. Then, the engraving machine 13 inserts the band-shaped metal plate sent from the accumulator 12 and whose tension has been adjusted by the dancer rolls 131 and 132 shown in FIG. 1 between the first roll and the second roll described above. The stamping machine 13 passes the belt-shaped metal plate between the first roll and the second roll in a state where the first roll and the second roll are pressed against the belt-shaped metal plate. Thereby, the engraving machine 13 forms a groove on the band-shaped metal plate.
  • a first roll called a groove roll or a G roll with grooves formed on the outer periphery
  • a second roll having a smooth
  • the engraving machine 14 has a third roll in which grooves of a different shape from the grooves of the first roll are formed on the outer periphery, and a curved surface with a smooth outer periphery without any unevenness on the outer periphery. and a fourth roll.
  • the stamping machine 14 sandwiches the band-shaped metal plate, on which grooves have been formed by the stamping machine 13 and whose tension has been adjusted by dancer rolls 132 and 133, between the third roll and the fourth roll. Further, the stamping machine 14 presses the third roll and the fourth roll against the band-shaped metal plate. Furthermore, the stamping machine 14 passes the band-shaped metal plate between the third roll and the fourth roll. As a result, the stamping machine 14 forms a groove different from that in the case of the stamping machine 13 on the band-shaped metal plate.
  • the engraving machines 13 and 14 perform the above-mentioned processing on the metal strip, thereby forming, for example, a herringbone-shaped groove in which a plurality of V-shaped grooves are arranged in the extending direction of the metal strip. Form into a board. Alternatively, the engraving machines 13 and 14 form a plurality of X-shaped intersecting grooves on the band-shaped metal plate. Alternatively, the engraving machines 13 and 14 form embossing on the band-shaped metal plate.
  • the stamping machines 13 and 14 improve the heat exchange efficiency of the manufactured welded tube when it is used as a heat exchanger tube of a heat exchanger by forming such grooves in the band-shaped metal plate. After the stamping machines 13 and 14 form such grooves on the band-shaped metal plate, they send out the portion in which the grooves have been formed to a forming device 15A shown in FIG. 2.
  • the forming device 15A first bends the band-shaped metal plate sent from the engraving machines 13 and 14 in the width direction of the band, and then further curves the band-shaped metal plate. Thereby, the forming device 15A forms the band-shaped metal plate into a tube shape with both ends in the width direction, that is, the +Y end and the -Y end. For example, the molding device 15A molds into a circular tube shape. As a result, the forming device 15A forms a tubular body whose Y ends are aligned on the portion of the band-shaped metal plate sent from the engraving machines 13 and 14. The forming device 15A sends the tubular body to the welding machine 16A. Note that the detailed configuration of the molding device 15A will be described later.
  • the welding machine 16A welds the seam of the tubular body described above.
  • the welding machine 16A is equipped with, for example, a high-frequency induction heating type or TIG (Tungsten Insert Gas) type welding device, and uses the welding device to weld the seam of the tubular body and weld it to the +X end side of the band-shaped metal plate. Create the pipe part. Then, the welding machine 16A sends the welded pipe portion of the band-shaped metal plate to the drawing machine 17.
  • TIG Tin Insert Gas
  • the drawing machine 17 adjusts the size of the outer diameter and inner diameter of the welded pipe portion produced by the welding machine 16A.
  • the drawing machine 17 includes a die provided with a through hole that is smaller than the outer diameter of the welded pipe produced by the welding machine 16A and has the same diameter as the target outer diameter. Then, the drawing machine 17 passes the welded pipe portion of the band-shaped metal plate through the die and pulls out the welded pipe portion from the die. Thereby, the drawing machine 17 processes the welded pipe portion of the band-shaped metal plate to have the same outer diameter as the diameter of the through hole of the die.
  • the drawing machine 17 is equipped with a plurality of sets of rolls facing vertically or horizontally instead of the above-mentioned dies.
  • the plurality of rolls are arranged in a line in the front-rear direction, that is, in the X direction in FIG.
  • a groove having a semicircular cross section is formed along the circumferential direction on the cylindrical surface of each roll. In each set of rolls, by arranging the grooves to face each other, a circular space is formed between the rolls in a side view. These circular spaces become smaller toward the +X direction.
  • the welded pipe portion of the band-shaped metal plate is passed between the plurality of sets of rolls, so that the welded pipe portion of the band-shaped metal plate is inserted into the circular space between the rolls. Machining to the same outer diameter as the smallest circular space.
  • the drawing machine 17 sends the welded pipe portion of the band-shaped metal plate processed by such dies or rolls to the cutting machine 18 shown in FIG. 2.
  • the cutting machine 18 includes a cutter 181 that is movable from the front to the back in FIG. 2, that is, in the Y direction. Then, the cutting machine 18 moves the cutter 181 to cut the welded pipe portion of the band-shaped metal plate processed by the drawing machine 17 to a desired length. Thereby, the cutting machine 18 produces a welded pipe of a desired length. Then, the cutting machine 18 sends the welded pipe made to the desired length to the recoiler 19.
  • the recoiler 19 has a cylindrical winding section 191, and the welded tube cut to a desired length by the cutting machine 18 is wound up into the winding section 191 and re-coiled. Thereby, the recoiler 19 puts the produced welded pipe into a state where it can be supplied to an external device.
  • the coiled band-shaped metal plate attached to the uncoiler 10 is, for example, a rolled copper or copper alloy plate.
  • the heat treatment is preferably O material, 1/2H material, or 1/4H material compliant with JIS H3100.
  • the width of the band-shaped metal plate is preferably a size corresponding to the outer diameter of the welded pipe before being reduced in diameter by the drawing machine 17. For example, if the outer diameter of the welded pipe before being reduced by the drawing machine 17 is 7 mm, the width of the band-shaped metal plate is 22.5 mm, which is the circumference calculated from the outer diameter plus 0.5 mm for welding. It is.
  • the thickness of the band-shaped metal plate is reduced by 0.05 mm by the engraving machine 14, it is preferable that the thickness of the band-shaped metal plate is 0.05 mm thicker than the thickness of the welded pipe before being reduced in diameter by the drawing machine 17.
  • the uncoiler 10 pulls out the band-shaped metal plate wound into a coiled shape, and the stamping machines 13 and 14 form grooves in the band-shaped metal plate. Further, the forming device 15A bends the band-shaped metal plate in the Y direction to form a tubular body in which the +Y end and the -Y end are joined. Then, the welding machine 16A welds the seam formed by joining the +Y end and the -Y end of the tubular body to produce a welded pipe.
  • a device equipped with breakdown rolls and fin pass rolls may be used as the forming device 15A.
  • the total number of rolls is large, including the number of breakdown rolls and fin pass rolls.
  • the forming device 15A becomes longer in the direction in which the strip metal plate is sent out, and as a result, the forming device 15A becomes larger.
  • a breakdown roll and a fin pass roll are shown in FIGS. 3A to 3C, 4A, and 4B.
  • FIGS. 3A to 3C are cross-sectional views of the breakdown rolls 151-156 and the band-shaped metal plate 2 to be formed when the forming apparatus 150 has the breakdown rolls 151-156.
  • 4A and 4B are cross-sectional views of the band-shaped metal sheet 2 to be formed with the fin pass rolls 157-160 when the forming apparatus 150 has the fin pass rolls 157-160.
  • the breakdown rolls 151 to 156 are rolls that roughly form the band-shaped metal plate 2 into an arcuate cross-sectional shape between a pair of rolls.
  • the breakdown rolls 151-156 are arranged in the order of breakdown rolls 151 and 152, 153 and 154, and 155 and 156 from the upstream side, that is, from the -X side.
  • a breakdown roll 151 having a convex portion 161 that protrudes downward, that is, protruding toward the ⁇ Z side, and a breakdown roll 152 having a concave portion 162 concave toward the ⁇ Z side are They form a pair in the direction.
  • a breakdown roll 153 having a protrusion 163 protruding toward the -Z side and a breakdown roll 154 having a recess 164 concave toward the -Z side form a pair in the Z direction.
  • a breakdown roll 155 having a protrusion 165 protruding toward the -Z side and a breakdown roll 156 having a recess 166 concave toward the -Z side form a pair in the Z direction.
  • the heights of the convex portions 161, 163, and 165 in the Z direction increase in the order of the convex portions 161, 163, and 165 toward the downstream side, that is, the +X side.
  • the widths of the protrusions 161, 163, and 165 in the Y direction become narrower in this order.
  • the depths of the recesses 162, 164, and 166 in the Z direction become deeper in the order of the recesses 162, 164, and 166, and the widths of the recesses 162, 164, and 166 in the Y direction become narrower in this order.
  • the YZ cross-sectional shapes of the recesses 162, 164, and 166 become increasingly curved in this order, approaching a circular arc shape.
  • the breakdown rolls 151-156 are composed of a large number of rolls in order to curve the band-shaped metal plate 2 more toward the +X side.
  • the fin pass rolls 157-160 are constructed by passing a band-shaped metal plate 2 roughly formed into an arcuate shape in cross-section between a pair of rolls. This is a roll that finalizes and forms the material into a circular shape when viewed in YZ cross section.
  • the fin pass rolls 157-160 are arranged in the order of fin pass rolls 157 and 158, and 159 and 160 from the -X side.
  • the fin pass roll 157 has a recess that is recessed in an arc shape in cross section toward the +Z side, and a fin portion 167 that protrudes from the recess in a triangular shape in cross section toward the ⁇ Z side;
  • a fin pass roll 158 having a concave recess forms a pair in the Z direction.
  • a fin pass roll 159 having a recess similar to that of the fin pass roll 157 and a triangular fin part 169 that is smaller than the fin part 167 of the fin pass roll 157 in the recess, and a fin pass roll 159 similar to the fin pass roll 158 are provided.
  • the fin pass roll 160 having a recess forms the Z direction.
  • the width in the Y direction and the height in the Z direction of the fin parts 167 and 169 become smaller in the order of the fin parts 167 and 169. In other words, they become smaller in the order in which they are arranged toward the +X side.
  • the recesses of the fin pass rolls 157 and 159 and the recesses of the fin pass rolls 158 and 160 are opposed to each other in the Z direction and form a circular space when viewed in cross section.
  • the fin pass rolls 157-160 finish the band-shaped metal plate 2 into a circular shape in a YZ cross-sectional view, in which the +Y end and the -Y end of the band-shaped metal plate 2 approach as they move toward the +X side. Shape.
  • the fin pass rolls 157-160 are also composed of a large number of rolls in order to gradually curve the band-shaped metal plate 2.
  • the forming apparatus 150 including the breakdown rolls 151-156 and the fin pass rolls 157-160 is used as the forming apparatus 15A, a large number of rolls are arranged in the direction in which the strip metal plate 2 is sent out. As a result, the entire device becomes longer in the direction in which the strip metal plate 2 is sent out.
  • the stamping machine 13, 14 may be crushed. As a result, the heat exchange performance of the produced welded pipe may deteriorate.
  • the welded pipe manufacturing apparatus 1 in order to reduce the size of the apparatus, simplify the apparatus configuration, and maintain the shape of the groove formed in the band-shaped metal plate 2, the welded pipe manufacturing apparatus 1 has a through hole through which the band-shaped metal plate 2 passes.
  • the forming device 15A includes a tube forming member called a shoe guide that forms the band-shaped metal plate 2 into a tube shape using the inner wall of the through hole. Next, the configuration of the molding device 15A will be described with reference to FIGS. 5-9, 10A, and 10B.
  • FIG. 5 is a perspective view of a forming device 15A included in the welded pipe manufacturing apparatus 1 according to the first embodiment.
  • FIG. 6 is a sectional view of the edge rolls 20 and 21 included in the forming apparatus 15A.
  • FIG. 7 is a sectional view of the side rolls 30 and 31 included in the forming apparatus 15A.
  • FIG. 8 is a perspective view of the tube forming member 40 included in the forming apparatus 15A.
  • FIG. 9 is an enlarged view of the IX area shown in FIG. 8.
  • FIG. 10A is a cross-sectional view of the band-shaped metal plate 2 curved by the side rolls 30 and 31.
  • FIG. 10B is a cross-sectional view of the tube 3 formed by the tube forming member 40.
  • FIG. 5 shows a conceptualized molding device 15A with details omitted. Moreover, in FIG. 8, the band-shaped metal plate 2 to be processed is omitted.
  • the forming device 15A includes edge rolls 20 and 21 that curve the edge portions of the strip metal plate 2 in the width direction, and the strip metal plate 2 curved in the width direction by the edge rolls 20 and 21.
  • Side rolls 30, 31 that press the band-shaped metal plate 2 from the sides, that is, from the side direction to further curve it; and a tube forming member 40 that forms the band-shaped metal plate 2 curved by the side rolls 30, 31 into a tube shape. Equipped with
  • the edge rolls 20 and 21 are formed by sandwiching the band-shaped metal plate 2, so both have a cylindrical shape. Their outer diameters are the same.
  • the edge rolls 20 and 21 are arranged in the vertical direction, that is, the Z direction, with the pillar axes D1 and D2 oriented in the left-right direction, that is, the Y direction.
  • the edge rolls 20 and 21 have a gap between them in the Z direction in order to form the band-shaped metal plate 2.
  • the band-shaped metal plate 2 is passed through the gap.
  • the edge roll 20 curves the width direction end portion, that is, the Y direction end portion, of the band-shaped metal plate 2, in a cross-sectional view when cut along the column axis D1.
  • the corner portions at both ends of the cylinder are rounded into arc shapes.
  • the length of the edge roll 20 along the outer shape from the -Y end to the +Y end is the same as the width of the band-shaped metal plate 2, or longer. big.
  • the width of the edge roll 21 in the direction of the column axis D2, that is, the width in the Y direction, is larger than the width of the band-shaped metal plate 2 because the band-shaped metal plate 2 is formed between the edge roll 21 and the edge roll 20.
  • the edge roll 20 has a concave portion 22 recessed in the outer peripheral shape in a cross-sectional view.
  • the recessed portion 22 has both ends rounded into an arc shape in the above cross-sectional view, and the bottom portion is formed in a flat shape.
  • the recess 22 extends along the outer periphery of the edge roll 20 while maintaining its cross-sectional shape. Thereby, the recess 22 is formed over the entire outer periphery of the edge roll 20.
  • the recess 22 is recessed in a shape similar to the outer peripheral shape of the edge roll 20 in the above-mentioned cross-sectional view.
  • the recess 22 faces the edge roll 20 in the Z direction, and the inner wall of the recess 22 and the outer circumference of the edge roll 20 are separated by a certain distance.
  • the recess 22 is provided with a gap 23 between the edge roll 20 and the gap 23 having a straight central portion and arcuately curved end portions in the cross-sectional view described above.
  • a band-shaped metal plate 2 with its width direction directed in the Y direction is passed through the gap 23.
  • the edge rolls 20 and 21 are rotated around the columnar axes D1 and D2 by a drive device (not shown), such as a motor. More specifically, the edge roll 20 rotates counterclockwise when viewed from the +Y side shown in FIG. The edge roll 21 rotates clockwise when viewed from the +Y side in the figure. As a result, the edge rolls 20 and 21 curve both ends in the width direction of the band-shaped metal plate 2 passed through the gap 23 between them into an arc shape when viewed in cross section. In other words, the edge rolls 20 and 21 curve the band-shaped metal plate 2 into a dish shape.
  • edge rolls 20 and 21 Furthermore, by rotating, the edge rolls 20 and 21 send the curved band-shaped metal plate 2 downstream, that is, in the +X direction, as shown in FIG. Side rolls 30 and 31 are provided on the +X side of the edge rolls 20 and 21, and the band-shaped metal plate 2 curved by the edge rolls 20 and 21 is sent to the side rolls 30 and 31.
  • the side rolls 30 and 31 are formed into disc shapes having the same diameter.
  • the side rolls 30 and 31 are arranged in the Y direction with the disc axes D3 and D4 facing the Z direction.
  • a band-shaped metal plate 2 curved in the width direction by the edge rolls 20 and 21 is passed between the side rolls 30 and 31 in the Y direction.
  • the disk end surfaces of the side rolls 30 and 31 are in contact with the curved widthwise ends of the band-shaped metal plate 2, respectively.
  • the disk end faces of the side rolls 30 and 31 are formed with concave portions 32 and 33 that are concave in an arc shape when viewed in cross section when cut in the radial direction.
  • the recesses 32 and 33 face each other with a certain distance apart.
  • a gap 34 is formed between the recesses 32 and 33, as shown in FIG. 6, and the maximum width W2 is smaller than the width W1 of the band-shaped metal plate 2 curved by the edge rolls 20 and 21.
  • the curved band-shaped metal plate 2 is passed through the gap 34, as shown in FIG.
  • the side rolls 30 and 31 are rotated around disk shafts D3 and D4 by a drive device (not shown), for example, a motor. More specifically, the side roll 30 rotates clockwise when viewed from the +Z side shown in FIG. Further, the side roll 31 rotates counterclockwise when viewed from the +Z side in the figure. Thereby, the side rolls 30 and 31 further curve the curved band-shaped metal plate 2 passed through the gap 34. Specifically, the maximum width W2 of the gap 34 is smaller than that of the curved band-shaped metal plate 2. Therefore, the widthwise end portions of the band-shaped metal plate 2 are pressed against the inner walls of the recesses 32 and 33 of the side rolls 30 and 31, each having an arcuate cross-sectional view.
  • a drive device not shown
  • the side roll 30 rotates clockwise when viewed from the +Z side shown in FIG.
  • the side roll 31 rotates counterclockwise when viewed from the +Z side in the figure.
  • the side rolls 30 and 31 further curve the curved band-shaped metal plate 2 passed
  • the side rolls 30 and 31 curve each of the widthwise end portions of the band-shaped metal plate 2 further than the shape shown in FIG. 6, and deform it into an arc shape in cross-sectional view. Thereby, the side rolls 30 and 31 deform the band-shaped metal plate 2 into a curved state larger than a semicircle.
  • the side rolls 30 and 31 send the curved band-shaped metal plate 2 in the +X direction, as shown in FIG.
  • a tube forming member 40 is provided on the +X side of the side rolls 30 and 31, and the band-shaped metal plate 2 is sent to the tube forming member 40.
  • the tube forming member 40 is a component that forms the band-shaped metal plate 2 curved in the width direction into a tube shape. As shown in FIG. 8, the tube forming member 40 includes a main body portion 41 that forms the band metal plate 2 into a tube shape, and a body portion 41 that forms the band metal plate 2 into the tube shape. A guide portion 42 that guides the width direction end portion is provided.
  • the main body portion 41 has a rectangular parallelepiped shape, with each surface facing in each of the X, Y, and Z directions.
  • a through hole 43 extending from the -X plane to the +X plane is formed in the -X plane of the main body part 41 in order to pass the band-shaped metal plate 2 therethrough and form the band-shaped metal plate 2 into a tube shape therein.
  • the through hole 43 is a circular hole, and in detail, the through hole 43 has a shape whose diameter decreases as it goes in the +X direction from the opening 431 formed on the ⁇ X plane of the main body portion 41.
  • the band-shaped metal plate 2 is curved more than a semicircle by the side rolls 30 and 31.
  • the opening 431 on the ⁇ X plane of the main body portion 41 is formed to have an inner diameter larger than the outer diameter of the band-shaped metal plate 2.
  • the band-shaped metal plate 2 extending from the side rolls 30 and 31 is inserted into the opening 431. Furthermore, the side rolls 30 and 31 send out the band-shaped metal plate 2, so that the band-shaped metal plate 2 is sent inside from the opening 431 in the +X direction.
  • the opening 432 formed on the +X side of the through hole 43 has a length obtained by adding the rolling length during forming by the tube forming member 40 to the outer circumference length in the width direction of the band-shaped metal plate 2. It is formed to have an inner diameter having a circumferential length. Thereby, the opening 432 is formed to have the same inner diameter as the outer diameter of the tube formed from the band-shaped metal plate 2. As a result, the space surrounded by the inner wall of the through hole 43 gradually becomes narrower from the opening 431 on the -X plane of the main body 41 to the opening 432 on the +X plane of the main body 41.
  • the band-shaped metal plate 2 is fed through the opening 431
  • the diameter of the band-shaped metal plate 2 is reduced by contacting the inner wall of the through-hole 43
  • the end faces of the band-shaped metal plate 2 in the width direction approach each other as they go from the opening 431 to the opening 432.
  • the end surfaces of the band-shaped metal plate 2 in the width direction face each other at the opening 432 with a slight gap left.
  • the strip metal plate 2 is formed into a tube shape with the opening 432.
  • the through-hole 43 forms the band-shaped metal plate 2 into a tubular shape.
  • the main body portion 41 forms the band-shaped metal plate 2 into a tubular shape in a smaller space than the above-mentioned breakdown rolls 151-156 and fin pass rolls 157-160. . Further, unlike the cases of the breakdown rolls 151-156 and fin pass rolls 157-160 described above, the band-shaped metal plate 2 is formed into a tube shape without requiring position adjustment between parts.
  • the guide part 42 in order to fit the guide part 42 into the inner wall of the through hole 43, it extends linearly from the opening 431 on the -X plane of the main body part 41 to the opening 432 on the +X plane, and also extends with respect to the X axis.
  • Parallel grooves 433 are formed.
  • the groove 433 is cut out from the inner wall of the through hole 43 to the +Z surface of the main body portion 41.
  • the YZ cross section of the groove 433 has a trapezoidal shape with the upper side facing the -Z direction.
  • the guide portion 42 includes a support portion 421 having a cross-sectional shape that is the same as the YZ cross-section of the groove 433 .
  • the support portion 421 is fitted into the groove 433 . Thereby, the groove 433 holds the guide portion 42.
  • the guide part 42 is supported by the support part 421, and when the support part 421 is fitted into the groove 433, the guide part 42 extends from the inner wall of the through hole 43 where the groove 433 is located to the inner space of the through hole 43. It includes a protrusion 422 that protrudes to the top.
  • the protrusion 422 is a component that guides the end surface of the strip metal plate 2 in the width direction when the strip metal plate 2 fed from the side rolls 30 and 31 is fed into the through hole 43.
  • the protrusion 422 has a trapezoidal shape with the upper side facing the ⁇ Z direction in a YZ cross-sectional view.
  • the width W3 of the protrusion 422 at the opening 431 on the ⁇ X side of the through hole 43 shown in FIG. It is smaller than the opening width W4 between the end faces 25 and 26 in the width direction.
  • the protrusion 422 can enter between the end surfaces 25 and 26 of the strip metal plate 2 when the strip metal plate 2 curved by the side rolls 30 and 31 is fed into the through hole 43.
  • the protrusion 422 enters between the end surfaces 25 and 26 of the strip metal plate 2 when the strip metal plate 2 is fed into the through hole 43, and defines the positions of the end surfaces 25 and 26.
  • the protrusions 422 guide the end surfaces 25 and 26 of the band-shaped metal plate 2 in a fixed direction when the band-shaped metal plate 2 is fed into the through-hole 43, as shown in FIG. It has side walls 423 and 424 located in the inner circumferential direction.
  • the protrusion 422 has a trapezoidal shape with the upper side facing the ⁇ Z direction in the YZ cross-sectional view.
  • the trapezoidal shape of the protrusion 422 in the YZ cross-sectional view is the shape of the support portion 421 in the YZ cross-sectional view.
  • the protrusion 422 extends linearly in the X direction while having trapezoidal legs 4 and 5 in a YZ cross-sectional view.
  • the protrusion 422 has side walls 423 and 424 shown in FIG. 9 that correspond to the legs 4 and 5 in the YZ cross-sectional view.
  • the inner diameter of the through-hole 43 becomes smaller as it goes in the +X direction. It contacts and reduces its diameter. As a result, the end faces 25 and 26 of the band-shaped metal plate 2 in the width direction become closer to each other in the +X direction.
  • the width W3 at the root portion shown in FIG. 1 becomes smaller toward the +X direction.
  • the width W3 of the protrusion 422 at the opening 432 on the +X side of the through hole 43 is 0 or very small. Further, the angle ⁇ shown in FIG.
  • the rate at which the width W3 of the protrusion 422 decreases as it goes in the +X direction is the same as the rate at which the end surfaces 25 and 26 in the width direction of the band-shaped metal plate 2 get closer together in the +X direction.
  • the protrusion 422 extends from the opening 431 on the -X side of the through hole 43 to just before the opening 432 on the +X side.
  • the wall surface height of the side walls 423, 424 that is, the protrusion length L1 of the side walls 423, 424 from the through hole 43 is determined by the opening 431 on the ⁇ X side of the through hole 43, and the strip metal plate 2 shown in FIG. 10A. or longer than the thickness T of the belt-shaped metal plate 2. As shown in FIG. 8, the protrusion length L1 becomes shorter toward the +X direction. Thereby, when the band-shaped metal plate 2 is fed into the through hole 43, the side walls 423, 424 hit at least the outer peripheral portions of the end surfaces 25, 26 and reduce the side walls 423, 424. As a result, at least the outer peripheral portions of the end surfaces 25 and 26 are shaped and arranged into the shapes of the side walls 423 and 424.
  • the side walls 423 and 424 are oriented in a direction intersecting the inner peripheral direction of the through hole 43. Specifically, it is oriented in a direction perpendicular to the inner peripheral direction of the through hole 43 and extends in the perpendicular direction.
  • the side walls 423 and 424 are formed by forming the end surfaces 25 and 26 of the band-shaped metal plate 2 in the width direction into a V-shape in the YZ cross-sectional view shown by the dotted line in FIG. 10B during the above-mentioned reduction. 26 are formed into shapes facing each other parallel to each other as shown by solid lines in FIG. 10B. If the end surfaces 25 and 26 are formed into a V-shape as shown by the dotted line in FIG.
  • the tube-forming member 40 forms the band-shaped metal plate 2 into a tube shape by allowing the through-hole 43 formed in the main body portion 41 to align the band-shaped metal plate 2 along the inner wall.
  • the tube forming member 40 has a guide portion 42 extending in the +X direction and a protrusion 422 whose width W3 becomes smaller toward the +X direction. 25 and 26 are formed into mutually parallel shapes to suppress welding defects.
  • the main body portion 41 is desirably formed of a material that is softer than the metal material of the band-shaped metal plate 2.
  • the main body portion 41 is desirably made of a metal or resin that is softer than pure copper.
  • the main body portion 41 is desirably formed of monomer cast nylon.
  • the guide portion 42 is desirably made of a material harder than the metal material of the band-shaped metal plate 2.
  • the material of the guide portion 42 is preferably a superalloy such as an iron-based superalloy, a cobalt-based superalloy, a nickel-based superalloy, or a cemented carbide.
  • the material of the guide portion 42 is a resin, for example, monomer cast nylon, it is desirable to coat it with a cemented carbide.
  • the guide portion 42 be formed of a material that has higher compressive strength and wear resistance than the band-shaped metal plate 2.
  • the guide portion 42 has higher compressive strength and wear resistance than the main body portion 41.
  • it is made of a material.
  • only the protrusion 422 of the guide portion 42 may be formed of such a material.
  • at least the protrusion 422 is desirably made of cemented carbide when the band-shaped metal plate 2 is made of pure copper. This is because if such a material is used, at least the protrusion 422 is made of a material that has higher compressive strength and wear resistance than the band-shaped metal plate 2.
  • main body portion 41 and the guide portion 42 may be integrally formed. Moreover, the main body part 41 and the guide part 42 may be mechanically joined by a fastening member such as a bolt or a screw.
  • the main body portion 41 and guide portion 42 described in Embodiment 1 are examples of a tube forming portion and an end surface forming portion in the present disclosure.
  • an opening 431 on the -X side and an opening 432 on the +X side of the through hole 43 formed in the main body 41 are an entrance into which the band-shaped metal plate 2 is fed as referred to in the present disclosure, and an inlet into which the band-shaped metal plate 2 is fed. This is an example of an exit sent out.
  • the side walls 423 and 424 are examples of a first side wall and a second side wall in the present disclosure.
  • the edge rolls 20 and 21 and the side rolls 30 and 31 are examples of a roll device as referred to in the present disclosure.
  • the band-shaped metal plate 2 formed into a tubular shape is an example of a tubular metal plate as referred to in the present disclosure.
  • the main body part 41 provided in the forming apparatus 15A extends from the opening 431 on the -X side of the through hole 43 to the opening 432 on the +X side. It has a through hole 43 whose diameter decreases toward the end. Then, the main body part 41 has the end surfaces 25 and 26 in the width direction of the band-shaped metal plate 2 curved in the width direction by being fed through the opening 431 on the -X side of the through hole 43.
  • the opening 431 on the ⁇ X side of the through hole 43 is made closer to the opening 432 on the +X side, and the strip metal plate 2 is formed into a tube shape with end surfaces 25 and 26 facing each other at the opening 432. For this reason, the welded pipe manufacturing apparatus 1 can form the band-shaped metal plate 2 into a tube shape without making complicated positional adjustments between parts using the forming apparatus 15A.
  • the forming device 15A can form the band-shaped metal plate 2 into a tube shape by providing the tube forming member 40 with the above-described main body 41, so that it can form a large number of breakdown rolls 151-156, fin pass rolls 157-160, etc. Compared to the molding device 150 having several rolls, the device can be made smaller.
  • the main body portion 41 forms the band-shaped metal plate 2 into a tube shape by aligning it along the inner wall of the through hole 43. Therefore, unlike the case of the breakdown rolls 151-156 described above, the band-shaped metal plate 2 is not pressed. As a result, the grooves formed by the stamping machines 13 and 14 in the band-shaped metal plate 2 are not crushed. According to the forming apparatus 15A, a welded pipe with improved heat exchange performance can be produced by having grooves in the inner wall.
  • the guide portion 42 provided on the tube forming member 40 has a protrusion 422 that protrudes from the inner wall of the through hole 43 and includes side walls 423 and 424 in the inner circumferential direction of the through hole 43. Further, in the protrusion 422, the side walls 423 and 424 extend in the direction from the opening 431 on the -X side of the through hole 43 to the opening 432 on the +X side, and the width from the side wall 423 to the side wall 424 extends from the opening 431 to the opening 432. It becomes smaller toward 432.
  • the side walls 423 and 424 are inserted between the end surfaces 25 and 26 of the strip metal plate 2 in the width direction, and the strip metal plate 2 is fed through the opening 431 on the -X side of the through hole 43.
  • the end surfaces 25 and 26 are formed into the shape of the side walls 423 and 424.
  • the side walls 423 and 424 have end surfaces 25 and 26 facing each other at an opening 432 on the +X side of the through hole 43.
  • the end surfaces 25 and 26 in the width direction of the band-shaped metal plate 2 are parallel to each other and the outer peripheral surface It is formed perpendicular to.
  • the strength of the welded pipe is further increased.
  • the joint of the welded pipe formed by the end surfaces 25 and 26 is prevented from shifting.
  • the edge rolls 20, 21 and side rolls 30, 31 provided in the forming apparatus 15A are rotated by a drive device, for example, a motor, thereby feeding the band-shaped metal plate 2.
  • a drive device for example, a motor
  • the molding device 15A is not limited to this.
  • the forming device 15A may include parts other than the edge rolls 20 and 21 and the side rolls 30 and 31, and these parts may feed the band-shaped metal plate 2.
  • the forming device 15B includes a conveying device 50 in order to feed the band-shaped metal plate 2.
  • Embodiment 2 a description will be given focusing on configurations that are different from Embodiment 1.
  • FIG. 11 is a top view of the forming device 15B included in the welded pipe manufacturing apparatus 1 according to the second embodiment.
  • FIG. 12 is a perspective view of the molding device 15B.
  • the thickness of the endless belts 51 and 52 is emphasized for easy understanding.
  • arrows A3-A6 indicate the rotational directions of the edge rolls 20, 21 and side rolls 30, 31 when the forming apparatus 15B operates.
  • the forming device 15B is configured to provide a tubular body shaped into a tube shape by the tube forming member 40, which the band-shaped metal plate 2 has on the downstream side of the tube forming member 40, that is, on the +X side.
  • a transport device 50 is provided to transport the portion, that is, the tube 3 shown in FIG. 10B in the +X direction.
  • the tube 3 is an example of a tubular metal plate as referred to in the present disclosure.
  • the conveyance device 50 has endless belts 51 and 52 with the tube 3 sandwiched between them.
  • the endless belt 51 has its axial direction directed in the Z direction and is wound around a cylindrical drive shaft 511 and a driven shaft 512 arranged in the X direction. Since the drive shaft 511 and the driven shaft 512 are provided close to the +Y side of the tube 3, the portion of the endless belt 51 that is wound between the drive shaft 511 and the driven shaft 512 and extends in the X direction is , is in contact with the tube 3 from the +Y side.
  • the drive shaft 511 is rotated by a drive device (not shown), for example, a motor, so that the endless belt 51 rotates as shown by arrow A1 and sends the tube 3 in the +X direction.
  • the endless belt 52 also has the same configuration as the endless belt 51 and sends the tube 3 in the +X direction.
  • the endless belt 52 is wound around a cylindrical drive shaft 521 and a driven shaft 522 arranged in the X direction, with the axial direction facing the Z direction.
  • a portion of the endless belt 52 that extends in the X direction by being wound between the drive shaft 521 and the driven shaft 522 is provided so that the drive shaft 521 and the driven shaft 522 are close to the -Y side of the pipe 3. Therefore, it is in contact with the pipe 3 from the -Y side.
  • the drive shaft 521 has the same configuration as the drive shaft 511 and rotates at the same rotation speed as the drive shaft 511, so that the endless belt 52 rotates as shown by arrow A2, and moves the tube 3 in the +X direction. send.
  • the endless belts 51 and 52 sandwich the tube 3 from the Y direction.
  • the endless belts 51 and 52 each feed the tube 3 in the +X direction, thereby applying a stronger force to the tube 3, for example, than the force exerted by the edge rolls 20, 21 and side rolls 30, 31 to feed the strip metal plate 2. Send with strong force.
  • the tube 3 is reliably sent out from the forming device 15B.
  • the forming device 15B includes the conveying device 50 having the endless belts 51 and 52, so the formed tube 3 is conveyed with strong force. Therefore, even if the force of the edge rolls 20, 21 and the side rolls 30, 31 to send out the band-shaped metal plate 2 is weak, the formed tube 3 can be reliably conveyed.
  • the welding machine 16A includes a high-frequency induction heating type or TIG type welding device that performs welding in the atmosphere.
  • the welding machine 16A is not limited to this.
  • the welding machine 16A may include other types of welding equipment.
  • the welding machine 16C includes a welding device that performs welding in a vacuum.
  • Embodiment 3 a welded pipe manufacturing apparatus 1 according to Embodiment 3 will be described.
  • Embodiment 3 a description will be given focusing on a configuration different from Embodiments 1 and 2.
  • FIG. 13 is a sectional view of a welding machine 16C included in the welded pipe manufacturing apparatus 1 according to the third embodiment.
  • the welding machine 16C includes an electron beam welding device 60 having a vacuum chamber 61.
  • the electron beam welding device 60 includes a cathode part to which a voltage is applied to generate an electron beam, an anode part to accelerate the electron beam, and an electron lens part to converge or deflect the electron beam.
  • the cathode section, anode section, and electron lens section are housed in a vacuum chamber 61.
  • a vacuum chamber 70 is provided adjacent to the vacuum chamber 61.
  • the vacuum chamber 70 accommodates the molding device 15A described in the first embodiment.
  • the vacuum chamber 70 has an inlet 71 and an outlet 72 formed on the -X side and the +X side.
  • the inlet 71 is formed in a rectangular shape slightly larger than the cross section of the band-shaped metal plate 2, and the band-shaped metal plate 2 is passed through the inlet 71.
  • the outlet 72 is formed in a circular shape slightly larger than the cross section of the welded pipe 6 produced by the manufacturing apparatus 1, and the welded pipe 6 produced by the manufacturing apparatus 1 is passed through the outlet 72.
  • the edge rolls 20 and 21, the side rolls 30 and 31, and the tube forming member 40 of the forming apparatus 15A described in the first embodiment are housed inside the vacuum chamber 70. Then, these edge rolls 20, 21, side rolls 30, 31, and tube forming member 40 form the band-shaped metal plate 2 put into the vacuum chamber 70 from the inlet 71 into a tube shape. Create a tube 3 in the +X section.
  • a communication hole 73 of the vacuum chamber 70 is formed on the +Z side of the produced tube 3. Further, a communication hole 62 is also formed in the vacuum chamber 61, and the communication hole 62 is located on the +Z side of the communication hole 73 mentioned above. As a result, the communication hole 62 is connected to the communication hole 73.
  • the electron beam welding device 60 emits an electron beam generated by the cathode portion toward the communication holes 62 and 73 described above. Then, the electron beam welding device 60 applies the electron beam to the joint where the end surfaces 25 and 26 of the tube 3 formed in the vacuum chamber 70 face each other. Thereby, the electron beam welding device 60 welds the seam of the tube 3 to produce the welded tube 6.
  • the edge rolls 20 and 21 and the side rolls 30 and 31 send out the band-shaped metal plate 2 in the +X direction.
  • the welded tube 6 produced by the electron beam welding device 60 and connected to the band-shaped metal plate 2 is sent out in the +X direction.
  • the produced welded tube 6 is supplied from the outlet 72 of the vacuum chamber 70 to the drawing machine 17, cutting machine 18, and recoiler 19 shown in FIG. 2, which are located outside the vacuum chamber 70. Note that the configurations of the drawing machine 17, the cutting machine 18, and the recoiler 19 have been explained in the first embodiment, so their explanation will be omitted in the third embodiment.
  • a vacuum pump (not shown) is connected to the vacuum chamber 70 in order to bring the vacuum chamber 70 to the degree of vacuum necessary for electron beam welding.
  • the vacuum pump must have an evacuation performance corresponding to the volume of the vacuum chamber 70 in order to bring the vacuum chamber 70 to a certain degree of vacuum and maintain that degree of vacuum. Therefore, if the volume of the vacuum chamber 70 is large, it is necessary to connect a large-sized vacuum pump with high exhaust performance to the vacuum chamber 70.
  • the forming apparatus 15A is smaller than the forming apparatus 150, which has a large number of rolls such as breakdown rolls 151-156 and fin pass rolls 157-160.
  • the volume of the vacuum chamber 70 is smaller than that in the case where the molding device 150 is accommodated.
  • the inside of the vacuum chamber 70 can be made to have the degree of vacuum necessary for electron beam welding. It is also easy to maintain the vacuum level.
  • the welding machine 16C includes the electron beam welding device 60 having the vacuum chamber 61 that accommodates the forming device 15A.
  • the forming apparatus 15A since the forming apparatus 15A is small, the volume of the vacuum chamber 61 is small, and as a result, the degree of vacuum required for electron beam welding can be easily achieved. Furthermore, since the volume of the vacuum chamber 61 is small, it is easy to maintain the necessary degree of vacuum.
  • the inlet 71 and outlet 72 of the vacuum chamber 70 are preferably connected to the outside via vacuum chambers 75 and 76, which have a lower degree of vacuum than the inside of the vacuum chamber 70.
  • the inlet 71 and outlet 72 of the vacuum chamber 70 are not directly connected to a space at atmospheric pressure, so the degree of vacuum in the vacuum chamber 70 can be easily maintained.
  • the forming apparatuses 15A, 15B, the welded pipe 6 manufacturing apparatus 1, the pipe 3 forming method, and the welded pipe 6 manufacturing method according to Embodiments 1-3 of the present disclosure have been described above, but the forming apparatuses 15A, 15B, The apparatus 1 for manufacturing the welded pipe 6, the method for forming the pipe 3, and the method for manufacturing the welded pipe 6 are not limited to these.
  • the forming apparatuses 15A and 15B include edge rolls 20 and 21, side rolls 30 and 31, and a tube forming member 40.
  • the molding devices 15A and 15B are not limited to this.
  • the forming devices 15A and 15B have through holes 43 whose diameters decrease as they go from the inlet to the outlet, and the band-shaped metal plate 2 curved in the width direction is fed from the inlet of the through hole 43.
  • a tube forming member that brings end surfaces 25 and 26 in the width direction of a band-shaped metal plate 2 closer to each other from an inlet to an outlet, and forms the band-shaped metal plate 2 into a tubular metal plate with end surfaces 25 and 26 facing each other at the exit.
  • the forming apparatuses 15A and 15B may be provided with a device that forms the band-shaped metal plate 2 curved in the width direction toward the entrance of the through hole 43. .
  • the tube forming member 40 provided in the forming apparatuses 15A and 15B has a rectangular parallelepiped outer shape, but the outer shape of the tube forming member 40 may be arbitrary as long as the above conditions are satisfied. be.
  • the outer shape of the tube molded member 40 may be cylindrical.
  • the tube forming member 40 has the guide portion 42 that forms the end surfaces 25 and 26 in the width direction of the band-shaped metal plate 2 to be formed into a tube shape into a mutually parallel shape.
  • the tube-formed member 40 is not limited to this.
  • the tube forming member 40 has a through hole 43 whose diameter decreases from the inlet to the outlet, and by feeding the band-shaped metal plate 2 curved in the width direction from the inlet of the through hole 43, The end surfaces 25 and 26 in the width direction of the band-shaped metal plate 2 are made to approach each other from the entrance to the exit, and at the exit, the band-shaped metal plate 2 is formed into a tubular metal plate with the end surfaces 25 and 26 facing each other. Bye. This is because even with such a configuration, the band-shaped metal plate 2 can be formed into a tubular metal plate without making complicated positional adjustments between parts.
  • the tube forming member 40 has a guide portion 42; If there is no need to suppress the movement, the guide portion 42 may be omitted.
  • the protrusion length L1 of the side walls 423, 424 of the protrusion 422 provided in the guide portion 42 becomes shorter from the entrance to the exit of the through hole 43.
  • the protrusion 422 is not limited to this.
  • the protrusion 422 protrudes from the inner wall of the through hole 43 and includes side walls 423 and 424 in the inner circumferential direction of the through hole 43. It is sufficient if the width becomes smaller from the entrance to the exit. Therefore, the protruding length L1 of the side walls 423 and 424 does not necessarily have to become shorter from the entrance to the exit of the through hole 43.
  • the protrusion length L1 may be constant. This is because even in such a configuration, the width from the side wall 423 to the side wall 424 only needs to become smaller as it goes from the entrance to the exit.
  • the tube forming member 40 has a truncated conical through hole 43 in order to curve the band-shaped metal plate 2 in the width direction and form it into a circular tube shape.
  • the through hole 43 is not limited to this.
  • the through hole 43 may have a diameter that decreases from the inlet to the outlet.
  • the through hole 43 may have an elliptical tube cross section in addition to a circular tube cross section.
  • the band-shaped metal plate 2 can be formed into a tube shape with an elliptical tube cross section.
  • the through hole 43 may have a flat tube cross section.
  • the welded pipe 6 manufacturing apparatus 1 includes an accumulator 12.
  • the manufacturing apparatus 1 for the welded pipe 6 is not limited to this.
  • the accumulator 12 has an arbitrary configuration. For example, if production efficiency may be lowered, the welded pipe 6 manufacturing apparatus 1 may not include the accumulator 12.
  • the welded pipe 6 manufacturing apparatus 1 includes stamping machines 13 and 14.
  • the manufacturing apparatus 1 for the welded pipe 6 is not limited to this.
  • the engraving machines 13 and 14 have an arbitrary configuration.
  • the welded pipe 6 manufacturing apparatus 1 does not need to include the marking machines 13 and 14.
  • the welded pipe 6 manufacturing apparatus 1 only needs to include at least one stamping machine 13, 14 to form the groove.
  • the welded pipe 6 manufacturing apparatus 1 does not include any machine or device after the recoiler 19.
  • the manufacturing apparatus 1 for the welded pipe 6 is not limited to this.
  • the welded pipe 6 manufacturing apparatus 1 may include an annealing device after the recoiler 19 in order to prevent the manufactured welded pipe 6 from cracking during bending or expansion.
  • an apparatus 1 for manufacturing a welded tube 6 is described using an example in which the welded tube 6 to be manufactured is a heat exchanger tube used in a heat exchanger.
  • the welded pipe 6 manufactured is not limited to this.
  • the forming apparatuses 15A and 15B, the welded pipe 6 manufacturing apparatus 1, the pipe 3 forming method, and the welded pipe 6 manufacturing method according to the embodiments of the present disclosure are capable of forming belt-shaped metal parts without complicated positional adjustment of parts. It is applicable to all types of tubes manufactured by forming the plate 2 into a tubular metal plate.
  • the forming apparatuses 15A and 15B, the welded pipe 6 manufacturing apparatus 1, the pipe 3 forming method, and the welded pipe 6 manufacturing method are not limited to the above-described embodiments 1-3, and various modifications and Substitutions can be added. Various aspects of the present disclosure are described below as supplementary notes.
  • a band-shaped metal plate having a through-hole whose diameter decreases from the inlet to the outlet and curved in the width direction is fed from the inlet of the through-hole, thereby forming a first end surface in the width direction of the band-shaped metal plate. and a second end surface that are brought closer to each other from the inlet toward the outlet, and a tube forming section that forms the band-shaped metal plate into a tubular metal plate in which the first end surface and the second end surface face each other;
  • a first side wall and a second side wall protruding from an inner wall of the through hole, the first side wall and the second side wall extending in a direction from the inlet to the outlet, and from the first side wall to the second side wall.
  • the protrusion has a protrusion whose width decreases from the inlet to the outlet, and in a state where the protrusion is inserted between the first end surface and the second end surface of the strip metal plate, the strip metal plate By being fed from the inlet, the first side wall and the second side wall contact the first end surface and the second end surface, and the first end surface and the second end surface are connected to the first side wall and the second side wall.
  • an end face molding part that is molded into a shape and makes the first end face and the second end face face each other; Equipped with Molding equipment.
  • the protrusion is made of a material having higher compressive strength and wear resistance than the band-shaped metal plate.
  • the tube forming part further includes a groove extending in a direction from the inlet to the outlet on the inner wall of the through hole,
  • the end face molding part further includes a support part that supports the protrusion and is fitted into the groove.
  • the molding device according to any one of Supplementary Notes 1 to 5.
  • the tube forming part is formed of a material softer than the band-shaped metal plate, At least a surface portion of the protrusion is formed of a harder material than the band-shaped metal plate.
  • (Appendix 8) further comprising a belt conveying device that feeds the band-shaped metal plate curved in the width direction to the inlet by pulling out the tubular metal plate formed into a tube shape by the tube forming unit from the outlet;
  • the molding device according to any one of Supplementary Notes 1 to 7.
  • (Appendix 9) a roll device that forms a band-shaped metal plate by curving a metal plate that is band-shaped and flat in the width direction of the band; It has a through hole whose diameter decreases as it goes from the inlet to the outlet, and the band-shaped metal plate curved in the width direction is fed through the inlet of the through-hole, thereby reducing the width of the band-shaped metal plate in the width direction.
  • a tube forming unit that brings one end surface and a second end surface closer to each other as they move from the inlet to the outlet, and forms the band-shaped metal plate into a tubular metal plate in which the first end surface and the second end surface face each other;
  • a first side wall and a second side wall protruding from an inner wall of the through hole, the first side wall and the second side wall extending in a direction from the inlet to the outlet, and from the first side wall to the second side wall.
  • the strip metal plate By being fed from the inlet, the first side wall and the second side wall contact the first end surface and the second end surface, and the first end surface and the second end surface are connected to the first side wall and the second side wall.
  • an end face molding part that is molded into a shape and makes the first end face and the second end face face each other;
  • a molding device comprising; a welding device for welding the first end surface and the second end surface of the tubular metal plate; Equipped with Welded pipe manufacturing equipment.
  • the welding device is an electron beam welding device that applies an electron beam to the first end surface and the second end surface of the tubular metal plate to weld the first end surface and the second end surface.
  • the welded pipe manufacturing apparatus according to appendix 9. (Appendix 11) a tube forming part having a through hole whose diameter decreases from the inlet to the outlet; A first side wall and a second side wall protruding from an inner wall of the through hole, the first side wall and the second side wall extending in a direction from the inlet to the outlet, and from the first side wall to the second side wall.
  • a method for manufacturing a tube using a forming device comprising: By feeding a band-shaped metal plate curved in the width direction from the inlet of the tube-forming section, the first end face and second end face in the width direction of the band-shaped metal plate are shaped as they move from the inlet to the outlet.
  • the band-shaped metal plate is When the metal plate is fed through the inlet, the first side wall and the second side wall come into contact with the first end surface and the second end surface, and the first end surface and the second end surface are connected to the first side wall and the second end surface. molded into the shape of a second side wall, and the first end surface and the second end surface are opposed to each other; How to form a tube.
  • Appendix 12 The method for forming a tube according to Appendix 11; Welding the opposing first end surface and second end surface of the tubular metal plate formed into a tubular shape by the tube forming method; Equipped with Method of manufacturing welded pipes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
PCT/JP2023/027347 2022-08-22 2023-07-26 成形装置、溶接管の製造装置、管の成形方法および溶接管の製造方法 Ceased WO2024042973A1 (ja)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4848357A (enrdf_load_stackoverflow) * 1971-08-16 1973-07-09
JPS5976690A (ja) * 1982-10-25 1984-05-01 Moriya Minamiura 缶胴の製造方法
JPS5999073U (ja) * 1982-12-20 1984-07-04 日新製鋼株式会社 溶接鋼管の製造装置
JP2000141033A (ja) * 1998-11-06 2000-05-23 Fuji Kikai Kosakusho:Kk 自動溶接装置
JP2012096267A (ja) * 2010-11-02 2012-05-24 Toyota Motor Corp 金属円管の製造装置及び製造方法
JP2016185560A (ja) * 2015-03-27 2016-10-27 日新製鋼株式会社 溶接管製造方法及び溶接管製造設備

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4848357A (enrdf_load_stackoverflow) * 1971-08-16 1973-07-09
JPS5976690A (ja) * 1982-10-25 1984-05-01 Moriya Minamiura 缶胴の製造方法
JPS5999073U (ja) * 1982-12-20 1984-07-04 日新製鋼株式会社 溶接鋼管の製造装置
JP2000141033A (ja) * 1998-11-06 2000-05-23 Fuji Kikai Kosakusho:Kk 自動溶接装置
JP2012096267A (ja) * 2010-11-02 2012-05-24 Toyota Motor Corp 金属円管の製造装置及び製造方法
JP2016185560A (ja) * 2015-03-27 2016-10-27 日新製鋼株式会社 溶接管製造方法及び溶接管製造設備

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